Deck 3: Calculating the Electrical Load

Question 1

According to NEC Table 220.12, the minimum load for basement storage space is volt-amperes per square foot (3 volt-amperes per square meter).

A)0.25
B)3
C)5.25
D)11

Answer 1

A

Question 2

The phrase " load" is used to designate when the value is in compliance with the requirements of NEC Article 220.

A)calculated
B)connected
C)theoretical
D)practical

Answer 2

A

Question 3

What is the allowance for lighting track in the drugstore?

Answer 3

If lighting track is installed, 150 volt-amperes is to be allowed for every 2 feet (600 mm) of track or any fraction thereof; see NEC 220.43(B).An exception provides that if the track lighting is supplied through a device that limits the current to the track, the load is permitted to be calculated based on the rating of the device used to limit the current.

Question 4

A single piece of equipment consisting of a multiple receptacle comprised of four or more receptacles shall be calculated at not less than volt-amperes per receptacle.

A)45
B)90
C)110
D)220

Question 5

NEC Article addresses air-conditioning and refrigeration equipment that incorporates hermetic refrigeration motor-compressor(s).

A)420
B)422
C)430
D)440

Question 6

According to NEC Table 220.12, armories and auditoriums should have a calculated unit load of at least volt-amperes per square meter.

A)11
B)22
C)33
D)39

Question 7

NEC Article applies to fixed electric space-heating equipment.

A)420
B)424
C)430
D)440

Question 8

The phrase " load" is used to designate the value of the load as it actually exists.

A)connected
B)calculated
C)theoretical
D)practical

Question 9

Why is it important to correctly tabulate the connected load?

Question 10

For show window lighting, allow voltamperes per linear foot (660 volt-amperes per linear meter), or use the connected load if that value is higher.

A)110
B)200
C)330
D)440

Question 11

To plan any electrical wiring project, the first step is to determine the that the electrical system is to serve.

A)municipality
B)feeders
C)load
D)higher-order function

Question 12

The purpose of the National Electrical Code is the practical safeguarding of from hazards arising from the use of electricity.

A)construction workers
B)homes
C)electricians
D)persons and property

Question 13

A sign outlet is assigned a minimum allowance of volt-amperes for each branch circuit required.

A)1200
B)2400
C)3600
D)4000

Question 14

At least one is required to be installed above each linear 12 ft (3.7 m) section of show window.

A)receptacle outlet
B)lighting outlet
C)switch
D)panelboard

Question 15

High harmonic currents associated with loads cause havoc by overheating the neutral conductor.

A)linear
B)nonlinear
C)calculated
D)balanced

Question 16

What are the requirements for the disconnecting means used with sign and outline lighting systems?

Question 17

For what period of time do we expect lighting loads in commercial occupancies, and what can we do to prevent overheating?

Question 18

NEC Article applies to motors, including those that are a part of motor-operated appliances unless "specifically amended" by NEC Article 422.

A)420
B)430
C)440
D)450

Question 19

Article in the NEC covers the installation of signs and outline lighting.

A)220.12
B)450
C)600
D)690

Question 20

What does the informational note state about hazards in the section of the NEC regarding its purpose?