NEC 2026 Compatible

A 30-ampere branch circuit requires a minimum conductor size of:

Apprentice Level📋 NEC 210.3, 240.4(D)Branch Circuits
Circuit Diagram
Three-Way Switch Circuit 120V Source Hot (black) SW 1 3-Way COM Traveler 1 (red) Traveler 2 (white/red-marked) SW 2 3-Way COM Switch leg Light Neutral (white) — continuous to fixture Equipment Ground (bare/green) — to all boxes & fixture How It Works: Hot → SW1 common → traveler (1 or 2) → SW2 common → lamp → neutral back to source Both switches select which traveler is energized. Lamp ON when both select the same traveler.
A

14 AWG

B

12 AWG

C

10 AWG

D

8 AWG

Explanation & Direct Citation

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    Branch Circuits Practice Question: NEC 210.3, 240.4(D) | SparkShift | SparkShift