Electricity Level 3, Section 1 With Answers

What is the demand load for one household range with a nameplate rating of 11.75kW, 240V, 1○? - correct answer 8kW 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% The NEC requires that the ampacity of branch circuit conductors be derated when there are more than how many current-carrying conductors in a raceway? - correct answer 3 According to the NEC, the total load of show windows must be calculated at not less than - correct answer 200VA per linear foot of show window 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% What is the current-carrying capacity for No. 6 THWN aluminum conductors in conduit run through an ambient temperature of 38°C? - correct answer 44A What is the voltage drop for a 120V, single-phase, two-wire branch circuit, 100' long, using copper conductors of 6,530 circular mils with a noncontinuous load of 13A? - correct answer 5.14V What is the load center length for a branch circuit with no continuous loads of 20A at 60' from the source and 50A at 125' from the source? - correct answer 106.43' What is the required circuit ampacity of a noncontinuous, single phase load of 8.5kW at 277V? - correct answer 30.69A The load for 10' of multi-outlet assembly used to supply several loads simultaneously is - correct answer 1,800VA Conductors must be derated when installed in conduit - correct answer on or above rooftops What is the total load required by the NEC for two appliance branch circuits plus a laundry branch circuit? - correct answer 4,500VA Continuous loads are calculated at what percentage of the maximum current rating of the overcurrent device? - correct answer 80% The maximum size dual-element fuse for a 40hp, 3○,460V motor with a Design Letter D is - correct answer 100A What is the motor full-load current for a motor with a nameplate rating of 50hp, 460V, 3○? - correct answer 65A A sign load cannot exceed - correct answer 80% of the branch circuit rating What is the feeder load (in VA) for three small appliance branch circuits? - correct answer 4,500VA What is the ampacity of a water heater with a nameplate rating of 7,200VA at 240V? - correct answer 37.5A When space heating equipment uses electric resistance heating elements, protection for the resistance elements must not exceed - correct answer 60A A noncontinuous load of two 120V outlets for heavy-duty lamp holders would have a load of - correct answer 1,200VA The demand load for four pieces of commercial cooking equipment is - correct answer 80%