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? - ANS 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)? - ANS 225% Conductors must be derated when installed in conduit - ANS on or above rooftops Continuous loads are calculated at what percentage of the maximum current rating of the overcurrent device? - ANS 80% For a given load and length, the branch circuit voltage drop should not exceed - ANS 3% For resistance welders, the rating for the overcurrent protection device should not exceed what percentage of the primary current rating of the welder? - ANS 300% Show window lighting is calculated at 200VA per linear foot plus - ANS 125% The allowable ampacity for eleven No. 12 THHN copper conductors in a cable must be adjusted by - ANS 50% The load for 10' of multi-outlet assembly used to supply several loads simultaneously is - ANS 1,800VA The maximum size dual-element fuse for a 40hp, 3Ø, 460V motor with a Design Letter D is - ANS 100A What is the demand load for one household range with a nameplate rating of 11.75kW, 240V, 1Ø? - ANS 8kW What is the current-carrying capacity for No. 6 THWN aluminum conductors in conduit run through an ambient temperature of 38°C? - ANS 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 - ANS 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' - ANS 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'? - ANS 93' What is the load center length for a branch circuit with noncontinuous loads of 20A at 60' and 50A at 125'? - ANS 106.43' What is the load for 55' of show window using the linear foot method? - ANS 13,750VA What is the motor full-load current for a motor with a nameplate rating of 50hp, 460V, 3Ø? - ANS 65A What is the required circuit ampacity of a noncontinuous, single-phase load of 8.5kW at 277V? - ANS 30.69A What is the required circuit ampacity for a noncontinuous, three-phase load of 6kW at 208V? - ANS 16.65A
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