Electrical Level 3 Module 1 Load
Calculations and Branch Feeder Circuits
GUARANTEED PASS!!
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
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Calculations and Branch Feeder Circuits
GUARANTEED PASS!!
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
Page 1 of 2
