Electric vehicle charging standard developed by Tesla
North American Charging System (SAE J3400)
NACS alternating current (AC)/direct current (DC) connector (center), shown between SAE J1772 (left) and Type 2 (right) AC connectors. Non-NACS DC connectors are even larger.
Type
Electric vehicle charging
Production history
Designer
Tesla, Inc.
Designed
2021
Standardized
pending
Manufacturer
Tesla, Volex
General specifications
Pins
5
Electrical
Max. voltage
277 Volt (V) AC
500 or 1,000 V DC
Max. current
In excess of 650 amperes (A)
Pinout
Pinouts for NACS, looking at end of plug (attached to electric vehicle supply equipment cord)
DC+/L1
DC+ / Line 1
Positive current (DC), Line 1 (split phase AC), Line (single phase AC)
DC−/L2
DC− / Line 2
Negative current (DC), Line 2 (split phase AC), Neutral (single phase AC)
G
Ground
full-current protective grounding system
CP
Control pilot
charging state/current signaling
PP
Proximity pilot
vehicle connector status signaling
References:[1][2]
The North American Charging System (NACS), being standardized as SAE J3400, is an electric vehicle (EV) charging connector system developed by Tesla, Inc. It has been used by all North American market Tesla vehicles since 2021 and was opened for use by other manufacturers in November 2022. It is backwards compatible with the proprietary Tesla connectors made before 2021.
Between May 2023 and February 2024, almost all other vehicle manufacturers have announced that their electric vehicles in North America will be equipped with the NACS charge port, starting in 2025. Several electric vehicle charging network operators and equipment manufacturers have also announced plans to add NACS connectors.
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