Questions and Answers
______ conductors are the conductors from the service point to the service disconnecting means.
service conductors
______ conductors are all circuit conductors between the service equipment and the final branch-circuit overcurrent device.
feeder
The _____ is that portion of the electrical circuit between the last overcurrent device and the outlets or utilization equipment.
branch circuit
A(n) _____ load is a load where the waveform of the steady-state current does not follow the wave shape of the applied voltage.
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In general, the grounded conductor of a branch circuit shall be identified by a continuous white or _____ outer finish.
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Branch circuits with not over 120 V between conductors are permitted to supply auxiliary equipment of electric-discharge lamps.
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A GFCI receptacle or circuit breaker is set to trip at 10 mA.
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For an area to qualify as a bathroom, a ____ shall be present.
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In dwelling units, a GFCI-protected receptacle is required when located within ____ ' from the inside edge of the bowl on the sink.
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All 125 V, 15 A and 20 A receptacles installed in the dwelling bathroom shall be GFCI.
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All receptacles which serve countertops in dwelling kitchens shall be GFCI.
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Branch-circuit conductors shall be ____ AWG or larger.
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Receptacle outlets installed in a dwelling for specific appliances shall be located within _____ ' of the appliance.
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The required dwelling unit outdoor receptacles shall be not more than ____ above finished grade level.
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At least one receptacle outlet shall be installed in ____' or longer hallways of dwelling units.
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The required 125 V, 1 Ø, 15 A or 20 A receptacle on rooftops for heating, air-conditioning, and refrigeration servicing shall be within ____' of the equipment.
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A wall switch shall be provided at each floor level for a lighting outlet installed in an interior dwelling stairway with ____ or more risers between floors.
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_____ is the ratio of the maximum demand of a system, or part of a system, to the total connected load of a system or the part of the system under consideration.
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The main concern in ___ branch circuits is that the neutral shall never be opened while the circuit is energized.
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Branch-circuit EGCs smaller than 4 AWG shall have a continuous outer finish that is either green or green with one or more _____ stripes unless it is bare.
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All conductors of a(n) ____ branch circuit shall originate from the same panel board.
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A current flow of ____ mA will most likely cause the heart to stop pumping.
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All receptacles in dwelling unit crawl spaces at or below grade shall be GFCI-protected.
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No point along the wall line for a dwelling unit countertop shall be more than 48" from a receptacle outlet.
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At least one receptacle outlet shall be installed within 36" of the outside edge of each bathroom basin in all dwelling units.
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Study Notes
Conductors
- Service conductors connect the service point to the service disconnecting means.
- Feeders are circuit conductors between service equipment and the final branch-circuit overcurrent device.
- Branch circuits are the segments of electrical circuits between the last overcurrent device and outlets or utilization equipment.
Load Types
- A nonlinear load has a current waveform that does not conform to the applied voltage's wave shape.
Grounding and Identification
- Grounded conductors in branch circuits are identified by a continuous white or grey outer finish.
GFCI Requirements
- Branch circuits under 120 V can supply equipment for electric-discharge lamps.
- GFCI receptacles or circuit breakers typically trip at higher than 10mA.
- GFCI-protected receptacles are required near sinks within 6 feet.
Bathroom Specifications
- A basin must be present for an area to qualify as a bathroom.
- All 125 V, 15 A, and 20 A receptacles in bathrooms must be GFCI protected.
Kitchen and Outdoor Receptacles
- Countertop receptacles in kitchens require GFCI protection.
- Outdoor receptacles in dwelling units must be positioned no more than 6 feet, 6 inches above finished grade.
Hallways and Equipment
- Hallways in dwelling units longer than 10 feet require at least one receptacle outlet.
- Rooftop receptacles for HVAC servicing should be within 25 feet of the equipment.
Stairway Lighting
- A wall switch must be provided at each floor level for stairways with 6 or more risers.
Circuit Characteristics
- The demand factor is the ratio of maximum system demand to total connected load.
- In multiwire branch circuits, the neutral must never be opened while energized.
Grounding and Conductors
- Multiwire branch circuit conductors must originate from the same panel board.
- EGCs (Equipment Grounding Conductors) smaller than 4 AWG must have an outer finish that is either green or green with yellow stripes unless bare.
Safety Statistics
- A 100 mA current flow is lethal and can lead to heart stoppage.
Additional GFCI Requirements
- GFCI protection is mandatory for all receptacles in dwelling unit crawl spaces below grade.
- No countertop in a dwelling unit should exceed 48 inches from a receptacle outlet.
Receptacle Placement
- At least one receptacle must be within 36 inches of the outer edge of each bathroom basin in dwelling units.
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Description
Test your knowledge of Chapter 2 of the National Electrical Code (NEC) with these review questions. This quiz focuses on key definitions and concepts related to service conductors and feeders. Perfect for students and professionals looking to reinforce their understanding of electrical systems.
