Journeyman Electrician’s Exam Journeyman Electrician's General 4

Question 1

What is the maximum overcurrent protection permitted for a 10 AWG copper conductor with 60°C terminations in a general wiring application?

Accepted Answer

30 amps

Answer

Per NEC 310.12 and Table 310.12, 10 AWG copper at 60°C is rated 30 amps, which is the maximum allowable overcurrent protection under NEC 240.4.

Question 2

Where must a disconnecting means be located relative to a motor in most installations?

Accepted Answer

Within sight of the motor and the driven machinery

Answer

NEC 430.102(B) requires the motor disconnecting means to be in sight from the motor location and the driven machinery.

Question 3

Which of the following is an acceptable method of bonding a metal water pipe system to the electrical grounding system in a dwelling?

Accepted Answer

Using a #4 AWG copper bonding jumper connected to the grounding electrode system

Answer

NEC 250.104(A) requires bonding of interior metal water piping using a conductor sized per Table 250.102(C)(1), typically 4 AWG copper for a 200A service.

Question 4

According to NEC Article 210, what is the required arc-fault circuit interrupter (AFCI) protection location in a newly constructed dwelling for bedroom circuits?

Accepted Answer

At the panel or at the first outlet of the branch circuit

Answer

NEC 210.12(A) requires AFCI protection and permits the device to be installed at the panel or at the first outlet when a listed outlet branch circuit AFCI is used.

Question 5

What is the voltage drop limit recommended by the NEC for a branch circuit serving sensitive electronic equipment?

Accepted Answer

3%

Answer

NEC 210.19(A) informational note recommends a maximum 3% voltage drop on branch circuits for efficiency and equipment protection.

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Journeyman Electrician's General 4