1 Scope

1.1 These requirements cover EV plugs, EV receptacles, vehicle inlets, vehicle connectors, and EV breakaway couplings, rated up to 800 amperes and up to 600 volts ac or dc. These devices are intended for use with conductive electric vehicle supply equipment (EVSE), and are intended to facilitate the conductive connection from the EVSE to the vehicle. These devices are for use in either indoor or outdoor nonhazardous locations in accordance with Annex A, Ref. No. 1.

1.2 This Standard does not directly apply to any device that is not intended for use as described in 1.1.

1.3 In the text of this Standard, the term "device" refers to any product covered by this Standard. The letters "EV" refer to an electric vehicle, including plug-in hybrid vehicles, hybrid vehicles, electric vehicles, battery electric vehicles, and similar vehicles.

Summary of Topics

This Fourth Edition of the Standard for Plugs, Receptacles, and Couplers for Electric Vehicles, UL 2251, is being issued to incorporate the following:

Revised Product Designations

Clarification of Scope and Products Not Covered by UL 2251

Addition of New Definition for Grounding/Bonding Conductor

Clarification to Ratings and Required Designation of Ratings

Clarification of the Fused Devices Requirement

Clarification of Cable Requirements for the Impact Test

Revised Requirements for Metallic Enclosures

Revised Requirements for Pollution Degree

Revision to the Temperature Rise Test

New Requirements for Device Configurations in Relation to Pin Lengths and Speed of Disconnection

Reinstatement of the Overload Test Conditions for Connectors "Not Intended for Current Interruption"

Revision to Address the Environmental Rating of Internal Parts

Removal of National Differences for Canada