E2 NEC Compliance 2

Question 1

Under NEC Article 230, what is the maximum number of service disconnects permitted for a single commercial occupancy?

Accepted Answer

6

Answer

NEC 230.71 allows a maximum of six service disconnects for a single commercial occupancy grouped in one location.

Question 2

NEC 210.19(A) requires that branch circuit conductors have an ampacity of at least what percentage of the continuous load they serve?

Accepted Answer

125%

Answer

Conductors must be sized at 125% of the continuous load to account for heat buildup under sustained operation.

Question 3

According to NEC 450.13, a dry-type transformer rated 112.5 kVA or less must have a minimum clearance of how many inches from combustible material?

Accepted Answer

12 inches

Answer

NEC 450.13(A) requires at least 12 inches of separation between a dry-type transformer and combustible material unless the transformer is separated by a fire-resistant, heat-insulating barrier.

Question 4

NEC 700.12 requires emergency system sources to supply full load within how many seconds of normal power failure?

Accepted Answer

10 seconds

Answer

Emergency systems must restore power within 10 seconds of normal source failure per NEC 700.12.

Question 5

Under NEC 404.2(C), a switch controlling a lighting outlet in a bathroom of a commercial occupancy must be located where?

Accepted Answer

Inside the bathroom, away from the tub or shower

Answer

NEC 404.2(C) permits switches inside bathrooms if they are not within reach of a tub or shower.

(E2) E2 Commercial Electrical Inspector Practice Test

(E2) E2 Commercial Electrical Inspector Practice Test

E2 NEC Compliance 2