Chapter 3 NEC - Review Questions

Heating or A/C loads are calculated at ______ of the nameplate rating and the largest load is used (Standard Calculation).

100%

Less than four seperately controlled electric space-heating units in a dwelling unit are calculated at _____% of their nameplate ratings (Optional Calculation).

65%

Four or more appliances that are fasten-in-place in a one-family dwelling are calculated at ______ of the total load for all four appliances (Standard Calculation).

75%

A(n) ______ is the amount of electricity required at a given time.

demand

The _______ load is the maximum unbalance between any of the ungrounded conductors and the grounded conductor.

feeder neutral

______ outlet loads are calculated per the rules found in 430.22, 430.24, and 440.6.

motors

The demand load for household electric ranges rated in excess of ______ kW is calculated per Table 220.55 (Standard Calculation).

1 3/4KW

Each single or multiple receptacle on a single strap is calculated at _____ VA.

180A

Each dwelling shall be supplied with a(n) ______ A branch circuit to supply laundry receptacle outlet(s).

20

Feeders for several motors are calculated using the sum of the FLC tables of all motors plus ______% of the largest motor (Standard Calculation).

25

General Lighting loads for a dwelling units are calculated at ______ VA per square foot.

3

After the minimum ampacity of the dwelling service has been calculated, Table _____ and 310.15(B)(7)(1) are used to determine the size of service-entrance conductors.

310.15(B)(2)(16)

The Optional Calculation for dwelling units consists of heating and A/C loads and ______ loads.

general

_______ loads are loads that are not on at the same time.

non coincidental

The total area of an occupancy is determined from the ______ dimensions of the building or structure.

outside

Demand factors may be applied to ______ of the six loads of the Standard Calculation.

4

The total load for household clothes dryers is calculated at ______ VA or the nameplate rating, whichever is higher (Standard Calculation).

5000W

T or F. The Optional Calculation can be used to find the total ampacity of a multifamily dwelling with natural gas cooking equipment.

F

For 1∅ systems, the formula _____ is used to determine minimum ampacity of the ungrounded conductors.

I= VA/V

______ branch circuits supply all receptacle outlets located in the kitchen, pantry, breakfast room, dining room, or similar areas of dwelling units (Standard Calculation).

small appliance