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Questions and Answers
Flexible cords are permitted to be run through holes in walls, structural ceilings, suspended or dropped ceilings or floors.
Flexible cords are permitted to be run through holes in walls, structural ceilings, suspended or dropped ceilings or floors.
False (B)
The total rating of a cord and plug connected room air conditioner must not exceed _____ of the rating of a branch circuit where lighting outlets, other appliances, or general use receptacles are also supplied.
The total rating of a cord and plug connected room air conditioner must not exceed _____ of the rating of a branch circuit where lighting outlets, other appliances, or general use receptacles are also supplied.
50%
Except for storable pools, fixed or stationary equipment other than an underwater luminaire cord must not exceed ____ in length.
Except for storable pools, fixed or stationary equipment other than an underwater luminaire cord must not exceed ____ in length.
- 3 ft (correct)
- 5 ft
- 4.5 ft
- 2.5 ft
Receptacles located more than _____ above the floor are not required to be tamper resistant.
Receptacles located more than _____ above the floor are not required to be tamper resistant.
The feeder circuit for a mobile or manufactured home must be rated at not less than ____ at 120/240V.
The feeder circuit for a mobile or manufactured home must be rated at not less than ____ at 120/240V.
Ceiling grid which supports the wires may be permitted to support raceways.
Ceiling grid which supports the wires may be permitted to support raceways.
______ circuit breakers or sets of fuses are acceptable as overcurrent devices to provide overload protection in one-family dwellings.
______ circuit breakers or sets of fuses are acceptable as overcurrent devices to provide overload protection in one-family dwellings.
At least _____ of free conductor, measured from the point in the box where it emerges from its raceway or cable sheath shall be left at each outlet, junction and switch point.
At least _____ of free conductor, measured from the point in the box where it emerges from its raceway or cable sheath shall be left at each outlet, junction and switch point.
Splices and taps must be accessible and must not fill raceway to more than _____ of its cross-sectional area.
Splices and taps must be accessible and must not fill raceway to more than _____ of its cross-sectional area.
A two-pole circuit breaker or fusible switch shall be considered as _____ overcurrent devices.
A two-pole circuit breaker or fusible switch shall be considered as _____ overcurrent devices.
_____ is the maximum approved electrical trade size for PVC conduit.
_____ is the maximum approved electrical trade size for PVC conduit.
A portable generator is required to be grounded if the generator only supplies receptacles mounted on the generator.
A portable generator is required to be grounded if the generator only supplies receptacles mounted on the generator.
The overhead service conductors above a roof with a slope of at least 4 in 12 in have a minimum clearance of ______.
The overhead service conductors above a roof with a slope of at least 4 in 12 in have a minimum clearance of ______.
A switch or circuit breaker enclosure may be used as a raceway if the conductor fill does not exceed _____ :
A switch or circuit breaker enclosure may be used as a raceway if the conductor fill does not exceed _____ :
The ground detection sensing equipment must be connected as close as practicable to where the system receives its power supply.
The ground detection sensing equipment must be connected as close as practicable to where the system receives its power supply.
The coupling means of the Electric Vehicle supply equipment must be stored or located not less than _____ above the floor level.
The coupling means of the Electric Vehicle supply equipment must be stored or located not less than _____ above the floor level.
Receptacles must be mounted ____ or more above the deck surface of the pier.
Receptacles must be mounted ____ or more above the deck surface of the pier.
GFCI protection is required for ____, 125V, general purpose receptacles located in dirt confinement areas for livestock.
GFCI protection is required for ____, 125V, general purpose receptacles located in dirt confinement areas for livestock.
Cables listed for information technology equipment can be used to interconnect information technology equipment without the _____ cable length limit.
Cables listed for information technology equipment can be used to interconnect information technology equipment without the _____ cable length limit.
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Study Notes
Flexible Cords and Equipment
- Flexible cords cannot run through walls, ceilings, or floors.
- The maximum rating for cord-connected air conditioners should not exceed 50% of the branch circuit rating when other outlets are supplied.
Equipment Specifications
- Fixed or stationary equipment, excluding underwater luminaires, must have a cord length of no more than 3 ft.
- Receptacles above 5.5 ft are not required to be tamper-resistant.
Mobile Home Requirements
- Feeder circuits for mobile homes must have a minimum rating of 100 A at 120/240V.
Circuit Breakers and Fuses
- Acceptable numbers for circuit breakers or fuses in single-family dwellings range from 2 to 6.
- A two-pole circuit breaker or fusible switch counts as two overcurrent devices.
Conductor and Raceway Regulations
- Leave a minimum of 6 in of free conductor at each outlet, junction, and switch point.
- Splices and taps must be accessible and not fill raceways beyond 75% of their cross-sectional area.
Conduit Specifications
- The maximum approved electrical trade size for PVC conduit is 6 in.
Portable Generators
- A portable generator does not need to be grounded if it only supplies its own mounted receptacles.
Electrical Clearance and Safety
- Overhead service conductors require a minimum clearance of 3 ft above roofs with a slope of at least 4 in on 12 in.
- A switch or circuit breaker enclosure can function as a raceway if the conductor fill does not exceed 40%.
Ground Detection and Coupling
- Ground detection equipment must connect close to the power supply source.
- Coupling means for Electric Vehicle supply equipment must be located at least 18 in above the floor.
Receptacle Requirements
- Receptacles should be mounted at least 12 in above the deck surface on piers.
- GFCI protection is required for 15 A and 20 A general-purpose receptacles in animal confinement areas.
Cable Regulations
- Information technology equipment cables can interconnect devices without exceeding a cable length limit of 15 ft.
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