EV Charger Installation & Wiring Guides
Precision engineering tools and installation guides for residential and commercial Level 2 EVSE, hardwired terminals, NEMA receptacles, and continuous load sizing.
Featured Calculators & Engineering Tools
EV Charger Wire Size Calculator
Determine code-compliant copper and aluminum conductor gauges, breaker sizing, and thermal terminal ratings for 16A to 80A Level 2 chargers with automatic 125% continuous duty derating.
Conduit Fill Calculator
Verify trade-size raceway capacity across EMT, PVC Schedule 40/80, and Liquidtight conduit based on the NEC 40% fill limit for 3 or more conductors.
Understanding NEC Article 625 & Continuous Loads
Electric vehicle supply equipment (EVSE) is classified by NEC Section 625.42 as a continuous load (operating for 3 hours or more). Consequently, branch circuit conductors and overcurrent protection devices (breakers) must be sized at a minimum of 125% of the charger’s maximum rated continuous current (e.g., a 48A charger requires a 60A breaker and minimum 6 AWG copper rated at 75°C).
