EIM10_JHS_Q2M6Week6--PASSED.pdf.10orions1

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📅 Day 1 – Introduction, EMT Basics, Importance, Rules, Sizes

Slide 1 – Title
Basic Methods and Requirements for Installation: Wiring Installation using Electrical Metallic Tubing (EMT)
TVL – Industrial Arts: Electrical Installation and Maintenance (EIM) NCII

Slide 2 – Introduction
Good day everyone! Today, we begin our report on Electrical Metallic Tubing or EMT. This module is very important because it prepares us for actual electrical installation work. EMT is one of the most commonly used conduits in electrical systems. It is included in the standards of the Philippine Electrical Code (PEC), which ensures that electrical installations are safe, reliable, and long-lasting.

By the end of this lesson, we should be able to:

Understand wiring diagrams using EMT.

Draw and interpret electrical wiring diagrams.

Install wiring devices using EMT correctly and safely.

Slide 3 – What is EMT?
Electrical Metallic Tubing, or EMT, is a type of rigid electrical conduit. It is also called “thin-wall conduit” because it is lighter and thinner compared to Rigid Metal Conduit (RMC). It is usually made of galvanized steel, though aluminum may also be used.

Despite its light weight, EMT is strong and durable. It can be bent with a tool called a conduit bender, which makes it easier to install along walls, ceilings, and floors. Unlike RMC and IMC, EMT is not threaded. Instead, it uses couplings and connectors secured with screws or compression fittings.

Common sizes of EMT include ½ inch, ¾ inch, and 1 inch. EMT is most often used for indoor exposed wiring in residential and light commercial construction. When used outdoors, watertight fittings must always be applied to prevent moisture from entering the conduit.

Slide 4 – Importance of EMT
The main purpose of EMT is to protect wires and keep electrical systems safe. Wires without conduit are vulnerable to damage, which may cause overheating, short circuits, and fire hazards. EMT prevents these problems by enclosing the wires in a protective metal pipe.

Aside from safety, EMT also keeps the wiring neat and organized. It allows electricians to pull multiple wires inside one conduit, making the system more efficient and easier to maintain. Without EMT or similar conduits, electrical installations would be messy and dangerous.

Slide 5 – PEC Rules for EMT
The Philippine Electrical Code provides clear rules on the use of EMT. While EMT is allowed in both exposed and concealed work, there are situations where EMT must not be used:

Hazardous locations where there are explosive gases, vapors, or combustible dust.

Cinder fill areas where corrosive chemicals may damage the tubing.

Locations exposed to corrosive fumes or vapors, such as tanneries, meat packing plants, and salt storage facilities.

Areas subject to heavy mechanical damage, where the tubing could easily be crushed or broken.

These restrictions remind us that safety must always come first in electrical work.

Slide 6 – Sizes and Standard Length

1. 10
TVL Industrial
Arts:
Electrical Installation
and Maintenance (EIM)
NCII
Quarter 2 – Module 6:
Basic Methods and
Requirements for Installation:
Wiring Installation using
Electrical Metallic Tubing (EMT)
(Week 6)

2. What I Need to Know

In this module, you will be trained to install wiring devices using different types of
conduit wiring according to pipe installation especially on Electrical Metallic
Tubing. This includes the Philippine Electrical Code (PEC) provisions in installing
EMT.
In this module, you are expected to:
1. understand wiring diagram using Electrical metallic tubing;
2. draw electrical wiring diagram; and
3. install wiring devices using electrical metallic tubing.

What I Know

Name: ___________________________ Grade and Section: ____________ Quarter: ___
Module Number: _____ Lesson Title: _______________________________________
A. Multiple Choice. Choose the letter of your answer and write it on a separate
sheet of paper.
1. It is used to secure EMT conduits to electrical metallic box.
A. EMT conduit C. EMT connector
B. EMT coupling D. EMT strap
2. It is used to couple two EMT pipes together, or an EMT pipe and a Rigid/IMC
pipe together.
A. EMT conduit C. EMT connector
B. EMT coupling D. EMT strap
3. Most are made of galvanized steel but can also be aluminum. It is also called
"thin-wall" conduit because it is thin and lightweight.
A. EMT conduit C. EMT connector
B. EMT coupling D. EMT strap
4. It is used to hold, secure, and support electrical metallic tubing.
A. EMT conduit C. EMT connector
B. EMT coupling D. EMT strap
5. It is a tool used to bend conduit pipes in different curves and angles.
A. Pipe cutter C. Pipe bender
B. Pipe reamer D. Pipe threader
6. A standard length of electrical metallic tubing that follows the gas pipe
A. 10 ft. B. 11 ft. C. 12 ft. D. 13 ft.
7. EMT protected with enamel should not be used on the following conditions
EXCEPT __________.

3. 2
A. subjected to mechanical during or after the construction
B. cinder fill
C. not in hazardous location
D. exposure to corrosive fumes and vapor
8. How many numbers of conductors used in ½-inch trade size conduit?
A. 8 B. 9 C. 10 D. 11
9. The minimum trade size of electrical metallic conduit
A. 1/4-inch B. 1/2-inch C. 3/4-inch D. 1 inch
10. It is the size of conduit that can accommodate a maximum of 10 wires using
number 12 AWG.
A. 3/8 B. 1/2 C. 3/4 D. 1 ¼
11. To bend a conduit in 90 degrees, what is the take up on a 1/2 EMT bender?
A. 5 inches B. 6 inches C. 7 inches D. 8 inches
12. It refers to the removal of sharp edges at the end of the pipe.
A. Cutting B. Splicing C. Reaming D. Cleaning
13. It is a tool used to remove burrs inside the pipe.
A. Pipe cutter C. Pipe bender
B. Pipe reamer D. Pipe threader
14. The maximum size of the diameter of electrical metallic conduit.
A. 4 inches B. 5 inches C. 6 inches D. 7 inches
15. To bend a conduit in 90 degrees, what is the take up on a 3/4 EMT bender?
A. 5 inches B. 6 inches C. 7 inches D. 8 inches

What’s New

A rigid metal conduit served the same purpose as
with the Electrical Metallic Tubing. They are
designed to protect the electrical wiring of buildings
from electrical hazards due to faulty wiring. It is
usually installed buried in the concrete wall, floor,
and ceiling, in masonry or similar materials. It is
also used for exposed and concealed works; it
provides maximum protection due to mechanical
damage. In order that this wiring method will
become effective, safe, and reliable, it is a must that
it should follow the PEC standard and
specifications.
https://www.shutterstock.com/search/electrical+conduits

4. 3



What is It

Electrical Metallic Tubing—EMT
Another example of a rigid electrical conduit is an EMT (electrical metal tubing),
which is mostly made of galvanized steel but can also be aluminum. EMT is also
called "thin-wall" conduit because it is thin and lightweight, especially compared to
RMC. EMT is rigid but can be bent with a simple tool called a conduit bender.
EMT is installed with couplings and fittings that are secured with set screw or
compression-type fasteners. The tubing itself is not threaded like RMC and IMC.
Common sizes of EMT include 1/2-inch, 3/4-inch, and 1-inch. It is commonly used
for exposed indoor wiring that is run in residential and light commercial
construction. If installed outdoors in exposed locations, it must be assembled with
special watertight fittings.
A rigid metal conduit is a type of wiring installation which is designed to lessen or
eliminate fire hazard and electrical accidents. The following rules and regulations on
the use of electrical metallic tubing should be observed:
A. Application
Electrical metallic tubing may be used for exposed and concealed work at the same
condition with rigid metal conduit. EMT protected with enamel should not be used
on the following conditions:
a. subjected to mechanical during or after the construction
b. Cinder fill
c. hazardous location
d. exposure to corrosive fumes and vapor
B. Sizes
Electrical metallic tubing has a smooth surface inside diameter. Its standard length
follows the gas pipe which is 10 ft. and a diameter from ½ inch, ¾ inch up to 6
inches.
C. Location of some corrosive fumes and vapor
a. meat packing plant
b. tanneries
c. salt storage plant

5. 4
D. Under wet location
Electrical metallic tubing can be used provided the water is prevented from entering
the conduit. The support, straps and other fitting must be approved for the purpose.
E. Bending
The first thing you need to learn before bending a 90. EMT Take Up is an amount of
conduit length used to figure out where to place the marks on the conduit before the
bend. Most hand benders have the take up stamped on the bender or on a sticker –
usually on the bender handle.

Take up:

● For 1/2 inch EMT conduit, subtract 5”
from the stub length of the conduit.
● For 3/4 inch EMT conduit, subtract 6”
from the stub length of the conduit.
● For 1 inch EMT conduit subtract 5” from
the stub length of the conduit.
STUB is the length you need for the conduit to reach and is measured from the back
of the bend or backside of the conduit.
https://electricianapprenticehq.com/how-to-bend-a-90-degree/
E. Number of conductors in tubing
The number of conductors for every single run of EMT should follow the given
Table.

Trade size of conduit
(inches)
Size in AWG No. Of conductors
3/8” 16 8
1/2” 14 8
3/4” 12 10
1” 6 12
1 1/2” 2 12

6. 5
Materials used for the installation of EMT
1. EMT connectors are used to secure EMT conduits to electrical metallic box.




https://www.yinlei.com/product/EMT -CONNECTORS -SET-SCREW-TYPE-STEEL.html
2. EMT couplings are used to couple two EMT pipes together, or an EMT pipe
and a Rigid/IMC pipe together.



https://www.yinlei.com/product/EMT -COUPLING-SET-SCREW-TYPE-ALUMINUM.html
3. EMT metal strap is used to hold, secure and support electrical metallic
tubing.


EMT single-hole strap EMT double-hole
strap
https://www.amazon.com/uxcell-Zinc-Plated-Reinforced-Various-Surfaces/dp/B07TR4TPDS
4. EMT Conduit pipe




http://m.elecmanelectric.com/ansi-electrical-conduits/emt-imc-rsc-conduits/emt-conduit.html

7. 6
5. EMT boxes

Square junction box (4 inches x 4
inches






Utility metal box (2inches x 4 inches)

Octagonal metal box (4 inches x 2⅛
inches)




EMT conduit bodies/ junction boxes
A. Type T EMT rigid
B. Type TB EMT rigid
C. Type LR EMT rigid
D. Type C EMT rigid
A B C D
https://hztimes.en.made-in-china.com/product/hvGnWacJITVH/China -1-1-8-Deep-4-Octagonal-
EMT-Conduit-Boxes.html


What’s More

Install wiring using Electrical metallic tubing (EMT)
Instructions: Given the illustration of a Line diagram of First bulb controlled by a
single pole switch, second bulb controlled by two 3-way switches and all devices
connected to the load are GFCI protected.
Draw a schematic diagram in figure B, the actual wiring diagram in figure C and
Pictorial diagram in figure D.

8. 7
Line diagram









Figure A
Schematic diagram









Figure B
Actual Wiring Diagram



Figure C

Pictorial Diagram



Figure D




Assessment
Name: ___________________________ Grade and Section: ____________ Quarter: ___
Module Number: _____ Lesson Title: _______________________________________
A. Multiple Choice. Choose the letter of your answer and write it on a separate
sheet of paper.
1. Standard length of electrical metallic tubing that follows the gas pipe
A. 10 ft. B. 11 ft. C. 12 ft. D. 13 ft.
2. It is a tool used to bend conduit pipes in different curves and angles.
A. Pipe cutter B. Pipe reamer C. Pipe bender D. Pipe threader
3. It is used to secure EMT conduits to electrical metallic box.
A. EMT conduit B. EMT coupling C. EMT connector D. EMT strap
4. It is used to couple two EMT pipes together, or an EMT pipe and a Rigid/IMC

GFCI S1 A S3 B S3 B
Circuit
Breaker

A B

9. 8
pipe together.
A. EMT conduit B. EMT coupling C. EMT connector D. EMT strap
5. Most are made of galvanized steel but can also be aluminum. It is also called
"thin-wall" conduit because it is thin and lightweight.
A. EMT conduit B. EMT coupling C. EMT connector D. EMT strap
6. It is used to hold, secure, and support electrical metallic tubing.
A. EMT conduit B. EMT coupling C. EMT connector D. EMT strap
7. It is the size of conduit which can accommodate a maximum of 10 wires AWG
A. 3/8 B. 1/2 C. 3/4 D. 1 ¼
8. EMT protected with enamel should not be used on the following conditions
EXCEPT __________.
A. subjected to mechanical during or after the construction
B. not in hazardous location
C. cinder fill
D. exposure to corrosive fumes and vapor
9. How many numbers of conductors used in 1/2-inch trade size conduit?
A. 8 B. 9 C. 10 D. 11
10. The minimum trade size of electrical metallic conduit.
A. 1/8-inch B. 1/4-inch C. 1/2-inch D. 3/4 inch
11. It refers to the removal of sharp edges at the end of the pipe.
A. Cutting B. Splicing C. Reaming D. Cleaning
12. To bend a conduit in 90 degrees, what is the take up on a 1/2 EMT bender?
A. 5 inches B. 6 inches C. 7 inches D. 8 inches
13. It is a tool used to remove burrs inside the pipe.
A. Pipe cutter C. Pipe bender
B. Pipe reamer D. Pipe threader
14. To bend a conduit in 90 degrees, what is the take up on a 3/4 EMT bender?
A. 5 inches B. 6 inches C. 7 inches D. 8 inches
15. The maximum size of the diameter of electrical metallic conduit.
A. 4 inches B. 5 inches C. 6 inches D. 7 inches

Additional Activities

Name: ___________________________ Grade and Section: ____________ Quarter: ___
Module Number: _____ Lesson Title: _______________________________________
Instructions: Given the layout of line diagram of “first bulb controlled by a single
pole switch, second bulb controlled by two 3-way switches and all devices
connected to the load are not GFCI protected.
Draw a schematic diagram in figure B, line diagram in figure C and the actual wiring
diagram in figure D on a long size bond paper. Then check your work by looking at
the answer key at the end of this module. (The light and switch are not protected by
the GFCI).

10. 9
Figure A











Answer Key
What’s More
Schematic diagram





Pictorial Diagram






GFCI S1 A S3 B S3 B
Circuit
Breaker

A B



GFCI S1 S3 S3

11. 10
Actual wiring diagram

Additional Activities
Schematic diagram





Pictorial Diagram





Actual wiring diagram





1 1
3 3
0
0

GFCI S1
A B
S3W S3W

GFCI S1 S3 S3

A B
S3W S3W
S1
1 1
3 3
0
0

12. 11
References
Department of Education Learner’s Material, first edition 2014
Copyright Department of Education 2008, First Published JUNE 2008

https://www.thebalancesmb.com/seven -types-of-electrical-conduits-844832,
retrieved on October 22, 2020
https://www.do-it-yourself-help.com/gfci-outlet-wiring-diagrams.html, retrieved on
October 22, 2020

https://hztimes.en.made-in-china.com/product/hvGnWacJITVH/China -1-1-8-
Deep-4-Octagonal-EMT-Conduit-Boxes.html, retrieved on October 22, 2020

https://www.yinlei.com/product/EMT-CONNECTORS -SET-SCREW-TYPE-
STEEL.html, retrieved on October 22, 2020

https://www.amazon.com/uxcell-Zinc-Plated-Reinforced-Various-
Surfaces/dp/B07TR4TPDS , retrieved on October 22, 2020

http://m.elecmanelectric.com/ansi-electrical-conduits/emt-imc-rsc-conduits/emt-
conduit.html, retrieved on October 22, 2020

https://www.yinlei.com/product/EMT-COUPLING-SET-SCREW-TYPE-
ALUMINUM.html, retrieved on October 22, 2020

https://www.shutterstock.com/search/electrical+conduits, retrieved on October
22, 2020
https://electricianapprenticehq.com/how-to-bend-a-90-degree/