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The 2023 National Electrical Code (NEC) introduced several key updates that directly impact how EV chargers are installed. Staying compliant not only ensures safety but also positions your business as a trusted expert in the growing EV market.
Key Changes in Article 625 – EV Power Transfer Systems
- Dedicated Circuits Required: EV chargers must be installed on their own branch circuit (625.40).
- Overcurrent Protection: Must follow manufacturer specs or NEC tables (625.41).
- GFCI Protection: Now required for all cord-and-plug connected EVSE (625.54).
- Bidirectional Charging Support: New rules for vehicle-to-grid (V2G) systems (625.60).
Surge Protection Now Mandatory
- Article 230.67 & 242: SPDs (Surge Protection Devices) are now required for all dwelling unit services—critical for protecting EVSE from voltage spikes.
Smarter Load Calculations
- Article 220: Updated methods for calculating EVSE loads help avoid over-sizing panels and improve energy efficiency.
Enhanced Ground-Fault Protection
- Applies to both hardwired and plug-in EV chargers, especially in garages and outdoor installations.
Learn more: NFPA.org – NEC 2023 Overview