UL 414
Standard for Meter Sockets

DETAILS
Edition Number:9SCC Approved:--
Edition Date:2016-01-05DOD Approved: 1987-11-20
Price Code:DANSI Approved: 2016-01-05
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover meter sockets for use with:

    a)    Watthour and similar meters;

    b)    Test switches;

    c)    Metering transformer cabinets; and

    d)    Metering transformer cabinet interiors

    for installation in accordance with the National Electrical Code, NFPA 70.

    1.2 Meter sockets are marked with a continuous duty ampere rating and may in addition have a maximum use (intermittent) ampere rating of 125 percent or less of the continuous duty ampere rating.

    1.3 A meter socket, as covered by these requirements, is an assembly of wiring terminals and jaw type contacts for one or more plug-in watthour meters in an enclosure having provisions for securing the meter to the socket.

    1.4 Some meter sockets may be housed in a metal pedestal enclosure intended for mounting on a concrete slab or in a metal post enclosure intended to be sunk in the ground with or without concrete poured around the post at ground level and either self-supported or intended for separate support. Such posts or pedestals are not intended to serve as the sole support of masts for overhead wiring.

    1.5 Some meter sockets may be intended for mounting on a mounting post or pedestal for distribution equipment.

    1.6 As covered by these requirements, a meter socket does not include:

    a)    A meter,

    b)    An overcurrent device,

    c)    An instrument transformer,

    d)    An arcing or switching part, or

    e)    A similar component.

    A meter socket does not have provision for installation of instrument transformers within the meter socket enclosure.

    1.7 These requirements cover meter sockets rated:

    a)    300 volts alternating current or less, or 600 volts alternating current and

    b)    400 amperes maximum per meter position.

    1.8 These requirements cover metering transformer cabinets and metering transformer cabinet interiors rated maximum 6000 amperes at maximum 600 volts.

    1.9 As covered by these requirements, a metering transformer cabinet or metering transformer cabinet interior does not include the current transformers.

  • 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
        • ALL METER SOCKETS AND METERING TRANSFORMER CABINETS
          • CONSTRUCTION
          • 3 General
          • 4 Enclosure
          • 5 Bases – Insulating Material
          • 6 Current-Carrying Parts
            • 6.1 General
            • 6.2 Washers
            • 6.3 Test blocks
          • 7 Wiring Terminals
          • 8 Spacings
          • 9 Barriers
            • 9.1 Insulating barriers
            • 9.2 Restricting barriers
            • 9.3 Isolating barriers
          • 10 Wire-Bending Distance
          • 11 Wiring Space
          • 12 Provisions for Bonding and Grounding
          • PERFORMANCE
          • 13 General
          • 14 Heating Test
          • 15 Short-Circuit Current Test
          • 16 Short-Circuit Current Test with Specific Circuit Breaker
            • 16.1 General
            • 16.2 Test circuit calibration
            • 16.3 Sample preparation
            • 16.4 Closing
            • 16.5 Peak let-through current
          • 17 Rain Test
          • 18 Concentric Knockout Rain Test
          • 19 Insertion and Withdrawal Force Test for Meter Jaws
          • 20 Dielectric Voltage-Withstand Test
            • 20.1 General
            • 20.2 Insulating barriers
          • 21 Clamped Insulating Joint Test
          • 22 Bonding Continuity Test
          • 23 Test of Insertion and Withdrawal Force on Meter Base
          • 24 Strength Test of Insulating Base and Support
          • 25 Test of Torque and Force on Test Block
          • RATINGS
          • 26 Voltage and Current Ratings
          • MARKINGS
          • 27 General
            • 27.1 Location
            • 27.2 Identification
            • 27.3 Ratings
            • 27.4 Enclosure
            • 27.5 Top (overhead) or bottom (underground) feed
            • 27.6 Accessories
            • 27.7 Circuit closers and disconnects
            • 27.8 Neutral
            • 27.9 Field installation
            • 27.10 Terminals
            • 27.11 Test blocks
            • 27.12 Short circuit ratings
            • 27.13 Low voltage rating
          • 28 Permanence of Marking
        • POST AND PEDESTAL TYPE METER SOCKETS
          • CONSTRUCTION
          • 29 General
          • 30 Enclosure
          • 31 Ventilation Openings
          • 32 Mounting
          • 33 Grounding
          • 34 Grade Level
          • PERFORMANCE
          • 35 Sprinkler Test
          • 36 Crushing Deformation Test
          • 37 Torque Deformation Test
          • 38 Beam Loading Deflection Test
          • MARKINGS
          • 39 Post Type Enclosures
          • 40 Pedestal Type Enclosures
        • METERING TRANSFORMER CABINETS AND METERING TRANSFORMER CABINET INTERIORS
          • GENERAL
          • 41 Details
          • CONSTRUCTION
          • 42 General
            • 42.1 Cabinets and interiors
            • 42.2 Bus-to-bus and bus-to-wire connections
            • 42.3 Sizing of bus bars
            • 42.4 Spacings
          • PERFORMANCE
          • 43 Short-Circuit Test Performed
            • 43.1 General
            • 43.2 Tensile force
            • 43.3 Cantilever force
          • 44 Short-Circuit Test Not Performed
            • 44.1 General
            • 44.2 Construction
            • 44.3 Supports
            • 44.4 Bus bar rotation
          • RATINGS
          • 45 Details
          • MARKINGS
          • 46 Details
        • TEST SWITCHES
          • GENERAL
          • 47 Details
          • CONSTRUCTION
          • 48 General
          • PERFORMANCE
          • 49 Temperature Test
    • METER SOCKET ADAPTERS
    • APPENDIX A
    • APPENDIX B (Informative)