EV Charger Continuous Load and Panel Impact
Continuous-load circuit ampacity (125% per NEC 625.41/625.42), breaker, conductor, new panel total, and headroom for an EVSE.
Formula and source
I_circuit = I_charger * 1.25 (continuous); recommended breaker = next standard size >= I_circuit; new_panel_load = existing_load + I_circuit; headroom = main - new_panel_load.
NEC 2023 (NFPA 70). Article 625 (625.41/625.42 continuous-load and load-management); 220.83/220.87 panel load; 310.16 conductor.
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