Name:__________ Year & sec.
:_____________
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TLE/EIM 10
Quarter 4 – Module 6
Installing Wiring Devices for Floor and
Ground Fault Current Interrupting Outlet
Writer : ELIEZER C. CABALIDA
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TLE / EIM - G10 Quarter 4 Module 6
Learning Objective/s
INSTALLING WIRING DEVICES FOR FLOOR
Learning Outcome –
AND GROUND FAULT CURRENT INTERRUPTING OUTLET
Sub Learning Outcome- Ground Fault Circuit Interrupter (GFCI)
(TLE_IAEI9-12WD-IIIa-IVIj-2)
Lesson Proper
Ground Fault Circuit Interrupter (GFCI) Information
Outdoor receptacles as well as those in the kitchens, bathrooms, and
anywhere else near water should be the ground fault circuit interrupting
type (GFCI).
A GFCI is a ground fault circuit interrupter. It is a modestly priced
electrical device when installed in residential electrical circuits. Two-thirds
of about 300 electrocutions happening each year in and around
the home could have been avoided with this GFCI device.
The GFCI is designed to guard people and pets from severe and
sometimes fatal electrical shock. A GFCI detects ground faults and
interrupts the flow of electric current. Picture a hair dryer (blow dryer) that
is accidentally knocked off of a bathroom counter and into a bathtub filled
with water. The GFCI will stop the flow of electricity - within milliseconds -
of the hair dryer hitting the surface of the water. If someone was in the bath
tub, a painful shock may still be felt but the GFCI will prevent the
electrocution or serious injury.
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. How a Ground Fault Circuit Interrupter Works
The GFCI continually measures electricity flowing within a circuit to
detect any loss of current. If the current passing through the circuit
fluctuates a minute amount from that returning (to complete the circuit),
the GFCI instantaneously switches the power off to the affected circuit. The
GFCI interrupts power within milliseconds to prevent a lethal dose of
electricity.
A Classic Example of the GFCI at Work
Your toaster is old and has a loose bare wire inside it touching the
outer metal housing. If the toaster is plugged in, the housing is charged with
electricity. You are cleaning the kitchen and moving counter top items
around. When you touch the toaster housing with one hand while the other
hand is touching a grounded metal object, like
a kitchen faucet, you will receive a life-threatening shock! If the toaster
was plugged into a GFCI protected outlet, the power would have been turned
off before a fatal shock was delivered through your body.
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Types of Ground Fault Circuit Interrupters
Receptacle GFCI. This GFCI is used in place of a regular wall outlet
or "duplex receptacle". This GFCI is normally found throughout the house in
places like bathrooms, kitchens, garages, outdoor areas and other locations
where damp conditions do or could exist.
The receptacle GFCI fits into the standard outlet box and protects you
against ground faults when an electrical product is connected to the GFCI
protected outlet. Modern homes use receptacle-type GFCls that protect other
electrical outlets connected on the branch circuit.
Temporary/Portable GFCI. When permanent GFCls are not practical,
temporary GFCls are used. Temporary GFCIs contain the GFCI circuitry in
an enclosure with plug prongs at the back and receptacle plugs in front. It
can be plugged into an unprotected outlet, then the electrical
appliance/device is plugged into the temporary GFCI. Portable GFCIs is
simply an extension cord combined with a GFCI. It adds flexibility in using
receptacles that are not protected by GFCls. Extension cords with GFCI
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protection incorporated are great for use when permanent or portable GFCI
protection is unavailable.
Circuit Breaker GFCI: Residences equipped with circuit breakers can
have circuit breaker GFCI protection installed in the panel box to give
protection for specific circuits. The circuit breaker GFCI serves two
functions. The circuit breaker GFCI will shut off power to the circuit in the
instance of a ground fault plus the GFCI protected circuit breaker will turn
power off if a short circuit or overload is detected.
Analysis:
Directions: Write your answer to the space provided for.
1. How a Ground Fault Circuit Interrupter Works
___________________________________________________________________________
___________________________________________________________________________
_________________________________________________________________________
2. What is the tripping time of a GFCI?
3. What particular area in our home, we should install GFCI?
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
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Performance Activity: Directions: Label the different types of
Ground Fault Circuit Interrupter. to
the space provided for.
[Type a quote from the document or the summary of an interesting point. You can position the text box
anywhere in the document. Use the Drawing Tools tab to change the formatting of the pull quote text box.]
1. _________________ 2. ____________________ 3. ______________________
Assessment
Choose the letter of the best answer. Encircle the letter of the correct answer.
1.How many percent of about 300 electrocutions happening each year in and
around the home could have been avoided with this GFCI device.
A. One-fourth B. One-half C. Two-thirds D. None of the above
2. What is the tripping time Ground Fault Circuit Interrupter ?
A. an hour B. One day C. milli seconds D.10 minutes
3. What types of GFCIs that contain the GFCI circuitry in an enclosure with plug
prongs at the back and receptacle plugs in front. It can be plugged into an
unprotected outlet, then the electrical appliance/device is plugged into the
temporary GFCI. This GFCIs is simply an extension cord combined with a GFCI ?
A. Temporary/Portable B. Receptacle C. Circuit Breaker D. None of the above
4. A GFCI that give protection for specific circuits. It will serve two functions.
The circuit breaker GFCI will shut off power to the circuit in the instance of
a ground fault plus the GFCI protected circuit breaker will turn power off if
a short circuit or overload is detected.
A. Temporary/Portable B. Receptacle C. Circuit Breaker D. None of the above
5. This GFCI is normally found throughout the house in places like
bathrooms, kitchens, garages, outdoor areas and other locations where
damp conditions do or could exist.
A. Temporary/Portable B. Receptacle C. Circuit Breaker D. None of the above
