Deck 13: Nondwelling Load Calculations

Question 1

To calculate multiple noncoincident loads used simultaneously, the ____ load(s) that will be used at one time is (are) used in calculating the total feeder/service load.

A) average
B) largest
C) medial
D) smallest

Answer 1

B

Question 2

General-purpose receptacles are ____.

A) continuous loads
B) not allowed in commercial spaces
C) not included in the total load
D) not continuous loads

Answer 2

D

Question 3

Feeder conductors and overcurrent protection shall be sized at 100% of noncontinuous loads plus ____% of continuous loads.

A) 50
B) 75
C) 100
D) 125

Answer 3

D

Question 4

The feeder (or service) neutral load is the ____ of the load determined by Article 220.

A) maximum balance
B) minimum unbalance
C) maximum unbalance
D) minimum unbalance

Question 5

The demand factor for three pieces of equipment is 90%; for four pieces, ____%; for five pieces, 70%; and for more than five pieces, 65%.

A) 60
B) 70
C) 80
D) 90

Question 6

In calculating general lighting load, each floor's area shall be calculated using the building's (or area's) ____.

A) interior dimensions
B) outside dimensions
C) cross-sectional dimensions
D) cubic dimensions

Question 7

A load where the maximum current is expected to continue for ____ or more is a continuous load.

A) one hour
B) two hours
C) three hours
D) four hours

Question 8

In determining the load of the highest-rated motor, the greater of either the ampere rating from 430.22(E) or the largest continuous-duty motor full-load current multiplied by ____ shall be used in the summation.

A) 0.75
B) 1.25
C) 1.50
D) 1.75

Question 9

The load calculation form results (overcurrent protection and conductors) represent ____ requirement.

A) the complete
B) only a minimum
C) the first part of the
D) the written portion of the

Question 10

In office buildings, the receptacle load shall be calculated to be the larger of (1) the calculated load from 220.14(I), or (2) ____ volt-ampere(s) per square foot.

A) 1
B) 6
C) 8
D) 10

Question 11

Sign and outline lighting outlets in commercial buildings are computed at a minimum of ____ volt-amperes.

A) 600
B) 800
C) 1000
D) 1200

Question 12

Receptacle outlets are calculated at a minimum of ____ volt-amperes for each single (or multiple) receptacle on one yoke (or strap).

A) 180
B) 190
C) 195
D) 200

Question 13

Where the grounding electrode conductor or bonding jumper connects to a single or multiple rod, pipe, or plate electrode(s) or any combination thereof, or does not extend on to other types of electrodes that require a larger size conductor, the grounding electrode conductor shall not be required to be larger than ____.

A) 2 AWG copper wire or 4 AWG aluminum
B) 4 AWG copper wire or 6 AWG aluminum
C) 6 AWG copper wire or 4 AWG aluminum
D) 6 AWG copper wire or 8 AWG aluminum

Question 14

Fractions of an ampere 0.5 and higher are ____, while fractions less than 0.5 are dropped.

A) rounded up
B) applied exactly
C) rounded down
D) halved

Question 15

Conductors ____ AWG and larger can be connected in parallel (electrically joined at both ends to form a single conductor).

A) 1/0
B) 1/2
C) 1/3
D) 1/4

Question 16

The volt-ampere unit load for an office building is ____.

A) 1.3
B) 2.5
C) 3.0
D) 3.5

Question 17

Three-phase voltage is found by multiplying the voltage (single-phase) by ____.

A) 1.327
B) 1.732
C) 1.832
D) 1.914