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Case #8

Title: What size wire for a 15 amp breaker

System type: resi

Created: 2026-03-28 16:27:24.798966

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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 (e.g., NM-B, THHN) matches local code and installation conditions.

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