UL 2251
Standard for Plugs, Receptacles, and Couplers for Electric Vehicles

DETAILS
Edition Number:4SCC Approved:--
Edition Date:2017-11-20DOD Approved: --
Price Code:BANSI Approved: 2017-11-20
Type:ulcsance

  • SCOPE

    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.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • UL Harmonized Standard Title Page
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Definitions
          • 3 Components
          • 4 Units of Measurement
          • 5 Normative References
        • CONSTRUCTION
          • 6 General
          • 7 Configurations
            • 7.1 General
            • 7.2 Contact sequencing
          • 8 Insulating Materials
            • 8.1 Flammability
            • 8.2 Electrical properties
            • 8.3 Thermal properties
          • 9 Protection against Corrosion
          • 10 Enclosures
            • 10.1 General
            • 10.2 Mechanical strength
            • 10.3 Nonmetallic enclosures
            • 10.4 Metallic enclosures
            • 10.5 EV plug, vehicle connector, and EV breakaway coupling enclosures
            • 10.6 Environmental enclosures
          • 11 Current-Carrying Parts
          • 12 Clearances and Creepage Distances
          • 13 Accessibility of Live Parts
          • 14 Grounding
          • 15 Grounding Connections
          • 16 Isolation
          • 17 Terminal Parts
          • 18 Contacts
          • 19 Assembly
          • 20 Separation of Circuits
            • 20.1 Factory wiring
            • 20.2 Separation barriers
            • 20.3 Field wiring
          • 21 Devices Intended to Accommodate a Fuse
          • 22 Cable Grip
          • 23 Sharp Edges
        • PERFORMANCE
          • 24 Representative Devices
          • 25 Accelerated Aging Tests
            • 25.1 Rubber compounds
            • 25.2 PVC compounds
          • 26 Mold Stress Relief Test
          • 27 Moisture Absorption Resistance
          • 28 Humidity Conditioning
          • 29 Insulation Resistance Test
          • 30 Dielectric Withstand Test
          • 31 Dew Point Test
          • 32 Conductor Secureness and Pullout Test
          • 33 Cable Secureness Test
          • 34 Impact Test (EV Plugs, Vehicle Connectors, and EV Breakaway Couplings)
          • 35 Crush Test
          • 36 Vehicle Driveover Test
          • 37 Withdrawal Force Test
            • 37.1 EV plugs and EV receptacles, vehicle connectors, and vehicle inlets
            • 37.2 EV breakaway couplings
          • 38 Grounding Path Current Test
          • 39 Short Circuit Test
            • 39.1 General
            • 39.2 Protective devices
            • 39.3 Calibration of test circuits
          • 40 Strength of Insulating Base and Support Test
          • 41 No-Load Endurance Test
          • 42 Endurance with Load Test
          • 43 Overload Test
          • 44 Electromagnetic Test (Pilot Contacts)
          • 45 Temperature Rise Test
          • 46 Fuseholder Temperature Test
          • 47 Surface Temperatures
          • 48 Resistance to Arcing Test
          • 49 Polarization Integrity Test
          • 50 Resistance to Corrosion Test
          • 51 Vibration Test
          • 52 Accelerated Aging Gasket Test
          • 53 Permanence of Marking Tests (Mexico and US)
          • 54 Enclosure Tests for Environmental Protection
        • RATINGS
          • 55 General
        • MARKINGS
          • 56 General
            • 56.1 Company name, catalog designation, electrical rating
            • 56.2 Multiple factories
            • 56.3 Nonconductive mounting means
            • 56.4 Disconnecting use only
            • 56.5 AC or DC only devices
            • 56.6 Cover grounded devices
            • 56.7 Fused devices
            • 56.8 Locking-type devices
            • 56.9 EV receptacle marking location
            • 56.10 Wiring information – field wiring terminals
            • 56.11 Overcurrent protection
            • 56.12 Environmental enclosures
            • 56.13 EV cable assembly markings
          • 57 Identification and Marking of Terminals
            • 57.1 General
            • 57.2 Grounded and grounding
            • 57.3 Other terminals
    • Annex A – Reference Standards (Normative)
    • Annex B – French and Spanish Translations(Informative)