UL 1773
Standard for Termination Boxes

DETAILS
Edition Number:5SCC Approved:--
Edition Date:2011-10-31DOD Approved: --
Price Code:CANSI Approved: 2016-04-29
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover termination boxes rated 600 V or less that consist of lengths of bus bars, terminal strips, or terminal blocks with provision for wire connectors to accommodate incoming or outgoing conductors or both and are intended to be used in accordance with the National Electrical Code, NFPA 70. Termination boxes are investigated for use on the line or load side of service equipment.

    1.2 The incoming and outgoing conductors may be routed through knockouts or openings in the box for cable, conduit, or electrical metallic tubing. The termination box may also have special openings to match with similar openings in other equipment such as meter sockets, panelboards, switch or circuit breaker enclosures, wireways, and the like.

    1.3 These requirements also cover termination bases to be field installed in termination boxes and termination boxes in which termination bases are to be field installed.

    1.4 This category covers mounting posts and pedestals rated 600 V ac or less intended to serve as a raceway for underground wiring that is being brought above grade to feed an outdoor electrical distribution device, such as a power outlet, panelboard, meter socket, circuit breaker enclosure or the like. They are intended to support the distribution device, which is installed either in the factory or in the field. They may contain electrical termination points for underground wiring and for wiring to the distribution device.

    1.5 These requirements do not cover equipment connected only by bus bars for both input and output circuits, nor equipment containing switching devices, relays, or overcurrent protective devices. These requirements also do not cover busway fittings known as "End Cable Tap Boxes" which are covered by the Standard for Busways, UL 857.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Components
          • 3 Units of Measurement
          • 4 Undated References
          • 5 Glossary
        • CONSTRUCTION
          • 6 Enclosure
            • 6.1 General
            • 6.2 Conduit connections
            • 6.3 Provision for support
            • 6.4 Enclosures containing inlet assemblies
          • 7 Mounting Post or Pedestal
            • 7.1 General
            • 7.2 Cover
            • 7.3 Grade level
            • 7.4 Wire opening
            • 7.5 Instructions
            • 7.6 Mounting provision
            • 7.7 Luminaires (illuminated mounting posts and pedestals)
          • 8 Ventilation Openings
          • 9 Wire Bending Space
          • 10 Wiring Terminals
            • 10.1 General
            • 10.2 Tightening torque
            • 10.3 Screw terminals
            • 10.4 Multiple pole power inlets
            • 10.5 Single pole power inlets
          • 11 Current-Carrying Parts
          • 12 Termination Bases
          • 13 Bases – Insulation Material
          • 14 Provision for Bonding and Grounding
          • 15 Spacings
            • 15.1 General
            • 15.2 Insulating barriers
        • PERFORMANCE
          • 16 Short-Circuit Current Test
          • 17 Strength Test of Insulating Base and Support
          • 18 Dielectric Voltage-Withstand Test
            • 18.1 General
            • 18.2 Clamped insulating joint
            • 18.3 Insulating barriers
          • 19 Torque Deformation Test
          • 20 Beam Loading Deflection Test
          • 21 Deflection Test
          • 22 Conduit Connection Tests
          • 22A Rain and Splash Test
          • 23 Inlet Assemblies
            • 23.1 General
            • 23.2 Temperature test – inlet assemblies
          • 23A Illuminated Mounting Posts and Pedestals
            • 23A.1 Temperature test
        • RATINGS
          • 24 General
          • 25 Short-Circuit Current
        • MARKINGS
          • 26 General
            • 26.1 Location
            • 26.2 External conditions
            • 26.3 Terminals
            • 26.4 Short circuit
            • 26.5 Special openings
            • 26.6 Use on line side of service equipment
            • 26.7 Grade level
            • 26.8 Conduit connections
            • 26.9 Inlet assemblies
            • 26.10 Illuminated mounting posts and pedestals
          • 27 Permanence of Marking
    • APPENDIX A