Sector:
ELECTRICAL AND ELECTRONICS
Qualification
Title:
ELECTRICAL
INSTALLATION
MAINTENANCE NC II
AND
PERFORM ROUGHING-IN ACTIVITIES,
Unit
of WIRING, AND CABLING WORKS FOR
SINGLE-PHASE DISTRIBUTION, POWER,
Competency:
LIGHTING, AND AUXILIARY SYSTEMS
PERFORMING ROUGHING-IN ACTIVITIES,
WIRING, AND CABLING WORKS FOR
Module Title:
SINGLE-PHASE DISTRIBUTION, POWER,
LIGHTING, AND AUXILIARY SYSTEMS
Logo here
Complete Training Center Name and
Address Here
HOW TO USE THIS COMPETENCY-BASED LEARNING MATERIAL
MODULE TITLE: PERFORM ROUGHING-IN ACTIVITIES, WIRING, AND
CABLING WORKS FOR SINGLE-PHASE DISTRIBUTION, POWER, LIGHTING,
AND AUXILIARY SYSTEMS.
This is a Competency-Based Learning Material for the Module: PERFORMING
ROUGHING-IN ACTIVITIES, WIRING, AND CABLING WORKS FOR SINGLEPHASE DISTRIBUTION, POWER, LIGHTING, AND AUXILIARY SYSTEMS.
This learning material contains activities for you to complete. It covers the
Knowledge, Skills and Attitudes required to complete the competency.
You are required to go through a series of learning activities in order to complete
each of the learning outcomes of this module. In each learning outcome, Learning
Elements and Reference Materials are available for your further reading to assist you
in the required activities. You are expected to accomplish all the required activities
and to answer the self-check after each learning element. Please note that you need
to have 100% correct answers to each self-check to pass the activity. You are
required to obtain answer sheets, which are available from your trainer or at the end
of each learning element, to reflect answers for each self-check. If you have
questions, please do not hesitate to ask your facilitator for assistance.
Recognition of Prior Learning (RPL)
You may have acquired some or most of the knowledge and skills covered in this
learning material because you have:
 Actual experience on the job.
 Already completed training in this area.
BENEFITS OF RPL









Gives credit for knowledge and experience.
Reduces duplication of learning.
Reduces costs of obtaining formal credentials.
Gives immediate feedback and determines which competencies need
verification and testing.
Identifies training gaps.
Training (is individualized and results in a recognized certificate).
Assists in professional development.
Allows for better use of time and resources.
Potentially saves on training costs.
So, if you can demonstrate to your trainer that you are competent in a particular skill,
you do not have to do the same training again. Or, if you feel you have the skills, talk
to your trainer about having them formally recognized. You may also show your
Certificates of Competence from previous training. And if your acquired skills are still
updated / relevant to the module, they may become part of the evidence you can
present for RPL.
A Record of Achievement is also provided for your trainer to fill-in upon completion of
this module.
This module was prepared to help you achieve the required competencies and
Learning Outcomes in Install Electrical Metallic / Non-Metallic (PVC Conduit), Install
Wire Ways and Cable Trays, Install Auxiliary Terminal Cabinet and Distribution
Panel, Prepare for Cable Pulling and Installation, Perform Wiring and Cabling
Layout, Notify Completion of Work. It will serve as a source of information for you to
acquire the required knowledge, skills, attitude, and inherent behaviour for the UNIT
OF COMPETENCY NO. 1: PERFORM ROUGHING-IN ACTIVITIES, WIRING, AND
CABLING WORKS FOR SINGLE-PHASE DISTRIBUTION, POWER, LIGHTING,
AND AUXILIARY SYSTEMS for the ELECTRICAL INSTALLATION AND
MAINTENANCE NC II qualification; and with minimum supervision or help from your
trainer. This material will aid you in acquiring the competency at your own pace,
independently.
To achieve the full benefit of this module:
 Talk to your trainer and agree on how you will both organize your training on
this unit. Read through the Competency Based Learning Material carefully. It
is divided into sections which cover all the skills and knowledge you need to
successfully complete this module.
 Most probably, your trainer will also be your supervisor. He / She will be there
to support and show you the correct way to do things. Ask for help if you need
one.
 Your trainer will tell you about the important things you need to consider when
doing the activities. It is important you listen and take notes.
 You will have plenty of opportunities to ask questions and undergo rigid
practice. This will help you in achieving competency in your new skill. Ample
practice will improve your speed, memory and confidence.
 Talk with more experienced colleagues and ask for guidance.
 Answer self-checks at the end of each section to test your own progress.
 When you finished each element and feel that you are ready, demonstrate the
activities outlined in the learning material to your trainer.
 As your work through the activities, your trainer will be taking note of your
performance. He / She will be providing feedback on your progress. Your
readiness for assessment will be reflected in his/her report, if and when you
have successfully completed each element.
INTRODUCTION TO THE MODULE
UNIT OF COMPETENCY :
PERFORM ROUGHING-IN ACTIVITIES, WIRING,
AND CABLING WORKS FOR SINGLE-PHASE
DISTRIBUTION,
POWER,
LIGHTING,
AND
AUXILIARY SYSTEMS
MODULE TITLE
:
PERFORMING
ROUGHING-IN
ACTIVITIES,
WIRING, AND CABLING WORKS FOR SINGLEPHASE DISTRIBUTION, POWER, LIGHTING, AND
AUXILIARY SYSTEMS
MODULE DESCRIPTOR :
This module covers the knowledge, skills and attitudes
on installing electrical metallic and non-metallic
conduit, wire ways and cable clamp, auxiliary terminal
cabinet and distribution frame panel board/safety
switch and used in roughing-in based on the required
performance standards. This module also covers the
outcomes required in preparing for cable pulling and
installation, performing wiring and cabling lay-out and
notifying completion of work for single-phase
distribution, power, lighting and auxiliary systems.
NOMINAL DURATION
4 Hours
:
Introduction:
This module contains information and learning activities in Performing Roughing-In
Activities, Wiring, and Cabling Works for Single-Phase Distribution, Power,
Lighting and Auxiliary Systems.
Upon completion of this module and you feel confident that you have had sufficient
practice, you may request your Trainer to arrange an appointment with a registered
Assessor for your assessment. The results of the assessment will be recorded in
your Competency Achievement Record.
SUMMARY OF LEARNING OUTCOMES:
At the end of this Competency-Based Learning Material, the learners are expected to
meet the following learning outcomes:
LO 1. Install Electrical Metallic / Non-Metallic (PVC Conduit)
LO 2.
Install Wire Ways and Cable Trays
LO 3.
Install Auxiliary Terminal Cabinet and Distribution Panel
LO 4.
Prepare Cable Pulling and Installation
LO 5.
Perform Wiring and Cabling Layout
LO 6.
Notify Completion of Work
ASSESSMENT CRITERIA
Critical Aspects of Assessment
Evidence of the following is critical:
LO 1. Install Electrical Metallic/Non-Metallic (PVC Conduit):
1.1 Correct drawings are interpreted based on job requirements.
1.2 Correct quantities of conduit, fittings and accessories are determined as per job
requirements.
1.3 Tools and equipment are selected as per job requirements.
1.4 Conduit is assembled ensuring that fittings are fully inserted and tightened as
per job requirements.
1.5 Conduit is bent with bends not exceeding 90° as per job requirements.
1.6 Conduit couplings and elbows are installed as per job requirements.
1.7 Conduit is threaded in line with job requirements.
1.8 Safety procedures are followed in line with standard operating procedures
(SOP’s).
LO
2.1
2.2
2.3
2.4
2.5
2. Install Wire Ways and Cable Tray:
Correct drawings are interpreted to determine job requirements.
Correct quantities of materials are selected as per job requirements.
Tools and equipment are selected as per job requirements.
Wire ways and cable trays are installed as per job requirements.
Safety procedures are followed in line with SOP’s.
LO
3.1
3.2
3.3
3.4
3.5
3.6
3. Install Auxiliary Terminal Cabinet, and Distribution Panel:
Correct drawings are interpreted to determine job requirements.
Correct quantities of materials are selected as per job requirements.
Tools and equipment are selected as per job requirements.
Auxiliary terminal cabinet is installed as per job requirements.
Auxiliary main distribution frame is installed as per job requirements.
Safety procedures are followed in line with SOP’s.
LO 4. Prepare for Cable Pulling and Installation:
4.1 Necessary tools, equipment, materials and personal protective equipment
(PPE) are prepared in line with job requirements.
4.2 Cable pulling & installation requirements and constraints from plan and site
inspection are identified as per job requirements.
4.3 Cable lay out & installation equipment is set up in accordance with
manufacturer's and job requirements.
4.4 Site is made safe and secure for cable installation.
4.5 Suitable protective clothing is selected and required safety devices are used.
4.6 Support structure is assessed as safe for normal working conditions.
LO 5. Perform Wiring and Cabling Layout:
5.1 Safety procedures are followed based on safety regulations PPE are identified
and selected in line with safety requirements.
5.2 Tools, equipment, pulling compound and safety requirements are identified and
obtained for the lay out and installation.
5.3 Pulling materials is properly installed and tensioned to required specifications.
5.4 Cable is secured permanently to support structure in accordance with standard
installation procedures.
5.5 Bending radius and loops tolerance is observed for cable materials at all times.
5.6 Schedule of wire cutting lists is followed based on estimates, quantity and sizes
to avoid wastage.
5.7 Further instructions are sought if unplanned events or conditions occur.
5.8 Checking of quality of work is done in accordance with instructions and
requirements.
LO 6. Notify Completion of Work:
6.1 Final checks are made to ensure that work conforms with instructions and job
requirements.
6.2 Supervisor is notified upon completion of work.
6.3 Tools, equipment and any surplus resources and materials are, where
appropriate, cleaned, checked and returned to storage in accordance with
established procedures.
6.4 Work area is cleaned up and made safe according to OHSA regulations.
Context of Assessment and Resources Implications:
Context of Assessment must ensure that:
 Assessment should include practical demonstration either in the workplace or
through a simulation activity, supported by a range of methods to assess
underpinning knowledge.
 Assessment must relate to the individual’s work area or area of responsibility.
 Demonstration of skills on more than one occasion.
 Evidence shall show that the knowledge and associate skills for planning
installations of integrated systems have been acquired.
 All knowledge and skills detailed in this module is contextualized to current
industry practices and technologies.
Resource Implications must ensure that:
 This module should be assessed as it relates to normal work practices using
procedures, information, and resources typical of a workplace, including OHS
policy and work procedures and instructions.
 Suitable work environment, facilities, equipment, and materials to undertake
actual work as prescribed in this module, which would include using a formal
learning and assessment environment.
 Where simulation is considered a suitable strategy for assessment, conditions
for assessment must be authentic and as far as possible reproduce and
replicate the workplace and be consistent with the approved industry
simulation policy.
 The resources used for assessment should reflect current industry practices
in relation to plan the installation of integrated systems.
Critical Aspects of the Qualification:
Evidence of the following is essential:
 The critical aspects of evidence are considered all prerequisites must be met.
 Evidence for competence in this module shall be considered holistically.
 Each element and associated performance criteria shall be demonstrated on
at least two occasions in accordance with the “Assessment Guidelines”.
 A representative body of performance criteria demonstrated within the
timeframes typically expected of the discipline, work function and industrial
environment.
 Implement Occupational Health and Safety workplace procedures and
practices, including the use of risk control measures as specified in the
performance criteria.
 Apply sustainable energy principles and practices as specified in the
performance criteria.
 Demonstrate an understanding of the required skills and knowledge as
described in this module.
 Demonstrate an appropriate level of skills enabling employment.
 Conduct work observing the relevant Anti-Discrimination legislation,
regulations, polices and workplace procedures.
 Demonstrated consistent performance across a representative range of
contexts in the performance criteria.
Assessment Methods:
Competent performance with inherent safe working practices is expected in the
Industry to which this module applies. This requires that the specified required skills
and knowledge are assessed in a structured environment which is primarily intended
for learning/assessment and incorporates all necessary equipment and facilities for
learners to develop and demonstrate the required skills and knowledge described in
this module.
The following methods may be used to assess competency for this module:
 Observation of practical candidate performance.
 Simulated practical exercises.
 Role plays.
 Oral and written questions.
Program/ Course
:
Unit of Competency
:
Module
:
ELECTRICAL INSTALLATION AND MAINTENANCE
NC II
Perform Roughing-In Activities, Wiring, and Cabling
Works for Single-Phase Distribution, Power, Lighting,
and Auxiliary Systems
Performing Roughing-In Activities, Wiring, and
Cabling Works for Single-Phase Distribution, Power,
Lighting, and Auxiliary Systems
Learning Outcome No. 1: Install Electrical Metallic/Non-Metallic (PVC Conduit)
Assessment Criteria:
1.1 Correct drawings are interpreted based on job requirements.
1.2 Correct quantities of conduit, fittings and accessories are determined as per job
requirements.
1.3 Tools and equipment are selected as per job requirements.
1.4 Conduit is assembled ensuring that fittings are fully inserted and tightened as
per job requirements.
1.5 Conduit is bent with bends not exceeding 90° as per job requirements.
1.6 Conduit couplings and elbows are installed as per job requirements.
1.7 Conduit is threaded in line with job requirements.
1.8 Safety procedures are followed in line with standard operating procedures
(SOP’s).
References:
 Martin, Isaac. The Complete Guide to Wiring: DIY Home electrical
Installations & Repairs with Step-By-Step Guide 2020. Isaac Martin.
 Simmons, Phil, and Mullin Ray C. Electrical Wiring – Commercial 16th Edition
2018. Cengage Learning.
 Black & Decker Home Improvement Library. Black & Decker: The Complete
Guide to Wiring Updated 7th Edition 2018. Quanto Publishing Group USA, Inc.
 Herman, Stephen L. Electrical Wiring – Industrial 15th Edition 2015. Cengage
Learning.
 Trandem, Bryan, Publisher. Black & Decker Home Improvement Library.
Black & Decker: The Complete Guide to Wiring 2011. Cengage Publishing
International.
 Home Skills. Wiring – Fix Your Own Lights, Switches, Receptacles Boxes,
Cables & More. Cool Springs Press.
 Black & Decker Home Improvement Library. Black & Decker: The Complete
Guide to Home Wiring 2001. Creative Publishing International.
 McReynolds, Ray. Step-By-Step Guide Book to Home Wiring 1st Edition1982.
Step-By-Step Guide Book, Co.
INFORMATION SHEET NO.: 1 / UC NO.: 1
INSTALL ELECTRICAL METALLIC/NON-METALLIC (PVC CONDUIT)
Introduction
Before cables and conductors are installed,
standard non-metallic conduit end bells must
be installed to prevent damage to the cables
and conductors. The contractor must trim the
inside and outside of cut ends to remove
rough edges. Cut ends of sectional conduit
must butt or come together for the full
circumference thereof. All open ends of nonmetallic conduit must be immediately capped
to keep moisture and debris out.
Types of Conduits, Fititngs, and Its Usage
Learning Ojectives:
After reading this Information Sheet, you should be able to:
1. Identify Different Typs of Conduits and Fittings.
2. Determine the Usage of Conduit and Fittings.
In this session, you will be able to gain knowledge, skills and attitude on installing
electrical metallic and non-metallic conduit, wire ways and cable clamp, auxiliary
terminal cabinet and distribution frame panel board/safety switch and used in
roughing-in based on the required performance standards.
In this session, we will also identify the different types of conduits and fittings used in
roughing-in activity for single-phase distribution, power, lighting and auxiliary
systems and determine its usage.
Raceway
An enclosed channel of metal or nonmetallic materials designed expressly for
holding wires, cables, or bus bars, with additional functions as permitted in this
Code. Raceways include, but are not limited to, rigid metal conduit, rigid nonmetallic
conduit, intermediate metal conduit, liquid tight flexible conduit, flexible metallic
tubing, flexible metal conduit, electrical nonmetallic tubing, and electrical metallic
tubing, under floor raceways, cellular concrete floor raceways, cellular metal floor
raceways, surface raceways, wire ways, and bus ways
Conduits
Conduits pipe is the most common electrical raceways used in all types of
construction. With respect to the type of materials used, conduit may be classified
into:
1. Metallic such as steel pipes, aluminum, etc.
2. Non-metallic such as plastic pipes.
Purposes of Electrical Conduits:
1. To provide a means for the running wires from one point to another.
2. To physically protect the wires.
3. To provide a grounded enclosure.
4. To protect the surroundings against the effect of fault in the wiring.
5. To protect the wiring system from damage by the building and occupants.
6. To protect the building and the occupants from damage by the electric
system.
With respect to its make, Conduit may be classified as:
1. Rigid Metal.
2. Flexible Metal.
3. Rigid – Non-Metal.
4. Flexible – Non-Metal.
5. PVC Conduit.
Electrical Conduits & Fittings
Electrical conduits are metal, plastic or fiber pipes designed to protect electrical
cables and wires. They’re used in just about every residential and commercial
establishment, especially for wiring that is either exposed, or fitted outdoors. Since
they are essentially a safety feature, you should select the material, size and fittings
based on the environment of the installation and the type of wiring it will be housing.
When it comes to options, there are almost as many types of conduits as there are
wires and cables, and they can be broadly classified into metallic and nonmetallic
variants. Here are some of the most common types under these categories:
Type of Metallic Conduit
1. Rigid Metallic Conduit (RMC) or Rigid Steel
Conduit (RSC) serves the same purpose as with the
Electrical Metallic Tubing. It is designed to protect the
electrical wiring of building from electrical hazard due
to faulty wiring. It is usually installed buried in
concrete wall floor and ceiling, in masonry or similar
materials. It is also used for exposed and concealed
work, and it provides maximum protection when there is
mechanical damage. For this wiring method to be
effective, safe and reliable, it is a must that it should follow the Philippine
Electrical Code (PEC) standard and specifications.
2. Electrical Metallic Tubing (EMT) – These are by far the
most commonly used conduits, even though they’re not
technically conduits at all (they’re actually classified as
tubing). EMTs are usually called “thin-walls”, since they have
a much thinner wall than RMCs, which is why they should
not be used in places where they’re likely to encounter stresses. These are
also available in galvanized steel or with a rust- resistant coating, and can be
used in most indoor and outdoor applications, as ground conductors,
embedded in concrete and for direct burial too. They are much lighter and
bend easily, and fittings for EMTs are both readily available and inexpensive.
3. Intermediate Metallic Conduit (Ferrous Metal) – The intermediate metallic
conduit is listed threaded raceway of circular cross section with coupling
which can be straight tapped conduit coupling. Intermediate metallic conduits
are available in trade sizes ½” through 4inches.
4. Flexible Metallic Tubing (FMT). Flexible metallic
tubing is a kind of wiring installation which is
commonly used for external motor terminal
connection. It is being manufactured in the form of a
coil. A flexible conduit consists of flexible steel tube
which is made from convex to concave metal strip in
a spiral winding with length from 50 to 200 feet.
Type of Non-Metallic Conduit
1. Rigid Polyvinyl Chloride Conduits (PVC) –
PVC conduits are available in both Schedule 40
and 80, which are basically ratios of the thickness
of the wall to its outer diameter. Both have the
same outer diameter, which means a Schedule
40 conduit will have a thinner wall, so it is not
permitted for installations where the conduit will
be exposed to physical stresses. Most commonly,
the sections have one belled end and can be joined together, or to fittings
using solvent welding. PVC conduits are rated for almost any application,
especially since they are flame retardant, resistant to sunlight and very
affordable. However, they cannot be used in hazardous locations, as ground
conductors or in locations where they are exposed to ambient temperatures
over 50°C.
2. Flexible Electrical Nonmetallic Tubing (ENT)
Electrical non-metallic tubing (ENT) is flexible
corrugated plastic tubing that is moisture-resistant
and flame- retardant. It is easy to bend and installs
with snap-lock or glued plastic fittings. Unlike EMT,
non-metallic tubing cannot install in exposed
locations, so it is commonly used inside walls. In
addition to installation in standard wood- or metalframe walls, ENT can be installed inside concrete
block structures and can be covered with concrete.
Due to the blue color of one common brand of this conduit, ENT is nicknamed
smurf tube, after the Smurfs cartoon characters.
Conduit Fittings
Conduit fittings are available in a huge variety of sizes, shapes and materials, and
they’re normally used for connecting runs of conduit together, and for connecting
conduit ends to boxes, enclosures or electrical devices. Fittings are needed to
connect conduits to boxes or enclosures of different sizes and when the direction of
most metallic conduits has to be changed. There are also straps and clamps, which
are used to provide additional support to conduits and to keep them secured. You
may need to use special types of fittings if a conduit run is likely to be exposed to
moisture, vapors, or hazardous conditions.
Types of Fittings
Section 110-3 of the NEC requires all the components to be listed and labeled, so all
listed parts meet certain construction and performance requirements. However, the
Code does not specify the material used for the fittings, of which there are several.
This will be determined by availability, design considerations or personal preference.
If you’re unsure about how the conditions will affect the fittings, you can contact a
manufacturer with details of your application, consult a local distributor, or get an
engineering recommendation.
Conduit fittings can be listed as follows, based on the function they serve and how
they are installed:
1. Conduit Bodies.
A conduit body can be used to provide pulling access in a run of conduit, to allow
more bends to be made in a particular section of conduit, to conserve space
where a full size bend radius would be impractical or impossible, or to split a
conduit path into multiple directions. Conductors may not be spliced inside a
conduit body, unless it is specifically listed for such use. Conduit bodies differ
from junction boxes in that they are not required to be individually supported,
which can make them very useful in certain practical applications. Conduit bodies
are commonly referred to as condulets, a term trademarked by Cooper CrouseHinds Company, a division of Cooper Industries
Conduit bodies come in various types, moisture ratings, and materials, including
galvanized steel, aluminum, and PVC. Depending on the material, they use
different mechanical methods for securing conduit. Among the types are:
a. L-shaped bodies ("Ells") include the LB, LL, and LR, where the inlet is in line
with the access cover and the outlet is on the back, left and right, respectively.
In addition to providing access to wires for pulling, "L" fittings allow a 90
degree turn in conduit where there is insufficient space for a full- radius 90
degree sweep (curved conduit section).
LR L-Right
C ondu let
LB L-Box
C ondu let
LL L-Left
C ond ulet
b. T-shaped bodies ("Tees") feature an inlet in line with the access cover and
outlets to both the cover's left and right.
c. C-shaped bodies ("Cees") have identical openings above and below the
access cover, and are used to pull conductors in a straight runs as they make
no turn between inlet and outlet.
d. Conduit Bends. To save time, equipment and labor costs, you can tackle
changes in the direction of a conduit with pre-fabricated bends. Commonly
called „factory bends‟ or „elbows‟, they are available in a variety of lengths and
curvatures, and according to NEC requirements, you can bend certain tubings
by hand, using a mechanical bender, or a hydraulic bender for larger ones.
However, an installation may require a lot of bends, and bending conduits on
location might damage them or reduce the internal diameter. Even with the
use of factory bends, the NEC does restrict the number of bends you can
have between pull boxes to a maximum of 360°, including offsets at the box or
enclosure.
e. Elbow is the bent section of the conduit or tubing used to change raceway
direction or by pass obstruction.
f. Nipples are short length of conduit or tubing materials used to extend a
conduit system. Nipples are used between conduit or tubing and items such
as boxes or enclosures between two boxes.
g. Coupling is a device connecting two pieces of pipes in order to extend their
length. Each length of IMC is furnished with coupling on one end, to permit a
joint.
h. Bushings and Locknuts. Bushings create a smooth entry point to conduits
without any sharp edges, protecting the conductors from damage during wire
pulls. They are also extremely important when the conduit system enters an
enclosure or bus box. A bushing is installed on the inside of the box opening
and threaded into the conduit end, separating the conductors from the edges
of both the opening and the conduit end. Locknuts are threaded on the inside,
with teeth on one surface or both, which grip the surface. They installed on
both sides of the opening to ensure that both the conduit and bushing are held
firmly in place. If the locknut has teeth on only one side, that side should face
the box.
i. Connectors. It is used to attach metallic or non-metallic conduit to the
junction or utility boxes.
j. Strap and Clamps. Electrical materials used to hold and anchor electrical
conduits in its proper position.
k. Reducers and Reducing Washers. A reducer is a special
kind of combination coupling that allows you to connect
raceways of one trade size to larger or smaller ones.
Although it’s generally better to use a pull box, reducers are
handy for areas that have limited space.
Reducing washers, or threaded reducers, are similar to hubs, except both the
inner and outer surfaces are threaded. They are used to connect conduits to
enclosure or box openings that have a larger diameter, with locknuts on both
sides to fasten them in place.
Electrical installation for conduits and fittings required to follow the PEC provision.
And try your knowledge by answering the Self-Check 1.1. and compare your answer
to Answer Key1.1.
SELF-CHECK NO.: 1 / UC NO.: 1
INSTALL ELECTRICAL METALLIC/NON-METALLIC (PVC CONDUIT)
Instruction: Choose the correct answer and encircle the letter of your choice.
Identify Conduit and Fittings
1. It is fittings used to hold and anchor electrical conduits in its proper position.
A. Bending.
B. Offset.
C. Conduit Bending.
D. Strap and Clamps.
2. What type of conduit designed to protect the electrical wiring of building from
electrical hazard due to faulty wiring?
A. Electrical Metal Tubing.
B. Rigid Steel Conduit.
C. Poly Vinyl Chloride.
D. Armored Cable (BX).
3. What type of fitting is used to secure EMT to metallic boxes?
A. Connector.
B. Adapter with Lock Nut.
C. Condulets.
D. Coupling.
4. It is a type of fitting which is used to change direction.
A. Connector.
B. Coupling.
C. Adaptor.
D. Elbow.
5. It is a short length conduit or tubing which is used to extend a conduit system
and used between conduit and tubing such as boxes or enclosures between
two boxes.
A. Connector.
B. Coupling.
C. Nipple.
D. Condulets.
ANSWER KEY NO.: 1 / UC NO.: 1
INSTALL ELECTRICAL METALLIC/NON-METALLIC (PVC CONDUIT)
1. D.
2. B.
3. B.
4. D.
5. C.
Program/ Course
:
Unit of Competency
:
Module
:
ELECTRICAL INSTALLATION AND MAINTENANCE
NC II
Perform Roughing-In Activities, Wiring, and Cabling
Works for Single-Phase Distribution, Power, Lighting,
and Auxiliary Systems
Performing Roughing-In Activities, Wiring, and
Cabling Works for Single-Phase Distribution, Power,
Lighting, and Auxiliary Systems
Learning Outcome No. 2: Install Wire Ways and Cable Trays
Assessment Criteria:
2.1 Correct drawings are interpreted to determine job requirements.
2.2 Correct quantities of materials are selected as per job requirements.
2.3 Tools and equipment are selected as per job requirements.
2.4 Wire ways and cable trays are installed as per job requirements.
2.5 Safety procedures are followed in line with SOP’s.
References:
 Martin, Isaac. The Complete Guide to Wiring: DIY Home electrical
Installations & Repairs with Step-By-Step Guide 2020. Isaac Martin.
 Simmons, Phil, and Mullin Ray C. Electrical Wiring – Commercial 16th Edition
2018. Cengage Learning.
 Black & Decker Home Improvement Library. Black & Decker: The Complete
Guide to Wiring Updated 7th Edition 2018. Quanto Publishing Group USA, Inc.
 Herman, Stephen L. Electrical Wiring – Industrial 15th Edition 2015. Cengage
Learning.
 Trandem, Bryan, Publisher. Black & Decker Home Improvement Library.
Black & Decker: The Complete Guide to Wiring 2011. Cengage Publishing
International.
 Home Skills. Wiring – Fix Your Own Lights, Switches, Receptacles Boxes,
Cables & More. Cool Springs Press.
 Black & Decker Home Improvement Library. Black & Decker: The Complete
Guide to Home Wiring 2001. Creative Publishing International.
 McReynolds, Ray. Step-By-Step Guide Book to Home Wiring 1st Edition1982.
Step-By-Step Guide Book, Co.
INFORMATION SHEET NO.: 2 / UC NO.: 1
INSTALL WIRE WAYS AND CABLE TRAYS
Introduction
in the electrical wiring of building, a cable tray system is
used to support insulated electrical cables used for power
distribution, control, and communication. Cable trays are
used as an alternative to open wiring, or electrical conduit
systems, and are commonly used for cable management
in commercial and industrial construction. They are
especially useful in situations here changes to a wiring
system are anticipated, since new cables can be installed
by laying then in the tray, instead of pulling them through
a pipe.
According to the National Electrical Code (NEC), a cable
tray is a unit or assembly of units or sections and
associated fittings forming a rigid structural system used
to securely fasten, or support cables and raceways.
After reading this Information Sheet, you will be able to:
1. Determine the correct materials for the job.
2. Identify the correct quantity of materials for a job.
In the previous sessions, you have already identified the different types of conduit
and fittings used in wire ways and wire tray. In this session, we will discuss the
terminology used in pipe bending, compute take up for stubs and determine the
bending types.
Bending
Bending is a technique used in various metal forming processes with the aim of
increasing the fabrication capabilities of plumbing and electrical fixtures. The pipe
can be bent at varying angles and in different directions. The simplest curve turns
the tube at an angle of 90 degrees forming an elbow.
Back-To-Back: Two ninety degree bends in one conduit, usually with both stubs
turned up on the same plane forming a “U”.
Electrical Metallic Tubing (EMT): conduit made to protect conductors and cables,
also known as thin-wall. Manufacturedin10‟lengths, in sizes ranging from 1/2” to 4”.
EMT sizes 1/2”, 3/4”, 1”, and 1 1/4” can be bent using a hand bender.
Hand Benders: Benders having a full shoe that the pipe is formed around. Used for
hand bending EMT, IMC, and Rigid pipe.
Gain: The amount of pipe gained (saved) by bending on a radius and not at right
angles.
Kick: A bend of less than 90 degrees placed in a conduit to change direction.
Leg Length: The longest part of a ninety degree bend.
Ninety Degree Bend: Any radius bends in a conduit that changes the direction of
the pipe ninety degrees.
O. D.: Outside diameter of a pipe.
Offset: Two identical bends placed in a conduit to change direction or elevation of
the pipe run.
Radius: The relative size of the bent portion of a pipe.
Reference Point: A mark used to locate the edge of an obstruction for bending
saddles.
Shrink: The amount a conduit reduces in total length after an offset is bent.
Stub: The shortest part of a ninety degree bend.
Take-Up: The amounts that must be subtracted from the desired stub length of a
ninety degree bend to ensure that the bend is accurate.
Instructions for 90 Degree Bends Take-Up Table for Stubs
Paper Size
Take-Up
½” EMT
5”
¾” EMT – ½” Rigid
6”
1” EMT – ¾” Rigid
8”
1 ¼” EMT – 1” Rigid
11”
To bend a ninety degree bend, you first determine your desired stub height. Then,
you subtract the take-up for the size pipe that you are bending from the desired stub
height and mark the pipe.
Example: You want to bend a 15” stub using 1/2” EMT. Because the take up for 1/2”
EMT is 5”, you will subtract 5” from
15” 15” – 5” = 10”
Then, using a pull-push rule: measure from the end of the pipe back 10”. Mark the
pipe at10”.
Next, align the mark that you have made with the arrow on the bender.
Being careful to keep the arrow at your mark, put the pipe and bender on the floor.
With your foot, bend the pipe until it is bend ninety degrees. Use a torpedo level to
check for accuracy.
SELF-CHECK NO.: 2 / UC NO.: 1
INSTALL WIRE WAYS AND CABLE TRAYS
Directions: Use the constant take-up for 1/2”, 3/4”, 1”, and 11/4” EMT to solve the
following questions.
1. If you are bending a 54” stub on a ¾” conduit how far from the end of the
conduit will you put your bending mark?
2. If you put the arrow on the bender 22” from the end of a 1 ¼” conduit, what
will the stub height be?
3. The conduit size is 1”. The arrow mark is at 52”. What will the stub height be?
4. You want to bend a 26 1/2” stub on a 1/2” conduit. Where will you put your
bending mark? For the problems below, fill in the blanks with the correct
answer. You want to bend a 19 5/8” stub. Where will you mark your pipe when
it bending:
5. 1/2” EMT?
6. 1 1/4” EMT?
7. 1” EMT?
You want to bend a 31 3/4” stub. Where will you mark your pipe when it bending:
8. 3/4” EMT? __________
9. 1/2” EMT? __________
10.11/4” EMT? __________
ANSWER KEY NO.: 2 / UC NO.: 1
INSTALL WIRE WAYS AND CABLE TRAYS
1. 48”.
2. 33”.
3. 60”.
4. 2 1 1/2”.
5. 14 5/6”.
6. 8 5/8”.
7. 11 5/8”.
8. 25 3/4”.
9. 26 3/4”.
10. 20 3/4".
Program/ Course
:
Unit of Competency
:
Module
:
ELECTRICAL INSTALLATION AND MAINTENANCE
NC II
Perform Roughing-In Activities, Wiring, and Cabling
Works for Single-Phase Distribution, Power, Lighting,
and Auxiliary Systems
Performing Roughing-In Activities, Wiring, and
Cabling Works for Single-Phase Distribution, Power,
Lighting, and Auxiliary Systems
Learning Outcome No. 3: Install Auxiliary Terminal Cabinet and Distribution
Panel
Assessment Criteria:
3.1 Correct drawings are interpreted to determine job requirements.
3.2 Correct quantities of materials are selected as per job requirements.
3.3 Tools and equipment are selected as per job requirements.
3.4 Auxiliary terminal cabinet is installed as per job requirements.
3.5 Auxiliary main distribution frame is installed as per job requirements.
3.6 Safety procedures are followed in line with SOP’s.
References:
 Martin, Isaac. The Complete Guide to Wiring: DIY Home electrical
Installations & Repairs with Step-By-Step Guide 2020. Isaac Martin.
 Simmons, Phil, and Mullin Ray C. Electrical Wiring – Commercial 16th Edition
2018. Cengage Learning.
 Black & Decker Home Improvement Library. Black & Decker: The Complete
Guide to Wiring Updated 7th Edition 2018. Quanto Publishing Group USA, Inc.
 Herman, Stephen L. Electrical Wiring – Industrial 15th Edition 2015. Cengage
Learning.
 Trandem, Bryan, Publisher. Black & Decker Home Improvement Library.
Black & Decker: The Complete Guide to Wiring 2011. Cengage Publishing
International.
 Home Skills. Wiring – Fix Your Own Lights, Switches, Receptacles Boxes,
Cables & More. Cool Springs Press.
 Black & Decker Home Improvement Library. Black & Decker: The Complete
Guide to Home Wiring 2001. Creative Publishing International.
 McReynolds, Ray. Step-By-Step Guide Book to Home Wiring 1st Edition1982.
Step-By-Step Guide Book, Co.
INFORMATION SHEET NO.: 3 / UC NO. 1
INSTALL AUXILIARY TERMINAL CABINET AND DISTRIBUTION PANEL
Introduction
Distribution Board
In the construction area, the main distribution board shall be of
the totally enclosed, free standing type, made of galvanized
sheet steel of 2mm minimum thickness properly reinforced
and braced, made up of vertical sections. Each incoming
circuit shall occupy a cubicle with its own door. It shall be
properly ventilated and vermin proof and specially treated for anti-corrosion.
The board shall be constructed to be suitable for
interchangeability of breakers and for future extension. The
board shall be suitable for top or bottom cable connections,
and shall be provided with gland plates, removable for drilling
on site.
Rigid Steel Conduit (RSC)
Learning Objective:
After reading this information sheet you will be able to:
1. Determine steps and techniques in RSC cutting and bending.
2. Perform cutting and bending Rigid Steel Conduit.
In the previous sessions, you were able to identify the pipe bending vocabulary used
in pipe bending. Also, you were able to calculate take-up for stubs. This skill is
essential for electrical pipe installation.
In this session, you will be able to gain the knowledge and skills on rigid steel conduit
bending and cutting for pipe installation. It is a must that, as a EIM student you the
skills and knowledge on installing conduit/pipes for wire ways with the provision 00
Philippine Electrical Code (PEC).
Rigid Steel Conduit (RSC)
A rigid steel conduit serves the same purpose as with the Electrical Metallic Tubing.
It is designed to protect the electrical wiring of building from electrical hazard due to
faulty wiring. It is usually installed buried in concrete wall floor and ceiling, in
masonry or similar materials. It is also used for exposed and concealed work, and it
provides maximum protection when there is mechanical damage. For this wiring
method to be effective, safe and reliable, it is a must that it should follow the
Philippine Electrical Code (PEC) standard and specifications.
PEC Provisions
The Philippine Electrical Code is a set of rules and regulations which govern all
electrical wiring. The following standard and specifications must be followed in
installing Rigid Metal Conduit:
Standard Size of RSC
Rigid metal conduit has smooth inside diameter. Its standard length follows the gas
pipe which is 10 feet and a diameter from ½”, ¾”, up to 6 inches.
Installation Under Atmospheric Condition?
Protected by enamel. Conduit protected only with enamel is permitted only in
indoor occupancies not subjected to severe corrosive influences.
Dissimilar metal. Contacts of metal to another metal must be avoided in installing
RSC to prevent the possibility of galvanic reaction.
Corrosion protection. Conduits fitting with corrosion protection are permitted to be
installed in concrete, direct earth burial or in areas subjected to corrosive influences.
Number of conductors inside the conduit
The table below shows the number of conductors permitted in a single conduit.
Maximum number of conductors allowed in trade size conduit from ½” - 3
inches.
Bends
Rigid steel conduit can also be bent using a hickey or conduit bender. It follows the
same procedure as that in bending electrical metallic tubing.
Bend on Electrical Metallic Tubing
Suppose the right angle bend is to be made and that the conduit is to have a rise of
18” above the floor. Assuming that the conduit is ½ in diameter, subtract 5” from the
rise of 18” that leaves 13”. Hook the bender over the rigid metal conduit so that the
arrow on the bender points to a point 13 inches from the end of the metal conduit as
shown in figure 2. If the size of the conduit is ¾, subtract 6”. If the size is 1”, subtract
8” from the desired measurements.
The different bends that are common in a conduit installation are that the following:
1. Right-angle bends.
2. Off-set bends.
3. Cross-over or saddle bends.
4. Goose neck bends.
Figure 1: Shown the application on the above-mentioned bend
In bending a metal conduit, a pipe bender or hickey is commonly used by
electricians.
There are several methods however, that are used in bending in the absence of
hickey, like the one illustrated below.
Figure 2: Methods of Bending
Bending 90-degrees angle on metal rigid conduit
1. Lay the conduit on the ground and slip the hickey on the conduit where the
first bend is to be made.
2. If it is necessary, thread the ends of the conduit before bending.
3. Step on rigid conduit and bend it at 20 to 30 degrees at a time.
4. The bend must be gradual and equal to a radius 6 times the diameter of the
conduit.
5. The hickey should be move downward after applying pressure to it.
6. The rigid conduit may be held on a pipe vise instead of stepping on it.
Bending a 90˚ angle; on ½ thin-wall metal conduit, or Electrical Metal Tubing
(EMT).
Layout the right angle bends 1/2” Electrical Metal Tubing (EMT) or thin wall conduit.
From the rise, subtract 5” for ½” conduit, 6” for ¾” and 8” for 1” conduit. Supposed
the desired rise of a bend is 16” you will have 11” left.
Hook the bender over the conduit. Let the arrow on the bender point to the 11” marks
from the end of the conduit.
Illustration below shows the movements and position of the hickey in making the 90
degree bend on a conduit.
Apply pressure on the handle of the Bender, while one foot is stopping on the
conduit and the other on the bender.
Bending a Rigid Conduit for an Off-set
1. Determine the distance of the first bend (from one end of the conduit) and the
throw of the off – set.
2. Insert the hickey just a few centimeters from the end of the conduit and make
the first bend.
3. With the hickey in upside down position, slip the conduit in the jaw of the
hickey and make the second bend to complete the off-set.
SELF-CHECK NO.: 3 / UC NO.: 1
INSTALL AUXILIARY TERMINAL CABINET AND DISTRIBUTION SYSTEM
Instructions: Read the following statements carefully and write your answers on the
space provided for.
1. ____________________ It is the standard length of Rigid Steel Conduit.
2. ____________________ A tools use for bending rigid steel conduit.
3. ____________________ A two identical bends placed in a conduit to
change direction or elevation of the pipe run.
4. ____________________ A simplest bend in a conduit.
5. ____________________ A U-shaped bend with a 90 degree on it send.
ANSWER KEY NO.: 3 / UC NO.: 2
INSTALL AUXILIARY TERMINAL CABINET AND DISTRIBUTION SYSTEM
1. 10 feet.
2. Hickey.
3. Back-To-Back.
4. 90 degrees bend.
5. Back-To-Back.
Program/ Course
:
Unit of Competency
:
Module
:
ELECTRICAL INSTALLATION AND MAINTENANCE
NC II
Perform Roughing-In Activities, Wiring, and Cabling
Works for Single-Phase Distribution, Power, Lighting,
and Auxiliary Systems
Performing Roughing-In Activities, Wiring, and
Cabling Works for Single-Phase Distribution, Power,
Lighting, and Auxiliary Systems
Learning Outcome No. 4: Prepare for Cable Pulling and Installation.
Assessment Criteria:
4.1 Necessary tools, equipment, materials and personal protective equipment
(PPE) are prepared in line with job requirements.
4.2 Cable pulling & installation requirements and constraints from plan and site
inspection are identified as per job requirements.
4.3 Cable lay out & installation equipment is set up in accordance with
manufacturer's and job requirements.
4.4 Site is made safe and secure for cable installation.
4.5 Suitable protective clothing is selected and required safety devices are used.
4.6 Support structure is assessed as safe for normal working conditions.
References:
 Martin, Isaac. The Complete Guide to Wiring: DIY Home electrical
Installations & Repairs with Step-By-Step Guide 2020. Isaac Martin.
 Simmons, Phil, and Mullin Ray C. Electrical Wiring – Commercial 16th Edition
2018. Cengage Learning.
 Black & Decker Home Improvement Library. Black & Decker: The Complete
Guide to Wiring Updated 7th Edition 2018. Quanto Publishing Group USA, Inc.
 Herman, Stephen L. Electrical Wiring – Industrial 15th Edition 2015. Cengage
Learning.
 Trandem, Bryan, Publisher. Black & Decker Home Improvement Library.
Black & Decker: The Complete Guide to Wiring 2011. Cengage Publishing
International.
 Home Skills. Wiring – Fix Your Own Lights, Switches, Receptacles Boxes,
Cables & More. Cool Springs Press.
 Black & Decker Home Improvement Library. Black & Decker: The Complete
Guide to Home Wiring 2001. Creative Publishing International.
 McReynolds, Ray. Step-By-Step Guide Book to Home Wiring 1st Edition1982.
Step-By-Step Guide Book, Co.
INFORMATION SHEET NO.: 4 / UC NO. 1
PREPARE FOR CABLE PULLING AND INSTALLATION
Introduction
Cable pulling is the moving of lengths of cable
from one place to another in order to install a
connection of some type between disparate
areas.
Fiber optic cables should always be pulled
by the strengthened yarn fibers inside the
outer jacket. This strength member can be
exposed by removing a small portion of the
jacket with a three-hole cable stripper.
After reading this session, you will be able to:
1. Determine tools used in cutting and reaming conduit pipes.
2. Perform cutting of conduit with the use of hacksaw.
In the previous sessions, you were able to determine steps and techniques in pipe
bending. This skills and knowledge is essential in preparing and installing
conduits/pipes.
In this session, you will be able to perform pipe cutting and reaming. Which is
essential in installing electrical raceway?
Cutting Conduits Using Hacksaw
When cutting any conduit with a hacksaw, use a blade with 18 to 32 teeth per inch. A
blade with fewer teeth hangs up, binds, or even breaks. Put the blade in the hacksaw
frame (with the teeth pointing forward) so that the teeth cut when you push the saw
forward. Place the pipe in the vise so that there is ample room between the vise and
the cut.
The conduit is cut with a hacksaw or pipe cutter. For easy and safe way of cutting, a
bench vise is recommended so that the pipe can be held firmly while it is being cut.
Preparing and Cutting Pipes for Installation
1. A hacksaw is the most important cutting tool for sawing metal to size.
2. There are many different types of hacksaws, but in general they consist of a
fixed or adjustable frame with a renewable hacksaw blade.
3. The hacksaws illustrated show one with a straight handle and one with a
pistol grip handle.
4. Hacksaw blades are classified by length and the number of teeth per 25 mm
cutting edge.
5. For cutting conduit pipe, blades with a pitch of 24 teeth or 32 teeth per 25 mm
of the cutting edge are recommended.
6. Pipes to be cut must be held steady and prevented from rotating by holding
them in a suitable vise. This is a self-locking, hinged pipe vise and is available
in a number of sizes.
6. The portable folding pipe vise is very practical as a mobile workplace and is
used especially on building sites.
7. Chain pipe vises are made to hold pipes with an outside diameter of up to 8"
or 200 mm. They are mounted on solid benches.
8. Open the vise and insert the pipe so it is horizontal and parallel to the jaw
serrations.
9. Keep the part which is to be cut as close to the jaws as possible in order to
stop vibrations
10. Before you cut any conduit pipes, make sure you have measured and marked
the correct length exactly
11. Check that the blade is lightly tightened in the frame and that the teeth point
forward.
12. Take up the hacksaw and position yourself as shown here, with yourself
shoulder pointing in the direction you intend to cut. Note the position of the
feet, which allows free and controlled movement of the body when cutting.
13. Before finishing the cutting operation, the pipe must be supported with the left
hand.
14. This will prevent the blade of the hacksaw being damaged.
Ream
After cutting the pipe with hacksaw or pipe cutter, it leaves burrs. This must be
removed to avoid damage of wire insulation when the wire is inserted in to the pipe.
A reamer or round file can be used to remove burrs.
Threads
Since rigid metal conduit is commonly used in wet places, sealing of termination can
be best done if the pipe is threaded. These will prevent water from entering the
conduit. The use of dies and dies stock keep the end of the pipe threaded. The sizes
of dies stock ranges from ½ to 6inches.
SELF-CHECK NO.: 4 / UC NO.: 1
PREPARE FOR CABLE PULLING AND INSTALLATION
Instructions: Read the following statements carefully and write your answers on the
space provided for,
1. What are the different bends that are common in a conduit installation?
2. Tools used in cutting Rigid Steel Conduit.
3. What is the meaning of RSC?
4. A process in putting threads in pipes.
5. A process in cleaning the burrs to avoid wire damage.
ANSWER KEY NO.: 4 / UC NO.: 1
PREPARE FOR CABLE PULLING AND INSTALLATION
1. Right-angle bend, Off-set bend, Cross-over bend, Goose-neck bend.
2. Hacksaw.
3. Rigid Steel Conduit.
4. Threading.
5. Reaming.
Program/ Course
:
Unit of Competency
:
Module
:
ELECTRICAL INSTALLATION AND MAINTENANCE
NC II
Perform Roughing-In Activities, Wiring, and Cabling
Works for Single-Phase Distribution, Power, Lighting,
and Auxiliary Systems
Performing Roughing-In Activities, Wiring, and
Cabling Works for Single-Phase Distribution, Power,
Lighting, and Auxiliary Systems
Learning Outcome No. 5: Perform Wiring and Cabling Layout
Assessment Criteria:
5.1 Safety procedures are followed based on safety regulations PPE are identified
and selected in line with safety requirements.
5.2 Tools, equipment, pulling compound and safety requirements are identified and
obtained for the lay out and installation.
5.3 Pulling materials is properly installed and tensioned to required specifications.
5.4 Cable is secured permanently to support structure in accordance with standard
installation procedures.
5.5 Bending radius and loops tolerance is observed for cable materials at all times.
5.6 Schedule of wire cutting lists is followed based on estimates, quantity and sizes
to avoid wastage.
5.7 Further instructions are sought if unplanned events or conditions occur.
5.8 Checking of quality of work is done in accordance with instructions and
requirements.
References:
 Martin, Isaac. The Complete Guide to Wiring: DIY Home electrical
Installations & Repairs with Step-By-Step Guide 2020. Isaac Martin.
 Simmons, Phil, and Mullin Ray C. Electrical Wiring – Commercial 16th Edition
2018. Cengage Learning.
 Black & Decker Home Improvement Library. Black & Decker: The Complete
Guide to Wiring Updated 7th Edition 2018. Quanto Publishing Group USA, Inc.
 Herman, Stephen L. Electrical Wiring – Industrial 15th Edition 2015. Cengage
Learning.
 Trandem, Bryan, Publisher. Black & Decker Home Improvement Library.
Black & Decker: The Complete Guide to Wiring 2011. Cengage Publishing
International.
 Home Skills. Wiring – Fix Your Own Lights, Switches, Receptacles Boxes,
Cables & More. Cool Springs Press.
 Black & Decker Home Improvement Library. Black & Decker: The Complete
Guide to Home Wiring 2001. Creative Publishing International.
 McReynolds, Ray. Step-By-Step Guide Book to Home Wiring 1st Edition1982.
Step-By-Step Guide Book, Co.
INFORMATION SHEET NO.: 5 / UC NO. 1
PERFORM WIRING AND CABLING LAYOUT
Introduction
In performing wiring and cabling layout, the shape
of the cabling layout used to link devices is called
the physical topology of the network.
This refers to the layout of cabling, the locations of
nodes, and the interconnections between the
nodes and the cabling.
Installation Methods and Wiring Techniques
The electrical wiring scope must cover installation, testing, supply and
commissioning of all accessories, wiring, switches, conduits, spur outlets, and many
more. Thus, electrical wiring needs further attention, especially for building projects.
Several factors are to be considered before doing the actual installation work
whether for commercial, residential or industrial wiring. Electrical experts should also
consider factors like wall and floor construction, installation requirements, type of
ceiling, building construction, etc.
In this session we will cover the concept of electrical wiring, including the different
wiring systems and installation methods and the basic wiring preparation. This will
serve as a guide for learners and electrical professionals in dealing with various
electrical works.
The Major Importance of Appropriate Electrical Wiring
Electrical wiring that is done inappropriately is a risk and a fire hazard. It is the major
responsibility of electricians to trace any electrical ambiguities. That is why, they
need to have a broader electrical experience, in-depth knowledge and a license to
deal with such issues. For others, wiring seems to be as simple as lights on and off.
However, there is an intricate process going on deeper than the surface that only
qualified electricians know. Connection circuits that are poorly designed are unsafe
and can damage electronic gears and appliance motors. A poorly designed
connection circuit delivers the incorrect amperage.
The process of connecting numerous accessories for the distribution of electrical
energy from the meter board to home equipment is called electrical wiring. Electrical
wiring installation can be done using two methods: Joint box or Tee system and
Loop – in the system. Both are discussed as follows:
Below are the two common installation methods for electrical wiring.
1. Joining Box or Tee System
In this installation method, connections to any appliances are prepared
through joints. The joints are made from joint boxes using appropriate
connectors and joints cutouts. This method of wiring doesn’t consume cable
sizes. Electrical experts have to take note that this installation might be
expensive in a few cases. Structure for this system will be made easier
using builder trends software. It’s a trend that must be considered by electrical
contractors.
2. Looping System
This wiring installation method is universally used in any electrical method.
Other appliances and lamps are connected in a parallel position so that every
appliance can be separately controlled. When the connection is required, the
feed conductors are being lopped in by getting it directly to the terminal and
then fetching it forward again to the next points.
The light and switch feeds are carried around the circuit by a series of loops. It
will be carried around from one point to another until the last on the circuit is
reached. The line or phase conductors are lopped either in a box or
switchboard.
For a much better understanding of the concept of wiring, below are a few
examples of the wiring circuits.
 Single bulb controlled only by a one-way switch.
In this wiring circuit, the hot wire is typically connected to one terminal
directly to the switch. The other terminal is connected directly to the
positive bulb terminal.
 Two bulbs controlled by a one-way switch.
Two bulbs are usually connected with supply wires in parallel. A
separate one-way switch will route it. This type of wiring sample is
known for its simplicity.
 Single blub controlled by two-way switches.
The wiring is termed as staircase wiring wherein a light lamp will be
controlled from two primary sources. This type of wiring is used for
bedrooms to switch on/off from two sources.
 Go-down wiring.
This type of wiring is used in long passages, tunnel-like structures and
long passages. It follows a linear sequence for switching the lights from
one end and to the others.
 Fluorescent lamp controlled by a one-way switch.
In this circuit, the phase wire is going to be connected to one end of the
switch. Yet, another end switch will be connected to the ballast (choke).
One electrode of the lamp is connected to the other neutral terminal
and choke.
 Socket outlet wiring.
The outlet passes the current and holds a plug when the power is
routed directly to the socket. The radial socket connection and a single
socket connection are present.
Basic Wiring Preparation
As we are now discussing the sequence of steps
for wiring and understanding the wiring system’s
types, other considerations like the preparation
of cables, wires, and other electrical tools are
also included. Using a crew schedule software is
also one of the important considerations needed
to
take.
Furthermore,
the
following
considerations listed below are included in the wiring preparation.
1. The specifications of the wire vary on a few factors – the insulation type, the
number of conductor strands, the cross-section area, and the strands’
diameter.
2. The type of conductor to be used can either be stranded wire or solid wire
conductor. Single solid wires are often utilized where rigid connections are
required and these wires aren’t flexible enough. Thus, stranded conductors
are mostly preferred when it comes to electrical installations.
3. Select the wires depending on the color codes that are being mentioned by
several standards like black for neutral, green for earth, red for phase wires
and so on. Electrical contractors have to know all wiring colors, whether in
cables or wires. Important tasks like this are best monitored using a task
scheduler software. This software tool guarantees an efficient way of handling
and scheduling tasks.
4. Electricians have to be selective when it comes to the components they will
have to use. When choosing for switches, receptacles, electrical boxes, or
any other elements, make sure to base it upon rating and size. Furthermore,
start wiring the components as one by following the wiring diagrams tools, and
so on.
5. Numerous basic electrical tools are mandatorily required when it comes to
installation works. Some of the tools used include strippers, cutters, pliers,
testers, etc. Additionally, electrical contractors are also considering to
use builder software for scheduling and project management purposes.
4 Basic Electrical Wiring Techniques
There are several basic wiring techniques every electrician must know about. Having
in-depth knowledge and practical experience can help experts in dealing any form of
electrical issue. Below are some of the most applied wiring techniques.
1. Casing and Capping Wiring
In this wiring type, the cable will run through a wood casing with parallel
grooves appearing at regular intervals. The case is expected to be fixed to
either walls or ceilings using screws. It will then be fully covered with a cap to
protect the wires. This system is considered to be considerably expensive, yet
there is a huge possibility of short circuit risks resulting in some fire hazards.
Electrical contractors need to trace possible hazards earlier. The best way to
handle bombarding issues is through the application of construction
scheduling software.
Listed below are the materials used for casing wiring:
 PVC or VIR insulated wires.
 Capping (wood or plastic made).
 Capping or casing joints.
 Casing enclosure (wood or plastic made)
Advantages of this type of wiring scheme are:
 Strong and durable wiring.
 Inexpensive and easy to install.
 Any wiring customization can be done.
 Safe from dust, rain, smoke and steam.
 No risk of shock due to capping and casing.
2. Cleat Wiring
Here, cables that are PVC insulated are being used. The cables will be fasted
directly to the walls using wood, porcelain or plastic cheats. Everything will be
installed at different intervals, usually 6km. apart. This wiring is affordable but
usually good enough for temporary applications. It isn’t even suitable for
residential electrical wiring.
Listed below are some of the common materials used in cleat wiring:
 Weatherproof cables.
 Lots of screws.
 PVC or VIR insulated wires.
 Plastic cleats or porcelain cleats (2-3 grooves).
This type of wiring has some advantages:
 East for detecting faults.
 Easy to repair.
 Addition and alteration is easy.
 Easy and Cheap wiring.
3. Batten Wiring
One of the most important wiring methods applied today is the batten wiring.
In this wiring, insulated wires will run through the wooden battens. The
battens are fixed on walls and ceilings using either screws or plugs. The
cables are fitted directly onto the battens. Link clips are used as well and it will
be fastened with rust-resistant nails.
Basic materials used for batten wiring are the following:
 TRS or CTS cables.
 Tinned brass buckle clip (link clip).
 Brass pins.
Advantages of this type of wiring scheme are listed below:
 Installations are way easier.
 Appearance is much better.
 Cheaper material costs.
 Easy and flexible customization.
 Lesser chances of leakage current.
4. Conduit Wiring
PVC cables are often used in conduit wiring. If the pipes are running through
the ceilings and wall surface, surface conduit wiring is the best term. On the
other hand, if pipes run inside the wall surface and it will be covered with
plastering, it is termed as concealed conduit wiring. Surface wiring is used
mainly for industrial applications in order to interlink heavy motors. Lastly,
concealed wiring is utilized for residential purposes.
 Materials used for conduit wiring:
 Metallic conduit (class A and B).
 Non-metallic conduit.
 PVC or VIR insulated cables.





Coupling.
Screws.
Rigid offset.
2-hole strap.
Locknut.
The main advantages of this wiring are the following:
 The safest wiring of all.
 No risks of mechanical wear and tear or fire.
 No risk of cable insulation damage.
 Long-lasting and no risk of shock.
Key Takeaways
If you are doing electrical works, it is crucial to be familiar with the concept of wiring,
with more in-depth understanding, knowledge and practical experience. In that way,
you can better implement any electrical works needed in the projects. Always be
reminded that electrical wiring should be installed safely and correctly by electrical
standards and regulations.
Supporting Cables
WIRING TIPS
Attaching conductors to screw type terminals:
Strip 13 mm to 19 mm of insulation from the wire.
Then, using needle nose pliers; form a three-quarter
loop in the uncovered conductor. Hook the conductor
clockwise around the screw so that as you tighten the
screw, the loop of wire will close and form a tight
connection.
Make sure the insulation on the conductor does not
extend under the screw as this will make a poor
connection.
Use of wire connectors
The most common method of connecting conductors is
to use a wire connector.
The recommended practice for making this connection
is as follows:
1. Remove the insulation to expose the ends of the
conductor in accordance with the manufacturer’s
instructions.
2. Hold stripped ends together, with ends of the
wire even.
3. Push connector firmly against the wire ends and
twist on the connector.
When
running
cables
through joists and studs, be
sure to drill the holes large
enough so the cables are not
pinched or crushed.
Metal Protectors
Use approved metal plates
in situations where the
cable is too close to the
front of the studs or joists.
SELF-CHECK NO.: 5 / UC NO.: 1
PERFORM WIRING AND CABLING LAYOUT
Instruction: Choose the correct answer and encircle the letter of your choice.
1. If this is done inappropriately there’s a greater risk of a fire hazard or risk of
injury.
A. Electrical Wiring.
B. Electrical Conductors.
C. Electrical Insulation.
D. Electrical Boxes.
2. __________ have to be selective when it comes to the components they will
have to use.
A. Masters.
B. Electricians.
C. Supervisors.
D. Management.
3. This is the most common method of connecting conductors.
A. Lead Connectors.
B. Casing Joints.
C. Wire Connectors.
D. Casing Enclosures.
4. The process of connecting numerous accessories for the distribution of
electrical energy from the meter board to home equipment.
A. Electrical Panels.
B. Electrical Wiring.
C. Electrical Enclosures.
D. Electrical Cleats.
5. This refers to the physical topology of the network.
A. Cabling Lay-ins.
B. Cabling Layouts.
C. Cabling Joints.
D. Cabling Insulations.
ANSWER KEY NO.: 5 / UC NO.: 1
PERFORM WIRING AND CABLING LAYOUT
1. A. Electrical Wiring.
2. B. Electricians.
3. C. Wire Connectors.
4. B. Electrical Wiring.
5. B. Cabling Layout.
Program/ Course
:
Unit of Competency
:
Module
:
ELECTRICAL INSTALLATION AND MAINTENANCE
NC II
Perform Roughing-In Activities, Wiring, and Cabling
Works for Single-Phase Distribution, Power, Lighting,
and Auxiliary Systems
Performing Roughing-In Activities, Wiring, and
Cabling Works for Single-Phase Distribution, Power,
Lighting, and Auxiliary Systems
Learning Outcome No. 5: Notify Completion of Work
Assessment Criteria:
6.1 Final checks are made to ensure that work conforms with instructions and job
requirements.
6.2 Supervisor is notified upon completion of work.
6.3 Tools, equipment and any surplus resources and materials are, where
appropriate, cleaned, checked and returned to storage in accordance with
established procedures.
6.4 Work area is cleaned up and made safe according to OHSA regulations.
References:
 Martin, Isaac. The Complete Guide to Wiring: DIY Home electrical
Installations & Repairs with Step-By-Step Guide 2020. Isaac Martin.
 Simmons, Phil, and Mullin Ray C. Electrical Wiring – Commercial 16th Edition
2018. Cengage Learning.
 Black & Decker Home Improvement Library. Black & Decker: The Complete
Guide to Wiring Updated 7th Edition 2018. Quanto Publishing Group USA, Inc.
 Herman, Stephen L. Electrical Wiring – Industrial 15th Edition 2015. Cengage
Learning.
 Trandem, Bryan, Publisher. Black & Decker Home Improvement Library.
Black & Decker: The Complete Guide to Wiring 2011. Cengage Publishing
International.
 Home Skills. Wiring – Fix Your Own Lights, Switches, Receptacles Boxes,
Cables & More. Cool Springs Press.
 Black & Decker Home Improvement Library. Black & Decker: The Complete
Guide to Home Wiring 2001. Creative Publishing International.
 McReynolds, Ray. Step-By-Step Guide Book to Home Wiring 1st Edition1982.
Step-By-Step Guide Book, Co.
INFORMATION SHEET NO.: 6 / UC NO. 1
NOTIFY COMPLETION OF WORK
Introduction
Preliminary testing and visual inspections shall be conducted prior to acceptance
and operational tests to avoid delays. The contractor must submit for approval; his
testing procedure for each electrical system. Tests shall be conducted by contactor
according to the approved testing procedure. All tests shall be conducted & recorded
and submitted during handing over.
Electrical acceptance tests shall be conducted to assure that electrical materials; and
their installations are in accordance with contract documents, regulatory agencies,
applicable codes and standards listed herein, and that they may be energized.
Operational tests shall be conducted to assure capability of equipment and systems
to perform as specified and designed.
Quality Assurance
Testing and testing equipment shall conform to the latest edition of reference
specifications specified herein and to applicable codes and requirements of IEC.
The Personnel engaged in the testing of electrical equipment and systems shall have
a minimum of five (5) years of continuous experience in the testing of the equipment
and systems to be tested. Submit evidence of such qualifications to the Engineer.
Contractor shall furnish testing
equipment as required. Testing
equipment,
meters
and
instruments shall have been
properly calibrated and certified
within (6) months prior to testing
and shall be in satisfactory
condition to perform its functions.
Contractor shall provide an appropriate and stable source of electrical power to the
test locations.
Perform tests in the presence of the Employer's Representative.
Electrical equipment and installation shall meet acceptance and operational tests.
Promptly repair or replace defective work and repeat the tests until the particular
system and component parts thereof receive the approval of the Engineer. Any
damages resulting from tests shall be repaired and/or damaged materials replaced,
to the satisfaction of the Engineer.
It is essential that certain trades and manufacturer's technical representatives be
present during the testing. These representatives shall include:
1. Electrical subcontractor who is thoroughly familiar with the project as to its
intent, what equipment has been provided and how it is supposed to operate.
2. Supplier of equipment particularly where packaged equipment has been
provided.
3. Manufacturer's representative who is thoroughly familiar with the operation of
the equipment.
The operation of the electrical installation by the
Employers does not constitute an acceptance of the
electrical installations. Final acceptance will depend
on Contractor's demonstration of compliance with
contract documents, completion of adjustments as
specified and required, and submission of required
documentation and certification of approval by
governing authorities.
Continuity tests shall be performed using direct current
and audible bells or buzzers. Use of telephones is not
acceptable.
Safety devices such as rubber gloves and blankets, glow detectors, hot sticks,
helmets, eye shields, protective screens and barriers, danger signs, etc. shall be
used to adequately protected and warn personnel in the vicinity of the tests.
APPLICATIONS
Equipment that can be paralleled under any conditions including interlock defeat
shall be tested for proper phasing using hot-phase hot-stick or other approved
methods. This includes, but is not limited to, primary selector switches, automatic
transfer switches, tie breakers and busses, etc. at medium and low voltage levels.
Full load currents of feeders serving single phase loads shall be measured to assure
an equal load balance on each phase. Branch circuits shall be reconnected if
necessary to achieve this balance.
Megger values specified are minimum acceptable values at an ambient temperature
of 60 degrees F and low relative humidity. Contractor shall convert readings to
equivalent values at 60 degrees F if measurements are taken under other conditions.
The phase rotation at busses, panels, switchboards, switchgear, etc., shall be
checked and verified using a phase sequence meter for consistency and conformity
to recognized standards, i.e. A-B-C left to right, top to bottom, front to back, when
facing front of the equipment, and to provide an A-B-C (1-2-3) clockwise rotation.
Where electrical installations and extensions of existing systems, or in new buildings
at existing sites, phase rotation shall conform to the existing.
TESTS
Low Voltage Wire and Cable (600 Volts and Less).
1. Wire and cable shall be tested for continuity, freedom from short circuits and
grounds and meggered to assure adequate insulation resistances for each
conductor. Test to be recorded & submitted.
2. Test Voltages: Megger instrument shall be 1000 volts DC applied for one
minute.
3. Acceptable Test Results: Insulation resistance between phase conductors
and any phase conductor to ground shall be not less than 2 megohms for
connected conductors and 100 megohms for disconnected conductors.
Motor Control Centers and Panel boards
1. Equipment shall be tested for continuity, freedom from short circuits, and
grounds and meggered to assure adequate resistances.
2. Test Voltages: Megger instrument shall be 1,000 volts DC for equipment rated
380 volts and 500 volts DC for equipment rated 220 volts, applied for one
minute.
3. Acceptable Test Results: Insulation resistance phase and any phase to
ground shall be not less than 100 megohms for equipment rated 380 volts and
25 megohms for equipment rated 220 volts.
Switchboards
1. Test electrical and mechanical interlock systems for proper operation and
sequencing.
2. Test ground connections as specified under "Earthing System”.
3. Perform ratio and polarity tests on instrument current and potential
transformers.
4. Perform insulation resistance tests on each bus section, phase to phase and
phase to ground as specified under "Motor Control Centers (MCC) & (MSPs)
(EMSPs) and all Panel boards." Prior to performing insulation resistance tests
on buswork, isolate the buswork by racking out or opening circuit breakers
and disconnects, short circuit and ground current transformer secondaires,
remove potential transformer primary fuses and assure grounding of the
enclosure.
5. Perform control wiring performance test using the approved manufacturer's
elementary diagrams.
6. For selective switchboard and switchgear arrangements, verify proper
phasing between the line and load stabs of the tie breaker cubicle busses
using hot-phase hot-stick techniques, A-A, B-B, C-C.
7. Test disconnect switches as specified under "Circuit and Motor Disconnects."
8. Perform an insulation resistance test at 1000 volts DC on each circuit breaker
for one (1) minute from pole-to-pole and from each pole-to-ground with
breaker closed and across open contacts of each phase. Insulation resistance
shall not be less than 100 megohms.
9. Set, calibrate and adjust protective device setting of each circuit breaker in
accordance with the approved coordination study using secondary current
injection.
INSPECTIONS
When your work is completed at certain stages, the wiring will need to be checked by
the electrical inspector.
Permit fees normally cover only the rough-in inspection and final inspection. If extra
inspections are required to facilitate construction schedules or remedy defects
identified by an inspector, additional inspection fees will apply.
Rough-in inspection
This inspection is made before the wiring is covered by insulation, a vapour barrier,
or wallboard.
Before calling an electrical inspector for the rough-in inspection, the following work
must be completed:
 The wiring for all lights, switches and receptacles must be installed in the
walls, secured to the structural members, and terminated in the outlet boxes.
 All the connections, joints and bonding in the outlet boxes must be completed.
Only the conductors required for the connection of the light fixtures,
receptacles or switches should be left unconnected.
Final inspection
 The electrical installation must be complete.
 The light fixtures, receptacles and switches must be installed and connected.
 The electrical circuits in the panel must be clearly identified as well.
 Finally, the cover plates for receptacles and switches must be installed.
SELF-CHECK NO.: 6 / UC NO.: 1
NOTIFY COMPLETION OF WORK
Instruction: Read the following statements carefully, and indicate your
answers on the space provided for.
1. _______________ This inspection is made before the wiring is covered by
insulation, a vapour barrier, or wallboard.
2. _______________ This shall be conducted to assure that all electrical
materials; and their installations are in accordance with contract documents,
regulatory agencies, applicable codes and standards listed herein, and that
they may be energized.
3. The _______________ shall provide an appropriate and stable source of
electrical power to the test locations.
4. _______________ specified are minimum acceptable values at an ambient
temperature of 60 degrees F and low relative humidity.
5. _______________ shall be tested for continuity, freedom from short circuits
and grounds and meggered to assure adequate insulation resistances for
each conductor.
ANSWER KEY NO.: 6 / UC NO.: 1
NOTIFY COMPLETION OF WORK
1. Rough-in Inspection.
2. Electrical Acceptance Test.
3. Contractor.
4. Megger Values.
5. Wire and Cables.
TASK SHEET NO.: 1.1
Title:
Performance
Objective:
Supplies
Materials:
Tools
Equipment:
Develop Skills in Bending Metallic Conduit
Given in bending metal conduit, you should be able to use hickey
bender on the following standard size of conduit in order to bend
properly.
/  Hack Saw.
 Hickey Bender.
/  Hockey Bender.
Bending Metallic Conduit
Steps
Procedures:
Assessment
Methods:
1. Use the rigid-sized pipe bender or hickey for each size of
conduit.
2. Make a level on the floor.
/
3. The bend must be gradual and equal to a radius 6 times the
diameter of the conduit.
4. Apply pressure on the handle of the hickey bender; depends on
the specific direction.
5. Good housekeeping and safety practices are applied in line
with job requirements.
 Demonstration with Oral Questioning.
 Role-plays.
 Direct Observation.
TO ACCESS MORE
ABOUT THE MODULE
PLS CONTACT:
09610392852