UL 1558
Standard for Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear

DETAILS
Edition Number:5SCC Approved:--
Edition Date:2016-02-18DOD Approved: --
Price Code:AANSI Approved: 2017-06-23
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover metal-enclosed low-voltage power circuit breaker switchgear assemblies containing but not limited to such devices as low-voltage power circuit breakers, other interrupting devices, switches, control, instrumentation and metering, protective and regulating equipment.

    1.2 These requirements cover equipment intended for use in ordinary locations in accordance with the National Electrical Code.

    1.3 These requirements are intended to supplement and be used in conjunction with the Standard for Metal-Enclosed Low Voltage Power Circuit Breaker Switchgear, ANSI C37.20.1, and the Standard for Conformance Testing of Metal-Enclosed Low-Voltage AC Power Circuit Breaker Switchgear Assemblies, ANSI C37.51.

    1.4 These requirements cover equipment rated 1000 V ac or less nominal, 1058 V ac maximum.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Glossary
          • 3 References
          • 4 General
        • CONSTRUCTION
          • 5 Accelerated Aging of Gaskets
          • 6 Primary or Power Carrying Circuits
            • 6.1 General
            • 6.2 Bus bars
          • 7 Grounding
          • 8 Control and Secondary Wiring
            • 8.1 General
            • 8.2 Wiring terminals – control circuits
          • 9 Location of Operating Means
          • 10 Receptacles
          • 11 Impact and Pressure – Viewing Panes
          • 12 Spacings
            • 12.1 General
            • 12.2 Details
            • 12.3 Insulating barriers
            • 12.4 Clamped joint
          • 13 Service Equipment Use
            • 13.1 General
            • 13.2 Neutral disconnecting means
            • 13.3 Equipment on supply side of disconnect
          • 14 Multiple Source Switchgear
          • 15 Corrosion Protection
          • 16 Wiring Space
            • 16.1 General
            • 16.2 Wire bending space and gutter width
            • 16.3 Clear wiring space
            • 16.4 Wiring
          • 17 Working Space
        • PERFORMANCE
          • 18 General
        • MARKING
          • 19 General
            • 19.1 Details
            • 19.2 Location
            • 19.3 Service equipment
            • 19.4 Ground fault protection
            • 19.5 Main devices
            • 19.6 Emergency circuits
            • 19.7 Transformers
            • 19.8 Rainproof
            • 19.9 Taps
        • INSTALLATION INSTRUCTIONS
          • 20 Field Testing of Ground-Fault Protection of Equipment