What Size Wire for EV Charger (Level 2)? — Complete Wiring Guide
A EV Charger (Level 2) requires 6 AWG copper with a 50A double-pole on a 240V dedicated circuit. Here is the complete NEC-compliant wiring guide.
EV Charger (Level 2) Wiring Details
A Level 2 EV charger (like Tesla Wall Connector, ChargePoint Home, or JuiceBox) typically draws 32-48 amps at 240V. The most common setup is a 40A continuous draw, which requires a 50A circuit (40A × 1.25 = 50A per NEC 625.41 continuous load requirement). Use 6 AWG copper wire with a 50A double-pole breaker. For a hardwired installation, use 6/2 NM-B with ground. For a plug-in unit, install a NEMA 14-50 receptacle with 6/3 NM-B.
NEC Code Reference
The wiring requirements for a EV Charger (Level 2) are governed by NEC Article 625. Always check the appliance nameplate for specific electrical requirements — the manufacturer's specifications take precedence over general guidelines. Your local AHJ (Authority Having Jurisdiction) may have additional requirements beyond the NEC.
Pro Tip
Consider future-proofing with a 60A circuit (6 AWG wire, 60A breaker) even if your current charger only draws 32A. As EV battery sizes grow, faster home charging becomes more valuable. The cost difference for 6 AWG vs 8 AWG wire is minimal compared to rewiring later. Also, install the circuit during any panel work or renovation — the labor is the expensive part, not the wire.
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.