1
Electrical Level 3 Module 1 Load Calculations and Branch
Feeder Circuits Questions with Answers (100% 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? 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%
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, 2
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
© 2025 All rights reserved
Electrical Level 3 Module 1 Load Calculations and Branch
Feeder Circuits Questions with Answers (100% 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? 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%
© 2025 All rights reserved
, 2
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
© 2025 All rights reserved
