Electrical Level 3 Module 1 Load Calculations and
Branch Feeder Circuits Quiz
According to the NEC®, the ampacity of branch circuit conductors must be derated
when there are more than how many current-carrying conductors in a raceway? -
Answer-3
/.Air conditioning overcurrent protective devices can never exceed what percentage of
the motor-rated load current or the branch circuit selection current (whichever is
greater)? - Answer-225%
/.Conductors must be derated when installed in conduit - Answer-on or above rooftops
/.Continuous loads are calculated at what percentage of the maximum current rating of
the overcurrent device? - Answer-80%
/.For a given load and length, the branch circuit voltage drop should not exceed -
Answer-3%
/.For resistance welders, the rating for the overcurrent protection device should not
exceed what percentage of the primary current rating of the welder? - Answer-300%
/.Show window lighting is calculated at 200VA per linear foot plus - Answer-125%
/.The allowable ampacity for eleven No. 12 THHN copper conductors in a cable must be
adjusted by - Answer-50%
/.The load for 10' of multi-outlet assembly used to supply several loads simultaneously
is - Answer-1,800VA
/.The maximum size dual-element fuse for a 40hp, 3Ø, 460V motor with a Design Letter
D is - Answer-100A
/.What is the demand load for one household range with a nameplate rating of 11.75kW,
240V, 1Ø? - Answer-8kW
/.What is the current-carrying capacity for No. 6 THWN aluminum conductors in conduit
run through an ambient temperature of 38°C? - Answer-44 Amps
/.What is the lighting load on a 120V circuit for six 100W incandescent lights and four
fluorescent fixtures with a ballast rating of 1.5A, all operating continuously for 8 hours
per day? 13.75A - Answer-13.75A
Branch Feeder Circuits Quiz
According to the NEC®, the ampacity of branch circuit conductors must be derated
when there are more than how many current-carrying conductors in a raceway? -
Answer-3
/.Air conditioning overcurrent protective devices can never exceed what percentage of
the motor-rated load current or the branch circuit selection current (whichever is
greater)? - Answer-225%
/.Conductors must be derated when installed in conduit - Answer-on or above rooftops
/.Continuous loads are calculated at what percentage of the maximum current rating of
the overcurrent device? - Answer-80%
/.For a given load and length, the branch circuit voltage drop should not exceed -
Answer-3%
/.For resistance welders, the rating for the overcurrent protection device should not
exceed what percentage of the primary current rating of the welder? - Answer-300%
/.Show window lighting is calculated at 200VA per linear foot plus - Answer-125%
/.The allowable ampacity for eleven No. 12 THHN copper conductors in a cable must be
adjusted by - Answer-50%
/.The load for 10' of multi-outlet assembly used to supply several loads simultaneously
is - Answer-1,800VA
/.The maximum size dual-element fuse for a 40hp, 3Ø, 460V motor with a Design Letter
D is - Answer-100A
/.What is the demand load for one household range with a nameplate rating of 11.75kW,
240V, 1Ø? - Answer-8kW
/.What is the current-carrying capacity for No. 6 THWN aluminum conductors in conduit
run through an ambient temperature of 38°C? - Answer-44 Amps
/.What is the lighting load on a 120V circuit for six 100W incandescent lights and four
fluorescent fixtures with a ballast rating of 1.5A, all operating continuously for 8 hours
per day? 13.75A - Answer-13.75A
