UL 231
Standard for Power Outlets

DETAILS
Edition Number:10SCC Approved:--
Edition Date:2016-10-05DOD Approved: --
Price Code:CANSI Approved: 2016-10-05
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover power outlets, with or without integral mounting posts or pedestals, and power outlet fittings for use in accordance with the National Electrical Code, NFPA 70.

    1.2 A power outlet covered by these requirements, although not restricted to such use, is intended for use:

    a)    At outdoor locations such as on farms, at building sites, and the like, where power is required to operate portable, mobile, or temporarily installed equipment,

    b)    To supply power to a mobile home or a recreational vehicle, and

    c)    To supply shore power to boats.

    1.3 A power outlet may contain:

    a)    Attachment plug receptacles,

    b)    Circuit breakers,

    c)    Fuseholders,

    d)    Fused switches and facilities for watt-hour meters, and

    e)    Provisions for field installed circuit breakers or switches and fuses.

    1.4 Power outlet fittings covered by these requirements are intended for factory or field assembly into or in conjunction with power outlets designed for such assembly. Fittings may be panels or combination units incorporating receptacles, disconnecting means, overcurrent protection or other devices that have been determined to be equivalent. A separable mounting post or pedestal to which power outlets are to be mounted is also a fitting.

    1.5 In addition to or instead of mounting to a post or pedestal fitting as mentioned in 1.4, a power outlet may be constructed for mounting on and connection to a mounting post or pedestal also designed to be used with other types of distribution equipment.

    1.6 Some power outlets may have special features and markings to indicate their acceptability for use as service equipment.

    1.7 A power outlet with a mounting post is intended for mounting in concrete. A power outlet with a mounting pedestal is intended for mounting on a concrete slab. Unless marked otherwise, a mounting post or pedestal fitting is not intended to serve as the sole support of a mast for overhead wiring.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 General
            • 2.1 Components
            • 2.2 Units of measurement
            • 2.3 Undated references
          • 3 Glossary
        • CONSTRUCTION
          • 4 General
          • 5 Enclosure
            • 5.1 General
            • 5.2 Enclosure of switches and circuit breakers
            • 5.3 Enclosure of fuses
            • 5.4 Opening for cord
            • 5.5 Nonmetallic enclosures
            • 5.6 Dead front
            • 5.7 Doors and covers
            • 5.8 Meter socket base
            • 5.9 Ventilation openings
          • 6 Connections for Wiring Systems
          • 7 Mounting Posts and Pedestals
            • 7.1 General
            • 7.2 Cover
            • 7.3 Electrical connections
            • 7.4 Wire opening
            • 7.5 Bonding
            • 7.6 Overlap
            • 7.7 Instructions
            • 7.8 Pedestal
          • 8 Wiring Devices
            • 8.1 General
            • 8.2 Receptacles
            • 8.3 Operating mechanism
            • 8.4 Switches
            • 8.5 Ground-fault circuit protection for personnel
          • 9 Insulating Material
          • 10 Current-Carrying Parts
            • 10.1 General
            • 10.2 Terminals
            • 10.3 Spring washers
          • 11 Service Equipment Use
            • 11.1 General
            • 11.2 Mobile home service equipment
          • 12 Disconnecting Means
          • 13 Alternate Source Switching Means
          • 14 Overcurrent Protection
          • 15 Spacings
            • 15.1 General
            • 15.2 Insulating barriers
          • 16 Wiring Space
            • 16.1 General
            • 16.2 Wire-bending space
            • 16.3 Barriers
            • 16.4 Bushings
          • 17 Grounding and Bonding
            • 17.1 Ground bus
            • 17.2 Terminal for neutral service conductor
            • 17.3 Grounding electrode conductor terminal
            • 17.4 Main bonding jumper
            • 17.5 Grounding electrode conductor and main bonding jumper when sub-feed terminals are provided
            • 17.6 Equipment grounding terminal for 100-ampere rated mobile home
            • 17.7 Receptacle grounding
            • 17.8 Bonding
            • 17.9 Bonding means for metallic conduit
            • 17.10 Grounding and bonding connections
          • 18 Luminaires
        • PERFORMANCE
          • 19 Bonding Resistance and Conductor Tests
            • 19.1 Plug-in grounding means
            • 19.2 Reduced size bonding conductor
            • 19.3 Bonding connection
          • 20 Strength Test of Insulating Base and Support
          • 21 External Operating Mechanism Test
          • 22 Rain and Splash Test
            • 22.1 General
            • 22.2 Test description
          • 23 Spray Test
          • 24 Dielectric Test of Clamped Joint
          • 25 Dielectric Voltage-Withstand Test
          • 26 Short-Circuit Current Test
            • 26.1 General
            • 26.2 Testing of receptacles
            • 26.3 Short circuit procedure
            • 26.4 Evaluation of test results
          • 27 Conduit Connection Tests
            • 27.1 General
            • 27.2 Pullout
            • 27.3 Torque
            • 27.4 Bending
            • 27.5 Knockouts
          • 28 Short Time Fault Current Test
          • 29 Torque Deformation Test
          • 30 Beam Loading Deflection Test
        • RATINGS
          • 31 General
          • 32 Current
          • 33 Short Circuit Current
          • 34 Voltage
        • MARKINGS
          • 35 Details
          • 36 Permanence of Marking
        • INSTALLATION INSTRUCTIONS
          • 37 Mounting in Concrete
          • 38 Mounting of Marina Type Equipment
    • APPENDIX A