Journeyman Electrician’s Exam Journeyman Electrician's Emergency and Standby Systems 2

Question 1

Under NEC Article 701, Legally Required Standby Systems must restore power within how many seconds of normal power loss?

Accepted Answer

60 seconds

Answer

NEC 701.12 allows legally required standby systems up to 60 seconds to restore power, compared to the 10-second requirement for emergency systems.

Question 2

Optional Standby Systems covered by NEC Article 702 are primarily intended to:

Accepted Answer

Protect private business interests and equipment

Answer

NEC Article 702 covers Optional Standby Systems, installed voluntarily to protect equipment or business operations rather than by government mandate.

Question 3

NEC Article 708 covers which specialized power system type?

Accepted Answer

Critical Operations Power Systems (COPS)

Answer

NEC Article 708 covers Critical Operations Power Systems (COPS), designed for facilities vital to national security such as 911 dispatch centers and data centers.

Question 4

Per NEC 700.12(B)(2), the minimum duration for monthly load testing of an emergency generator is:

Accepted Answer

30 minutes

Answer

NEC 700.12(B)(2) requires monthly testing of emergency generators under load for a minimum of 30 minutes to verify operational reliability.

Question 5

A separate utility service is permitted as an emergency power source under NEC 700.12(D) when:

Accepted Answer

The AHJ approves it and the conductors are adequately protected

Answer

NEC 700.12(D) allows a separate service as an emergency source when the Authority Having Jurisdiction approves and the service conductors are protected from physical damage.

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Journeyman Electrician's Emergency and Standby Systems 2