What Size Breaker for Garbage Disposal?
A garbage disposal requires a 15A breaker with 14 AWG wire on a 120V dedicated or shared with dishwasher circuit.
🔌 Wire Length & Voltage Drop Check
Garbage Disposal Wiring Guide — NEC Requirements
Garbage disposals typically draw 5-8A on a 120V circuit. Can share a 20A circuit with the dishwasher per NEC provisions, though a dedicated circuit is ideal.
Pro Tip
💡 If sharing with a dishwasher, use a 20A circuit with 12 AWG. Always use a GFCI-protected circuit.
Why a 15A Breaker?
The garbage disposal draws approximately 7A at 120V (840W). A 15A breaker provides adequate protection.
Wire Sizing per NEC 310.16
For a 15A/120V circuit, 14 AWG copper is required per NEC Table 310.16 at 75°C. For runs over 75 feet, upsize to 12 AWG. Use our Wire Size Calculator and Voltage Drop Calculator.
Complete Parts List
To wire a garbage disposal circuit: a 15A single-pole breaker, 14 AWG NM-B cable (Romex) for interior runs or THHN/THWN-2 in conduit for exposed runs, a NEMA 5-15 or 5-20 receptacle, cable clamps, and appropriate junction boxes.
Disclaimer: This guide is for reference only. All electrical work must be performed by or verified by a licensed electrician. Local codes may differ from NEC.