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Branch circuits are rated according to ___.

• the ampere rating of the overcurrent device

• the size of the wire used for the circuit

• Either a or b

• Neither a nor b

In construction of commercial and industrial facilities, the quantity and rating of electrical circuits is usually designed by the ___.

• electrician

• architect

• consulting engineer

Tags

NGSS.MS-ETS1-2

NGSS.MS-ETS1-4

How many parking lot luminaires can be connected to a 20-amp circuit? Each luminaire will draw .954 amps at 480 volts. These luminaires will operate continuously.

• 16

• 20

• 17

• 25

• 21

A 20-amp breaker operating at 277 volts can supply a maximum of ___ luminaires. Each luminaire will draw 72.6 watts at 277 volts. These luminaires will not be operated continuously.

• 72

• 61

• 23

• 76

• 73

Branch circuits that serve a ___ are required to be rated at 20 amperes where installed in a house.

• bathroom

• kitchen

• laundry room

• All of the above

• None of the above

If the ampacity of a conductor does not match up with a standard circuit breaker size, you are allowed to ___, according to Section 240.4(B) in the NEC®.

• use any size breaker that has a rating that is within 50% of the ampacity of the conductor

• use the next higher standard size breaker

Refer to Figure 108.014. This kitchen is in a house. Does the NEC® permit receptacle 11 to be connected to a circuit that is not one of the 20-amp small-appliance branch circuits?

• Yes

• No

Refer to Figure 108.014. This kitchen is not in a dwelling. Does the NEC® require receptacles 2, 4, 6, and 7 to be installed?

• Yes

• No

The smallest wire size for which overcurrent protection is specified in the Code is ___.

• 20 AWG

• 18 AWG

• 16 AWG

• 14 AWG

Although the NEC® contains many exceptions, in general, the rating of a branch-circuit overcurrent protective device must have a rating that is ___ or equal to the ampacity of the branch-circuit conductors connected to it.

• greater than

• less than