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EV charging glossary

Industry jargon

SAE J3400 / NACS

Also called: North American Charging System, NACS, J3400 SAE J3400 is the North American recommended practice that standardises the charging interface commonly known as the North American Charging System, or NACS. It covers physical and electrical requirements for a hand-mated coupler that can transfer either DC power or single-phase AC power. SAE issued the first J3400 version in December 2023 and revised it in September 2024. The standard gives the previously proprietary connector a published industry specification for wider vehicle and charging-equipment adoption. J3400 describes more than the shape of the plug. Charger manufacturers also need to account for the electrical, communication and safety requirements that apply to the complete charging implementation.

Related terms

Combined Charging System

SAE J1772

Connector type
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