Journeyman Electrician’s Exam Journeyman Electrician's NEC 5

Question 1

NEC 700.12 specifies legally required standby and emergency system power sources. Which of the following is NOT an acceptable power source for an emergency system?

Accepted Answer

Utility company's second service feed

Answer

A second utility feed is not an acceptable emergency power source because both feeds can fail simultaneously during a utility outage or disaster.

Question 2

Under NEC 550.25, manufactured homes must have a minimum service entrance rating. What is the minimum ampere rating required for a manufactured home service?

Accepted Answer

100 amperes

Answer

NEC 550.25 requires manufactured homes to have a minimum 100-ampere service for a 3-wire, 120/240-volt supply.

Question 3

According to NEC 404.8(A), switches and circuit breakers used as switches must be located so they can be operated from a readily accessible location. What is the maximum height for the center of the grip of a switch handle?

Accepted Answer

6 feet 7 inches (79 in)

Answer

NEC 404.8(A) limits the center of the grip of the operating handle of a switch to not more than 6 feet 7 inches (2.0 m) above the floor or working platform.

Question 4

NEC 445.13 covers the ampacity of conductors from generators. Conductors from generator terminals to the first overcurrent device must have an ampacity of at least what percentage of the generator nameplate current rating?

Accepted Answer

115%

Answer

NEC 445.13 requires conductors from the generator terminals to the first distribution device to have an ampacity of not less than 115% of the nameplate current rating.

Question 5

Per NEC 517.13, patient care areas in health care facilities require a special grounding arrangement. What is the purpose of requiring both an insulated equipment grounding conductor AND a metallic raceway or cable armor in patient care branch circuits?

Accepted Answer

To provide redundant grounding paths for safety-critical equipment

Answer

NEC 517.13 requires both an insulated EGC and a metallic wiring method to provide two independent grounding paths, reducing the risk of ground faults in patient care areas.

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Journeyman Electrician's NEC 5