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.