Electrical Level 3 Module 1 Load Calculations
and Branch Feeder Circuits questions and 100%
verified correct answers
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? -
Correct 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)? - Correct Answer 225%
Conductors must be derated when installed in conduit - Correct Answer on or above
rooftops
Continuous loads are calculated at what percentage of the maximum current rating of
the overcurrent device? - Correct Answer 80%
For a given load and length, the branch circuit voltage drop should not exceed - Correct
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? - Correct Answer
300%
Show window lighting is calculated at 200VA per linear foot plus - Correct Answer 125%
The allowable ampacity for eleven No. 12 THHN copper conductors in a cable must be
adjusted by - Correct Answer 50%
The load for 10' of multi-outlet assembly used to supply several loads simultaneously is
- Correct Answer 1,800VA
The maximum size dual-element fuse for a 40hp, 3Ø, 460V motor with a Design Letter
D is - Correct Answer 100A
What is the demand load for one household range with a nameplate rating of 11.75kW,
240V, 1Ø? - Correct Answer 8kW
What is the current-carrying capacity for No. 6 THWN aluminum conductors in conduit
run through an ambient temperature of 38°C? - Correct 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 - Correct Answer 13.75A
What is the load center distance for a 208V, four-wire, three-phase branch circuit with
fixed noncontinuous loads from the source of 60A at 45', 40A at 60', 30A at 75', and 25A
at 100' - Correct Answer 63.55'
What is the load center length for a branch circuit consisting of noncontinuous loads of
125A at 80', 75A at 110', and 50A at 100'? - Correct Answer 93'
What is the load center length for a branch circuit with noncontinuous loads of 20A at
60' and 50A at 125'? - Correct Answer 106.43'
What is the load for 55' of show window using the linear foot method? - Correct Answer
13,750VA
and Branch Feeder Circuits questions and 100%
verified correct answers
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? -
Correct 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)? - Correct Answer 225%
Conductors must be derated when installed in conduit - Correct Answer on or above
rooftops
Continuous loads are calculated at what percentage of the maximum current rating of
the overcurrent device? - Correct Answer 80%
For a given load and length, the branch circuit voltage drop should not exceed - Correct
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? - Correct Answer
300%
Show window lighting is calculated at 200VA per linear foot plus - Correct Answer 125%
The allowable ampacity for eleven No. 12 THHN copper conductors in a cable must be
adjusted by - Correct Answer 50%
The load for 10' of multi-outlet assembly used to supply several loads simultaneously is
- Correct Answer 1,800VA
The maximum size dual-element fuse for a 40hp, 3Ø, 460V motor with a Design Letter
D is - Correct Answer 100A
What is the demand load for one household range with a nameplate rating of 11.75kW,
240V, 1Ø? - Correct Answer 8kW
What is the current-carrying capacity for No. 6 THWN aluminum conductors in conduit
run through an ambient temperature of 38°C? - Correct 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 - Correct Answer 13.75A
What is the load center distance for a 208V, four-wire, three-phase branch circuit with
fixed noncontinuous loads from the source of 60A at 45', 40A at 60', 30A at 75', and 25A
at 100' - Correct Answer 63.55'
What is the load center length for a branch circuit consisting of noncontinuous loads of
125A at 80', 75A at 110', and 50A at 100'? - Correct Answer 93'
What is the load center length for a branch circuit with noncontinuous loads of 20A at
60' and 50A at 125'? - Correct Answer 106.43'
What is the load for 55' of show window using the linear foot method? - Correct Answer
13,750VA
