Skill room
Motors Room
Motor questions punish one mistake: mixing FLC with FLA. FLC comes from the tables in Article 430 and sizes the branch-circuit conductors at 125 percent. FLA comes off the nameplate and sizes the overload. Two numbers, two jobs. Learn which table feeds which rule and motor problems stop surprising you.
Last reviewed June 2026 · Staff Answer
Daily drill · original
A single continuous-duty motor has a table full-load current of 28 amps.
What minimum branch-circuit conductor ampacity does it need?
Pick an answer to see the work and why each wrong choice traps people.
What this room is for
- Separating FLC from FLA and what each one sizes
- Reading the motor FLC tables without second-guessing
- Working conductor, overload, and protection in the right order
What not to post
- Asking for pasted NEC tables. Cite the article and table number.
- Posting real exam questions. Build an original scenario.
- Sharing identifying details.
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