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Article 625 of the 2026 National Electrical Code covers the installation requirements for Electric Vehicle Power Transfer Systems, including electric vehicle charging equipment, power transfer equipment, wireless power transfer systems, and bidirectional energy systems. This article establishes the rules for safely connecting electric vehicles to premises wiring for charging, power export, and two-way energy flow.
As electric vehicles continue to become more common, Article 625 has become one of the fastest-growing areas of the NEC. It provides requirements for the equipment, installation methods, circuit protection, grounding, disconnecting means, and safety features needed to support modern EV infrastructure.
📁 Article 625 General Requirements for Electrical Installations
📁 Article 625 General Requirements for Electrical Installations
↳ Wireless Charging Still Follows the Rules
↳ The Protection Behind EV Charging
↳ How EV Systems Interact With Modern Power Systems
↳ How EV Systems Stay Safe During Service
↳ Why EV Chargers Need Dedicated Power
↳ Why EV Charging Cords Are Built Different
↳ EV Charging in the NEC scope and requirements
↳ EV Charging Cords and Cables
What Article 625 Covers
What Article 625 Covers
Article 625 applies to electrical conductors and equipment that connect an electric vehicle to a building’s electrical system. This includes:
⚡ Electric Vehicle Supply Equipment (EVSE)
⚡ Charging equipment
⚡ EV connectors and attachment plugs
⚡ Power export equipment
⚡ Bidirectional charging systems
⚡ Wireless power transfer equipment
The article has expanded beyond simple charging because some EV systems can now send power back into a building or electrical system.
Key Topics Inside Article 625
Key Topics Inside Article 625
⚡ Scope — 625.1
⚡ Scope — 625.1
Defines what equipment and systems fall under Article 625, including charging, power export, and bidirectional current flow applications.
⚡ Qualified Persons — 625.4
⚡ Qualified Persons — 625.4
Addresses who is permitted to install permanently installed EV power transfer equipment, emphasizing proper training and qualified installation practices.
⚡ Equipment Requirements
⚡ Equipment Requirements
Covers listing, ratings, construction, and installation requirements for EV equipment to ensure it is suitable for the environment and application.
⚡ Circuit Sizing and Load Considerations
⚡ Circuit Sizing and Load Considerations
EV charging loads are treated as significant electrical loads and require proper sizing of conductors, feeders, and services based on equipment ratings and NEC requirements.
⚡ Grounding and Safety
⚡ Grounding and Safety
Proper grounding, bonding, and protection are critical because EV systems connect large energy sources to building electrical systems.
⚡ Disconnecting Means
⚡ Disconnecting Means
Provides requirements for disconnecting EV equipment where required to allow safe maintenance and emergency operation.
⚡ Wireless Power Transfer
⚡ Wireless Power Transfer
Covers systems that transfer energy without a direct electrical connection, while still requiring proper installation, grounding, and safety practices.
Why Electricians Should Know Article 625
Why Electricians Should Know Article 625
The electrical industry is moving toward more EV infrastructure, and electricians will increasingly encounter:
🔋 Residential EV chargers
🏢 Commercial charging stations
🚗 Fleet charging systems
⚡ Battery backup integration
🔄 Vehicle-to-building and vehicle-to-grid systems
Understanding Article 625 helps electricians properly size circuits, understand equipment requirements, avoid inspection issues, and safely install the next generation of electrical systems.
Key takeaway:
Electric vehicles may be the future of transportation, but they still depend on the same fundamentals every electrician knows — proper conductors, overcurrent protection, grounding, bonding, and safe installation practices.
Article 625 connects the future of transportation with the fundamentals of electrical safety.
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