NEC Special Occupancies 5

Question 1

Temporary electrical power for holiday decorative lighting is permitted for a maximum of how many days?

Accepted Answer

90 days

Answer

NEC 590.3(B) limits temporary holiday decorative lighting to 90 days.

Question 2

On a construction site, which receptacles that are not part of the permanent wiring must have GFCI protection for personnel?

Accepted Answer

All 125-volt, single-phase, 15-, 20-, and 30-ampere receptacle outlets

Answer

NEC 590.6(A)(1) requires GFCI protection on all 125-V, single-phase, 15-, 20-, and 30-A temporary receptacle outlets.

Question 3

Where must the service equipment for a mobile home be located?

Accepted Answer

Adjacent to the mobile home, not mounted in or on it, and within 30 feet of its exterior wall

Answer

NEC 550.32(A) requires service equipment adjacent to, not on or in, the mobile home and within 30 ft of its exterior wall.

Question 4

When calculating the service load for a mobile home park, what is the minimum load per mobile home lot?

Accepted Answer

16,000 VA

Answer

NEC 550.31(1) sets a minimum of 16,000 VA per mobile home lot.

Question 5

At a marina, receptacles that provide shore power to boats must have ground-fault protection with a trip level not exceeding what?

Accepted Answer

30 mA

Answer

NEC 555.35(A)(1) limits ground-fault protection for shore power receptacles to 30 mA.

NEC Practice Test