Journeyman Electrician’s Exam Journeyman Electrician's General 3

Question 1

What is the minimum size copper equipment grounding conductor (EGC) required for a circuit protected by a 60-amp overcurrent device?

Accepted Answer

10 AWG

Answer

NEC Table 250.122 requires a minimum 10 AWG copper EGC for circuits protected by overcurrent devices rated up to 60 amps.

Question 2

A receptacle outlet must be installed so that no point along the floor line of a wall in a dwelling unit is more than how far from a receptacle?

Accepted Answer

6 feet

Answer

NEC 210.52(A) requires receptacles in dwelling unit living areas such that no point is more than 6 feet from a receptacle along the floor line.

Question 3

Which conductor color is PROHIBITED from being used as an ungrounded (hot) conductor in a building's wiring system?

Accepted Answer

Green

Answer

NEC 250.119 reserves green (and green with yellow stripes) exclusively for equipment grounding conductors; it cannot be used for ungrounded conductors.

Question 4

What is the purpose of the neutral conductor in a 120/240V single-phase, 3-wire service?

Accepted Answer

It carries unbalanced current from 120V loads and serves as a common return

Answer

The neutral carries the difference (unbalanced) current between the two hot legs for 120V loads and serves as the common return path.

Question 5

What minimum clearance must unguarded live parts operating at 601–2,500V require from grounded parts in working space?

Accepted Answer

3 feet

Answer

NEC Table 110.26(A)(1) Condition 1 specifies a minimum 3-foot working clearance for voltages from 601 to 2,500V to ground.

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Journeyman Electrician's General 3