EV Charger Level 2 (240V, 48A): Wiring Requirements

Wiring a ev charger level 2 (240v, 48a) correctly means running 6 AWG copper on a dedicated 60-amp circuit. This guide covers the complete wiring requirements per NEC 2023, including wire gauge, breaker size, cable type, and installation specifics for your home. Whether you are hiring an electrician or planning the circuit yourself, the specifications below ensure your installation meets code.

What usually triggers this search

You bought an EV and the Level 1 charger that came with it adds 4 miles of range per hour. You need a Level 2 charger and you're figuring out whether your panel can handle it and what the circuit run looks like.

What goes wrong

The 48A charger is the sweet spot for home charging but the circuit math trips people up. A 48A continuous load requires a 60A breaker (NEC 210.20 requires breaker at 125% of continuous load). That means 6 AWG copper or 4 AWG aluminum. The most common installation failure: putting a 48A EVSE on a 50A breaker. It works initially, but the breaker is operating at 96% of its rating during every charge cycle, which is above the 80% continuous load limit. It will eventually trip or degrade. Second problem: garage sub-panels fed by undersized feeders. The house was wired with a 60A sub-panel to the garage, and there isn't enough capacity to add a 60A EV circuit on top of existing loads.

What the inspector checks

• 60A breaker minimum for 48A continuous load (125% rule per 210.20)
• 6 AWG copper or 4 AWG aluminum minimum
• GFCI protection per 625.54 (most EVSEs have this built-in)
• Dedicated circuit with no other outlets or loads
• If hardwired, disconnect within sight of the EVSE

Should you hire an electrician?

Installing a plug-in EVSE into an existing NEMA 14-50R or 6-50R outlet is plug-and-play. But running the 60A circuit from the panel is heavy work: 6 AWG cable is stiff and hard to pull, and the breaker connection in the panel requires care. Most EV charger installations run $500-1,200 for the electrical work depending on distance from the panel. Some utilities offer rebates that offset the cost.

EV Charger Level 2 (240V, 48A) electrical specifications

Circuit requirements for ev charger level 2 (240v, 48a)

60A circuit, 6 AWG wire, ~37 miles range per hour

A ev charger level 2 (240v, 48a) 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 60A circuit is 6 AWG copper. For 240V circuits, use 6/3 NM-B cable (two hots, neutral, ground) for cable runs in walls, or 6 AWG THHN individual conductors in conduit for exposed runs. For wire runs over 75 feet, check voltage drop - you may need to upsize to 4 AWG to keep voltage drop under 3%.

Breaker sizing: A 60A breaker (double-pole, 240V) protects this circuit. The breaker must match or exceed the appliance nameplate rating but never exceed the wire capacity. 6 AWG copper is rated for well above 60A, providing adequate safety margin.

Installation notes

General wiring notes: Run the cable from the electrical panel to the appliance location using the most direct path through walls, floors, or attic space. Keep cable runs as short as practical to minimize voltage drop. Secure NM-B cable with staples within 12 inches of each box and every 4.5 feet along the run per NEC 334.30.

Receptacle type: A 60A circuit is typically hardwired rather than using a plug-and-cord connection. If a receptacle is needed, use a NEMA 14-60R or the specific connector required by the appliance.

Safety and code requirements

GFCI: GFCI protection depends on the installation location. Kitchen, bathroom, garage, outdoor, basement, and laundry locations all require GFCI. See our GFCI guide by room to check whether your specific location requires it.

Ground wire: The equipment grounding conductor (green or bare wire) must be continuous from the panel to the appliance. For a 60A 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 typical installation involves running 6/3 NM-B cable from the electrical panel to the appliance location. Route the cable through wall cavities, floor joists, or attic space using the most direct path. Secure the cable with staples within 12 inches of each box and every 4.5 feet along the run. At the appliance end, connect to the appropriate receptacle or junction box.

Estimated materials cost

For a typical 50-75 foot run, expect to spend approximately $165-$435 on materials:

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

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NEC 2023 references verified April 2026