EA 160 Review chapter 5
How many receptacles are required for 90 linear feet of show window area?
8
The load for 6' of multi-outlet assembly used simultaneously is...
1,080VA
The general lighting load (expressed as a unit load per square foot) for a warehouse is...
1/4VA/ft squared
What is the calculated load, in amps, for a 120V circuit supplying four 150W recessed incandescent fixtures and six recessed fluorescent fixtures operating continuously? (Each fluorescent ballast is rated at 0.65A.)
11.125A
Branch circuit conductors supplying continuous duty loads are calculated at
125% of the rated load
What is the maximum number of general purpose non-continuous duty duplex receptacles that can be connected to a 20A, 120V circuit in a commercial building? What is the NEC@ required load rating for each receptacle?
13 receptacles; 180VA
What is the capacity, in amperes for a 20A circuit breaker supplying a continuous load?
16 A
What is the minimum conductor ampacity for four 1,000W, 208V, 1Ø electric baseboard heaters?
19.23A
What is the Current-carrying ampacity for each of 10 No. 10 THHN copper conductors installed in a single conduit?
20 A
A continuous load is defined by the NEC as a load whose maximum current is expected to continue for at least...
3 hours
What is the total load, in VA, for two small appliance branch circuits in a single-family dwelling?
3,OOOVA
Using the resistance formula, the voltage drop for an 18A, 208V, 3Ø load with a total circuit length of 105' using No. 10 solid copper conductors is...
3.96V
The General lighting load for a store is...
3VA/ft squared
What is the demand load, in amps, for one household electric range with a nameplate rating of 16.75kW, 1phz 240V?
41.67A
What is the demand load, in amps, for a single circuit supplying one wall-mounted oven rated 11.75kW, 1Ø, 240V, and a countertop cooking unit rated 9.6kW, 1Ø, 240V?
48.33 A
The voltage drop between the point of service and the farthest outlet in a branch circuit should not exceed...
5%
The voltage drop for a 480V, 3Ø circuit with a load of 26.5A, using No. 8 stranded copper conductors at a circuit length of 145' is...
5.18V
The voltage drop for a 208V, 1Ø circuit with a load of 26.5A, using No. 8 stranded copper conductors at a circuit length of 145' is...
5.98V
Which size copper branch circuit conductors are required to supply an air conditioning unit with a nameplate rating of 33.5A, 208V, 3phz
No. 6
Load calculations for circuits supplying lighting units with ballasts are based upon...
the ampere ratings of the ballasts
