Journeyman Electrician’s Exam Journeyman Electrician's 3

Question 1

What is the minimum size copper equipment grounding conductor required for a circuit protected by a 100-ampere overcurrent device?

Accepted Answer

8 AWG

Answer

Per NEC Table 250.122, an 8 AWG copper EGC is required for circuits protected by overcurrent devices up to 100 amperes.

Question 2

A single 120-volt, 20-ampere kitchen small appliance circuit can serve a maximum of how many square feet of counter space?

Accepted Answer

There is no square footage limit — two circuits are required regardless

Answer

NEC 210.11(C)(1) requires at least two small-appliance branch circuits for kitchen countertop receptacles, regardless of counter area.

Question 3

What is the maximum voltage drop recommended by the NEC for a branch circuit?

Accepted Answer

3%

Answer

NEC 210.19(A) informational note recommends that branch circuit voltage drop not exceed 3% for efficiency and performance.

Question 4

Which of the following is the correct formula to calculate the resistance of a conductor?

Accepted Answer

R = V / I

Answer

Ohm's Law states that resistance equals voltage divided by current (R = V/I), the fundamental relationship in electrical circuits.

Question 5

When sizing conductors for a continuous load, the conductor must be rated for at least what percentage of the continuous load?

Accepted Answer

125%

Answer

NEC 210.19(A)(1) and 215.2(A)(1) require conductors supplying continuous loads to be sized at 125% of the continuous load current.

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