Electric Clothes Dryer: Wiring Requirements
Wiring a electric clothes dryer correctly means running 10 AWG copper on a dedicated 30-amp circuit with GFCI protection. This guide covers the complete wiring requirements per NEC 2023, including wire gauge, breaker size, cable type, and installation specifics for a laundry room. Whether you are hiring an electrician or planning the circuit yourself, the specifications below ensure your installation meets code.
What usually triggers this search
The new dryer has a 4-prong plug and the wall has a 3-prong outlet. Or you moved into a house with a gas hookup and need a 240V circuit run for an electric dryer. Delivery is next week and the outlet doesn't match.
What goes wrong
Same 3-wire to 4-wire story as ranges, but dryers use NEMA 14-30R instead of 14-50R. The dangerous shortcut: using the old 3-prong cord on a new dryer by installing the bonding strap between neutral and ground on the dryer frame. Manufacturers include the strap for exactly this situation, but it's only legal on existing installations where no 4-wire option exists. New circuits must be 4-wire. Another failure: long runs in 10 AWG that land on a 30A breaker but the circuit is 60+ feet from the panel. Voltage drop makes the dryer heat element cycle longer, and the dryer takes forever to dry clothes. Owners blame the dryer when the real problem is undersized wire for the distance.
What the inspector checks
- NEMA 14-30R receptacle on new installations (not 10-30R)
- 10 AWG copper minimum on 30A breaker
- 4-wire cable (10/3 with ground) for new circuits
- No bonding strap at dryer if 4-wire circuit is present
- Receptacle within 6 feet of dryer location per manufacturer specs
Should you hire an electrician?
Swapping a 3-prong dryer cord for a 4-prong cord is a 15-minute job with a screwdriver. It's the most common DIY electrical task and is safe if you follow the terminal markings. Running new 10/3 cable from the panel is harder. Budget $250-450 for an electrician to run a new 30A circuit.
Electric Clothes Dryer electrical specifications
| Minimum wire gauge | 10 AWG copper |
| Breaker size | 30A 2-pole |
| Voltage | 240V (240V split-phase) |
| Typical draw | 4,000-5,500W (20-30A) |
| Dedicated circuit | Yes - no other loads on this breaker |
| Cable type | 10/3 NM-B (Romex) or 10 AWG THHN in conduit |
| Conductors | 2 hots + neutral + ground (4-wire for most 240V appliances) |
| GFCI required | Yes - NEC 210.8(A) |
| NEC reference | 220.54 |
Circuit requirements for electric clothes dryer
Dedicated 30A/240V circuit, 10/3 NM-B
A electric clothes dryer must have a dedicated circuit - no other appliances, outlets, or loads should share this breaker. This means running a new 10/3 or 6/3 NM-B cable from the electrical panel directly to the appliance location.
Wire sizing: The minimum wire for a 30A circuit is 10 AWG copper. For 240V circuits, use 10/3 NM-B cable (two hots, neutral, ground) for cable runs in walls, or 10 AWG THHN individual conductors in conduit for exposed runs. For wire runs over 75 feet, check voltage drop - you may need to upsize to 8 AWG to keep voltage drop under 3%.
Breaker sizing: A 30A breaker (double-pole, 240V) protects this circuit. The breaker must match or exceed the appliance nameplate rating but never exceed the wire capacity. 10 AWG copper is rated for well above 30A, providing adequate safety margin.
Installation notes
Laundry circuit rules: NEC 210.11(C)(2) requires at least one 20A branch circuit for the laundry area. Electric dryers require a separate dedicated 30A/240V circuit. Receptacles within 6 feet of the laundry sink require GFCI protection.
Receptacle type: Use a NEMA 14-30R receptacle for 30A/240V circuits (dryers, water heaters). This 4-prong outlet replaced the older 3-prong NEMA 10-30R in new construction per NEC 250.140.
Safety and code requirements
GFCI protection is required for this appliance location. Install GFCI protection at the breaker (GFCI breaker) or at the first receptacle in the circuit. See Laundry GFCI requirements for the full NEC rules and edition-by-edition changes.
Ground wire: The equipment grounding conductor (green or bare wire) must be continuous from the panel to the appliance. For a 30A circuit, the minimum ground wire is 10 AWG copper per NEC Table 250.122. NM-B cable includes the correct ground wire size automatically.
Permits: Most jurisdictions require an electrical permit for adding a new circuit. The inspector will verify wire size, breaker rating, grounding, and GFCI protection. Check your state’s NEC adoption and call your local building department before starting work.
Typical installation
The laundry circuit starts at the panel and runs to a receptacle box behind the dryer location. For a 240V dryer circuit, use a NEMA 14-30R 4-prong receptacle mounted at approximately 36 inches above the floor behind the dryer. Keep the receptacle accessible without moving the appliance if possible.
Estimated materials cost
For a typical 50-75 foot run, expect to spend approximately $85-$206 on materials:
| 10/3 NM-B cable (50-75 ft) | $45-$131 |
| 30A GFCI breaker | $40-$75 |
| Estimated materials total | $85-$206 |
Material costs are approximate based on retail pricing as of Feb 2026. Actual costs depend on cable length, local pricing, and copper market conditions. Does not include labor, permits, or inspection fees.
Frequently asked questions
What size wire do I need for a electric clothes dryer?
10 AWG copper on a 30A breaker at 240V. This is the minimum per NEC Table 310.16. For runs over 75 feet, check voltage drop and consider upsizing to 8 AWG.
Does a electric clothes dryer need a dedicated circuit?
Yes. A electric clothes dryer requires its own dedicated circuit - no other outlets or appliances can share the breaker.
Does a electric clothes dryer need GFCI protection?
Yes. Laundry locations require GFCI protection under NEC 210.8(A). Install a GFCI breaker or GFCI-protected receptacle.
Can I wire a electric clothes dryer myself?
In most states, homeowners can do their own electrical work on their primary residence with a permit and inspection. However, this is not a DIY task if you are unfamiliar with electrical work - improper wiring can cause fires or electrocution. Check your state licensing requirements and always get a permit.
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NEC 2023 references verified April 2026