Journeyman Electrician’s Exam Journeyman Electrician's 2026 Edition 5

Question 1

What is the maximum overcurrent protection permitted for a 10 AWG copper conductor with THWN insulation used on a branch circuit?

Accepted Answer

30A

Answer

Per NEC 240.4(D)(3), 10 AWG copper conductors are limited to a maximum 30A overcurrent device on branch circuits.

Question 2

Which of the following is considered a separately derived system?

Accepted Answer

An isolation transformer with no direct electrical connection to the supply

Answer

A separately derived system has no direct electrical connection to supply conductors; an isolation transformer's secondary meets this definition.

Question 3

Under the NEC, which of the following luminaires (light fixtures) requires GFCI protection when installed outdoors in a wet location?

Accepted Answer

Only luminaires that plug into receptacles

Answer

NEC 210.8 requires GFCI protection for receptacles in wet outdoor locations; luminaires hardwired at wet locations do not inherently require GFCI by that section.

Question 4

What is the maximum distance a disconnect must be from a rooftop HVAC unit to be considered 'within sight' per the NEC?

Accepted Answer

50 feet

Answer

Per NEC Article 100, 'within sight' means visible and not more than 50 feet from the equipment requiring disconnection.

Question 5

A raceway installed in a concrete slab must have a minimum cover of how many inches if not encased in concrete?

Accepted Answer

3 inches

Answer

NEC Table 300.5 requires a minimum 3-inch cover for raceways installed under a building or concrete slab without additional concrete encasement.

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Journeyman Electrician's 2026 Edition 5