EV Charging Infrastructure: Code Requirements for 2026

The Growth of EV Charging

Electric vehicle sales in the United States have grown from under 2% of new car sales in 2020 to over 25% in 2025. This growth has created massive demand for charging infrastructure in residential, commercial, and public spaces. Electricians who understand the code requirements for EV charging installations are positioning themselves for one of the fastest-growing segments of the trade.

Article 625: Electric Vehicle Power Transfer System

Article 625 of the NEC is the primary code section governing EV charging equipment. The 2026 edition includes several important updates:

Wiring Methods and Conductor Sizing

• Branch circuits supplying EV charging equipment must be sized for continuous duty (125% of the maximum load) unless the circuit has listed overcurrent protection for continuous operation at 100%
• Dedicated branch circuits are required for each EV charging station in dwelling units
• The receptacle outlet for a cord-and-plug connected EVSE in a dwelling unit garage must be on a dedicated branch circuit rated not less than 40 amperes

Load Management Systems

One of the most practical new provisions allows electric vehicle power management systems (EVPMS). These systems allow multiple EV chargers to share electrical capacity by dynamically managing the load:

• An EVPMS must be listed for the application
• The system must automatically manage the load so that the total demand does not exceed the rating of the supply circuit or feeder
• This allows a property to install more charging stations than the electrical service would normally support, by staggering charging times and rates

Bidirectional Power Transfer

The 2026 NEC adds provisions for bidirectional EV charging, which allows power to flow from the vehicle battery back into the building or the grid:

• Vehicle-to-home (V2H) systems can provide backup power during outages
• Vehicle-to-grid (V2G) systems allow vehicles to supply power to the electrical grid during peak demand
• Bidirectional systems must comply with interconnection requirements similar to those for generators and solar PV systems
• Anti-islanding protection is required to prevent backfeed onto utility lines during an outage

Dwelling Unit Requirements

For residential installations:

• The 2026 NEC includes updated load calculation methods in Article 220 that provide demand factors for dwelling unit EV charging, reducing the impact on service sizing
• New construction is increasingly required by state and local amendments to include EV-ready wiring (conduit and panel space) even if a charger is not installed at the time of construction
• GFCI protection is required for EV charging outlets in garages and outdoors

Commercial and Fleet Charging

Fleet charging installations present unique challenges:

• Ventilation requirements for indoor charging areas have been updated, particularly for facilities charging large numbers of vehicles
• DC fast charging equipment may require significant electrical infrastructure upgrades, including dedicated transformers and switchgear
• Cable management systems are addressed to prevent tripping hazards and cable damage in high-traffic areas

Getting Started

If you are not yet doing EV charging work, now is the time to learn. Demand is growing faster than the supply of qualified electricians. Start by reading Article 625 in its entirety, then look at the load calculation provisions in Article 220 for EV-specific demand factors.