Journeyman Electrician's Branch Circuits Flashcards
7 cards from real Journeyman Electrician’s Exam practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
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What is the maximum load permitted on a 20-ampere branch circuit serving general lighting and receptacles?
Answer: 16 amperes
NEC 210.19 limits continuous loads on a branch circuit to 80% of the circuit rating, so 20A × 0.80 = 16A maximum.
A small appliance branch circuit in a kitchen must be rated at least:
Answer: 20 amperes, 120 volts
NEC 210.11(C)(1) requires small appliance branch circuits to be 20-ampere, 120-volt circuits.
Which NEC section governs the required number of branch circuits based on calculated load?
Answer: 210.11
NEC 210.11 specifies the minimum number of branch circuits required based on calculated load.
A multiwire branch circuit sharing a neutral must have the ungrounded conductors on:
Answer: Different phases or legs
NEC 210.4 requires multiwire branch circuit ungrounded conductors to be on different phases so the neutral carries only the unbalanced current.
What is the minimum wire size required for a 20-ampere branch circuit using copper conductors?
Answer: 12 AWG
NEC 210.19(A) requires 12 AWG copper as the minimum conductor size for a 20-ampere branch circuit.
A branch circuit that serves only one piece of utilization equipment is called a(n):
Answer: Individual branch circuit
NEC Article 100 defines an individual branch circuit as one that supplies only one piece of utilization equipment.
How many small appliance branch circuits are required in a dwelling unit kitchen per the NEC?
Answer: Two
NEC 210.11(C)(1) requires a minimum of two 20-ampere small appliance branch circuits in a dwelling unit.