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Case #7

Title: What size wire for a 15 amp breaker

System type: resi

Created: 2026-03-24 15:36:59.342186

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Question

What size wire for a 15 amp breaker

Answer

For a 15 amp breaker in a residential system, use 14 AWG copper wire. 

**Verify:** 
- The wire type is rated for the application (typically NM-B for indoor residential wiring).
- The circuit length and voltage drop if unusually long runs.

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