What Size Breaker for Washing Machine?
A washing machine requires a 20A breaker with 12 AWG wire on a 120V dedicated circuit.
🔌 Wire Length & Voltage Drop Check
Washing Machine Wiring Guide — NEC Requirements
Washing machines require a dedicated 20A/120V circuit. The outlet must be a 3-prong grounded GFCI-protected receptacle per NEC 210.8.
Pro Tip
💡 In laundry rooms, NEC requires GFCI protection for all 125V receptacles. The washer circuit should not share with any other load.
Why a 20A Breaker?
The washing machine draws approximately 10A at 120V (1200W). A 20A breaker provides adequate protection.
Wire Sizing per NEC 310.16
For a 20A/120V circuit, 12 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 washing machine circuit: a 20A single-pole breaker, 12 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.