While this article provides guidance on hardware requirements for EV Charger installation, we always recommend consulting a licensed electrician. Selecting the appropriate wire gauge and breaker size is crucial for safety and optimal performance.
Wiring Requirements:
6 AWG copper wire (required for all installations)
Rated for 90C or higher
It must be copper, not aluminum
Rated for 125% of maximum charge rate (per NEC Article 310)
Breaker Size:
30A-60A range, based on configuration and desired charge rate
40A breaker for 30A charge rate
60A breaker for 48A charge rate (requires hardwiring)
NEC requires a 25% margin above the expected load
Important Notes:
Wire terminals in the EV Charger accommodate up to 6 AWG wire
Larger gauge (4 AWG) won't fit properly and creates safety hazards
Smaller gauges than 6 AWG may not safely handle the required current
Longer wire runs may require adjustments to prevent voltage drop
Copper wire is mandatory due to superior conductivity and reliability
For guidance on THHN vs. Romex/NM wiring, consult a professional electrician
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