Licensed Electrical Contractor Electrical Codes & Standards 4

Question 1

NEC 110.26 requires a minimum clear working space in front of electrical equipment operating at 601V or less. For equipment with exposed live parts on one side and grounded parts on the other, what is the minimum depth of working space?

Accepted Answer

3.5 feet

Answer

NEC Table 110.26(A)(1) Condition 2 requires 3.5 feet of working space depth for equipment with live parts on one side and grounded parts on the other.

Question 2

Under NEC 240.4(D), which wire size is NOT permitted to be protected by a standard 20-ampere overcurrent device?

Accepted Answer

14 AWG copper

Answer

NEC 240.4(D) limits 14 AWG copper conductors to a maximum 15-ampere overcurrent device, not 20 amperes.

Question 3

According to NEC 334.15, where NM cable is run exposed on a wall surface, it must be protected from physical damage by installing it:

Accepted Answer

So it closely follows the wall surface or structural members

Answer

NEC 334.15(B) requires exposed NM cable to closely follow the surface of the building finish or of running boards.

Question 4

NEC 410.130(G) requires luminaires installed in clothes closets to be what type?

Accepted Answer

LED or fluorescent enclosed types, surface-mounted or recessed

Answer

NEC 410.130(G) permits only enclosed LED or fluorescent luminaires surface-mounted or recessed in clothes closets to prevent fire hazards.

Question 5

Under NEC 225.30, what is the maximum number of feeder or branch circuits allowed to supply an outside building or structure from a single service?

Accepted Answer

One feeder or branch circuit per voltage system

Answer

NEC 225.30 limits supply to one feeder or branch circuit per voltage system to an outside building or structure, with listed exceptions.

Licensed Electrical Contractor Practice Test

Licensed Electrical Contractor Practice Test

Licensed Electrical Contractor Electrical Codes & Standards 4