NEC Unit 3
List the appliances rated at 150V or less to ground and 60A or less, single-or 3-phase, that require GFCI protection for personnel.
1. Automotive vacuum machines 2. Drinking water coolers 3. Cord and plug connected high-pressure sprayers 4. Tire inflation machines 5. Vending machines 6. Sump pumps 7. Dishwashers 422.5(A)(1-7)
When a GFCI receptacle is purchased there are labels included in the packaging (Box) as well as instructions. What two statements are indicated on the labels (stickers) that are in the box?
1. GFCI protect 2. No equipment ground
What locations shall one or more readily accessible and listed GFCI devices for appliances be located?
1. Within the branch circuit overcurrent device 2. A device or outlet within the supply circuit 3. An integral part of the attachment plug 4. Within the supply cord not more than 12in from the plug 5. Factory installed within the appliance 422.10
Which appliances require GFCI protection for the branch circuit or outlet-rated ______________________________ and ____________________________________
150V or less to ground 60 A or less, single or three phase. 210.8(D)(1-12) 1. Automotive vacuum machines 2. Drinking water, cookers and bottle fill stations 3. Highly pressure spray washing machines 4. Tire inflation machines 5. Vending machines 6. Sump Pump 7. Dishwashers 8. Electric ranges 9. wall mounted ovens 10. counter-mounted cooking units 11. Clothes Dryer 12. Microwave Ovens
According to UL standard _________ Class A GFCI devises will trip when ___________ of leakage current is detected to ground.
943C, 4-6mA 100 info note
What is a GFCI?
A device intended. for the protection of personnel that functions to de-energize a circuit or portion thereof within an established time period.
Define dry location.
A location not normally subject to dampness or wetness. 100
Define wet location.
A location that is one or more of the following: exposed to weather, underground, subject to saturation of liquids, in concrete slabs. 100
All ________________________________________________________________ receptacles in NEC section _________ installed in locations that are not in a dwelling unit (other than dwellings), shall have ground-fault circuit-interrupter protection for personnel
All 125V-250V Receptacle single phase 150V to ground 50A or less 3 phase 150V to ground or less 100A or less 210.8(B)(1)
Which receptacles require ground- fault circuit interrupter protection for personnel around a sink of a non-dwelling?
All 125V-250V Receptacle single phase 150V to ground 50A or less 3 phase 150V to ground or less 100A or less and for cord plug appliances within 6 feet from top inside edge of the bowl of sink. 210.8 (B)(7), 210.8(B) Exp 3 and 4
Which receptacles require ground-fault circuit interrupter protection for personnel in non-dwelling areas with aquariums, bait wells, and similar open aquatic vessels or containers, such as tanks or bowls?
All 125V-250V Receptacle single phase 150V to ground 50A or less 3 phase 150V to ground or less 100A or less within 6 feet of the outer edge. 210.8(B)(13)
Which receptacles require ground- fault circuit interrupter protection for personnel that are located in garages, service bays, and similar in a non-dwelling?
All 125V-250V Receptacle single phase 150V to ground 50A or less 3 phase 150V to ground or less 100A or less. 210(B)(10)
Which receptacles require ground-fault circuit interrupter protection for personnel that are located in crawl spaces of a non-dwelling?
All 125V-250V Receptacle single phase 150V to ground 50A or less 3 phase 150V to ground or less 100A or less. 210(B)(11)
Which receptacles require ground- fault circuit interrupter protection for personnel in non-dwelling kitchens.
All 125V-250V Receptacle single phase 150V to ground 50A or less 3 phase 150V to ground or less 100A or less. 210(B)(2)
Which receptacles require ground- fault circuit interrupter protection for personnel in non-dwelling areas with sinks and permanent provisions for food preparation, or cooking?
All 125V-250V Receptacle single phase 150V to ground 50A or less 3 phase 150V to ground or less 100A or less. 210(B)(3)
Which receptacles require ground- fault circuit interrupter protection for personnel in non-dwelling of buffet serving areas with permanent provisions for food serving, beverage serving, or cooking?
All 125V-250V Receptacle single phase 150V to ground 50A or less 3 phase 150V to ground or less 100A or less. 210(B)(4)
Which receptacles require ground- fault circuit interrupter protection for personnel on rooftops.
All 125V-250V Receptacle single phase 150V to ground 50A or less 3 phase 150V to ground or less 100A or less. 210(B)(5) Exp1
Which receptacles require ground- fault circuit interrupter protection for personnel outdoors of a non-dwelling?
All 125V-250V Receptacle single phase 150V to ground 50A or less 3 phase 150V to ground or less 100A or less. 210(B)(6) Exp1
Which receptacles require ground- fault circuit interrupter protection for personnel located in an indoor damp and wet location of a non-dwelling?
All 125V-250V Receptacle single phase 150V to ground 50A or less 3 phase 150V to ground or less 100A or less. 210(B)(8)
Which receptacles require ground- fault circuit interrupter protection for personnel in locker rooms with associated shower facilities of a non-dwelling?
All 125V-250V Receptacle single phase 150V to ground 50A or less 3 phase 150V to ground or less 100A or less. 210(B)(9)
Which receptacles require ground-fault circuit interrupter protection for personnel that are located in laundry of a non-dwelling?
All 125V-250V Receptacle single phase 150V to ground 50A or less 3 phase 150V to ground or less 100A or less. 210.8 (B)(14)
Which receptacles require ground-fault circuit interrupter protection for personnel that are located at bathtubs and shower stall of a non-dwelling?
All 125V-250V Receptacle single phase 150V to ground 50A or less 3 phase 150V to ground or less 100A or less. 210.8 (B)(15)
Which receptacles require ground- fault circuit interrupter protection for personnel in non-dwelling bathrooms.
All 125V-250V Receptacle single phase 150V to ground 50A or less 3 phase 150V to ground or less 100A or less. 210.8(B)
Which receptacles require ground-fault circuit interrupter protection for personnel that are located in unfinished areas of basements of a non-dwelling?
All 125V-250V Receptacle single phase 150V to ground 50A or less 3 phase 150V to ground or less 100A or less. 210.8(B)(12)
Which receptacles are required to have GFCI protection for personnel in dwelling unit bathrooms?
All 125V-250V receptacles supplied by single phase 150V or less to ground 210.8(A) (1)
Which receptacles are required to have GFCI protection for personnel in indoor wet or damp locations?
All 125V-250V receptacles supplied by single phase 150V or less to the ground 210.8 (A) (11)
Which receptacles are required to have GFCI protection for personnel in a dwelling unit crawl space?
All 125V-250V receptacles supplied by single phase 150V or less to the ground 210.8 (A) (4)
Which receptacles are required to have GFCI protection for personnel in a dwelling unit basement?
All 125V-250V receptacles supplied by single phase 150V or less to the ground 210.8 (A) (5)
Which receptacles are required to have GFCI protection for personnel in a dwelling unit kitchen?
All 125V-250V receptacles supplied by single phase 150V or less to the ground 210.8 (A) (7)
Which receptacles are required to have GFCI protection for personnel in boat houses?
All 125V-250V receptacles supplied by single phase 150V or less to the ground 210.8 (A) (9)
Which receptacles are required to have GFCI protection for personnel in a dwelling unit accessory building?
All 125V-250V receptacles supplied by single phase 150V or less to the ground except for those supplying low voltage security systems 210.8(A)(2) exp.2
Which receptacles are required to have GFCI protection for personnel in a dwelling unit garage?
All 125V-250V receptacles supplied by single phase 150V or less to the ground except for those supplying low voltage security systems 210.8(A)(2) exp.2
Which receptacles are required to have GFCI protection for personnel outside of a dwelling unit?
All 125V-250V receptacles supplied by single phase 150V or less to the ground except receptacles that are not readily accessible supplying deicing equipment 210.8(A)(3) exp.2
Which receptacles are required to have GFCI protection for personnel around sinks in dwelling units?
All 125V-250V receptacles supplied by single phase 150V or less to the ground within 6ft of the closest outer edge of the sink. 210.8 (A) (8)
Which receptacles are required to have GFCI protection for personnel around dwelling units bathtubs and shower stalls?
All 125V-250V receptacles supplied by single phase 150V or less to the ground within 6ft of the closest outer edge. 210.8 (A) (10)
ALL _______________________________ receptacles installed in the dwelling unit locations specified in NEC section ____________ shall have GFCI protection for personnel, and shall be installed in a ________________________ location.
All 125V-250V, 210.8 (A), readily accessible
During what activities are temporary receptacles installations required to have class A GFCI protection?
All temporary wiring installations 590.6
What is a bathroom?
An area including a sink with one or more of the following: a toilet, a urinal, a tub, a shower, a bidet, or similar plumbing fixtures 100
What is a kitchen?
An area with a sink and permanent provisions for food preparation and cooking. 100
All 120-volt, single phase 10-,15-, and 20-ampere ________________ supplying _________ or ______________ in the following dwelling unit locations shall be protected by listed arc-fault circuit-interrupter, _________________ type, installed to provide protection of the ________________ branch circuit.
Branch circuits outlets devices combination entire 1. Kitchen 2. Family room 3. Dining room 4. Living Room 5. Parlors 6. libraries 7. Dens 8. Bedrooms 9. Sunrooms 10. recreation rooms 11. closets 12. Hallways 13. laundry areas or 14. similar areas 210.12 (A)(1), 210.12(B)
What is a GFCI end-of-life provision?
Deny power with the inability to reset. The GFCI cannot pass its internal test, indicating that it may not be able to provide protection in the event of a ground fault.
What does the term "COMBINATION TYPE" mean when referring to Combination Type AFCI Breakers?
Detects series and parallel arch faults
Define Arc-fault circuit interrupter
Device intended to de-energize the circuit when it detects current wave form characteristics unique to arcing fault Article 100 Definitions
Which receptacles require GFCI protection in 210.63?
Equipment requiring servicing 210.63
True or False: Single pole, 3 way, and 4 way general use snap switches are examples of outlets.
False
True or False: receptacles shall be permitted to be installed within or directly over a bathtub or shower stall.
False 406.9(C)
An AFCI provides ________________ protection
Fire
List the three main types of class A GFCIs
GFCI Breaker GFCI Receptacle Portable GFCI/cord set GFCI
Which crawl space lighting outlets require ground-fault circuit-interrupter protection for personnel?
GFCI Protection shall be provided for lighting outlets not exceeding 120 V in crawl spaces 210.8(C)
What is a GFPE?
Ground-fault protection of equipment (GFPE) a system intended to provide protection of equipment from damaging line-to-ground-fault currents by operating to cause a disconnecting means to open all ungrounded conductors of the faulted circuit.
When wiring a class, A GFCI receptacle power is connected to the input which is referred to as the _______ and other outlets can be GFCI protected by connecting them to the output which is referred to as the _______
Line, Load
Define damp location.
Locations protected from weather and not subject to saturation with water or other liquid but subject to moderate moisture. 100
Will a class A GFCI protect against "HOT" to "Neutral" faults (ungrounded to grounded)
No
Does a receptacle for a dwelling unit security system require GFCI protection?
No, 210.8 exp.2
Does a class AGFCI require a grounding conductor to operate properly?
No, it measures the difference in current between the hot and neutral.
Does a bathroom exhaust fan require GFCI protection in a dwelling unit?
No, unless the installation instructions require it. 210.8(A) exp.4
Would a 240 Volt 40 Amp outdoor heat pump unit require GFCI protection for personnel?
Not until September 1st 2026 210.8 (F) exp. 2
Define "Outlet" and give examples of outlets commonly found in a dwelling unit.
Point on wiring system where current is taken to supply current. Examples: receptacle outlet, fan outlet, smoke alarm outlet, light outlet Article 100 Definitions
A class A GFCI provides __________ protection
Shock
For the purposes of 210.8 the distance from receptacles, the distance shall be measured as the _________ the power supply cord connected to the receptacle would follow without piercing ______________________________________________________________ .
Shortest path, floor, wall, ceiling, or fixed barrier
What is a SPGFCI
Special Purpose Ground-Fault Circuit Interrupter (SPGFCI) a device used in circuits with voltage to ground greater than 150 volts that detects ground-fault currents, and functions to de-energize a circuit or portion of a circuit within an established period of time when a ground-fault current is detected that exceeds the values established for Class C, D, or E devices. 100
Why do excessively long runs of conductors and extension cords result in nuisance tripping of GFCIs?
The Copper loss of long runs results in a leakage of current that exceeds the 4-6mA required to trip a GFCI
What is a GFCI Reverse line-load miswire?
The GFCI is miswired due to the reversal of the LINE and LOAD leads. The GFCI cannot pass its internal test, indicating that it may not be able to provide protection in the event of a ground fault, denying power with the inability to reset until properly wired.
True or False: Dual purpose AFCI/GFCI breakers are now available and provide Combination AFCI protection and class A GFCI protection.
True
True or False: Single pole, 3 way, and 4 way general use snap switches are examples of devices?
True
15- and 20-, 125V and 250V receptacles installed in a wet location shall have an enclosure that is ______________________.
Weather proof when open or closed 406.9(B)(1)
A receptacle installed outdoors in a location protected from weather or in other damp locations shall have an enclosure for the receptacle that is:________________________.
Weatherproof when closed 406.9(A)
Would a portable GFCI or Cord set meet the article 590 requirements?
Yes
What can be used to replace a non- grounding type receptacle in a dwelling unit bedroom?
a-Non grounding type receptacle b- GFCI receptacle no equipment ground c- Grounding type receptacle supplied by GCFI marked GFCI protected and no equipment ground. 406.4 (D)(2)(a)(b)(c)
What can be used to replace a non-grounding type receptacle in a dwelling unit living room?
a-Non grounding type receptacle b- GFCI receptacle no equipment ground c- Grounding type receptacle supplied by GCFI marked GFCI protected and no equipment ground. 406.4 (D)(2)(a)(b)(c)
What can be used to replace a non-grounding type receptacle in a dwelling unit bathroom.
b- GFCI receptacle no equipment ground c- Grounding type receptacle supplied by GCFI marked GFCI protected and no equipment ground. 406.4 (D)(2)(a)(b)
What can be used to replace a non-grounding type receptacle serving a dwelling unit kitchen countertop?
b- GFCI receptacle no equipment ground c- Grounding type receptacle supplied by GCFI marked GFCI protected and no equipment ground. 406.4 (D)(2)(a)(b)
An outlet hood of an enclosure for a 15A and 20A, 125V and 250V receptacle installed in a wet location shall be listed and shall be identified as: _______________________
extra duty 406.9(B) (1)
All 15A and 20A, 125V and 250V non-locking receptacles installed in a damp or wet location shall be listed _____________.
weather resistant
