NEC Equipment for General Use 4

Question 1

A surface-mounted LED luminaire with a completely enclosed light source is installed on the ceiling of a clothes closet. What is the minimum clearance to the defined storage space per NEC 410.16(C)?

Accepted Answer

12 in (300 mm)

Answer

NEC 410.16(C)(1) requires 300 mm (12 in) between surface-mounted incandescent or LED luminaires with enclosed light sources and the storage space.

Question 2

A non-Type IC recessed luminaire must have what minimum spacing from thermal insulation per NEC 410.116(B)?

Accepted Answer

3 in (75 mm)

Answer

NEC 410.116(B) requires thermal insulation to be kept at least 75 mm (3 in) from non-IC recessed luminaires.

Question 3

Per NEC 410.10(D), cord-connected luminaires, pendants and ceiling fans may not be located within a zone measured how far from the top of a bathtub rim?

Accepted Answer

3 ft horizontally and 8 ft vertically

Answer

NEC 410.10(D) defines the bathtub/shower zone as 900 mm (3 ft) horizontally and 2.5 m (8 ft) vertically from the top of the rim or threshold.

Question 4

A fixed storage-type water heater with a capacity of 80 gallons must have its branch circuit rated at not less than what percentage of the nameplate rating per NEC 422.13?

Accepted Answer

125%

Answer

NEC 422.13 treats storage water heaters of 450 L (120 gal) or less as continuous loads, requiring a branch circuit of at least 125% of the nameplate rating.

Question 5

What cord length range does NEC 422.16(B)(1) permit for a cord-and-plug-connected kitchen waste disposer?

Accepted Answer

18 in to 36 in

Answer

NEC 422.16(B)(1) requires a disposer cord to be not less than 450 mm (18 in) and not over 900 mm (36 in) long.

NEC Practice Test

NEC Practice Test

NEC Equipment for General Use 4