CEI Emergency & Standby Systems 2

Question 1

According to NEC Article 700, how quickly must emergency lighting systems restore illumination after normal power fails?

Accepted Answer

Within 10 seconds

Answer

NEC 700.12 requires emergency lighting to be restored within 10 seconds of normal power failure.

Question 2

Which NEC article governs legally required standby systems?

Accepted Answer

Article 701

Answer

NEC Article 701 covers legally required standby systems, which are distinct from emergency systems in Article 700.

Question 3

A transfer switch for an emergency system must be located:

Accepted Answer

As close as practicable to the loads served

Answer

NEC 700.12 requires transfer equipment to be located as close as practicable to the emergency loads it serves.

Question 4

What is the minimum duration an emergency lighting unit battery must supply power under NEC Article 700?

Accepted Answer

2 hours

Answer

NEC 700.12(A) requires unit equipment batteries to maintain emergency illumination for a minimum of 1.5 hours — but the code-required duration for the system overall is 1.5 hours; unit equipment must supply power for 1.5 hours; the full system minimum is 1½ hours.

Question 5

Under NEC 700.10, emergency system wiring must be kept entirely independent of other wiring EXCEPT when:

Accepted Answer

Both circuits are in separate raceways within the same enclosure

Answer

NEC 700.10(B) allows emergency and normal wiring to share an enclosure only if they are in separate raceways or separated by a barrier.

(CEI) Certified Electrical Inspector Practice Test

(CEI) Certified Electrical Inspector Practice Test

CEI Emergency & Standby Systems 2