UL 363
Knife Switches

DETAILS
Edition Number:11SCC Approved:--
Edition Date:2011-08-12DOD Approved: --
Price Code:AANSI Approved: 2015-11-13
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover open knife switches for use in accordance with the National Electrical Code , ANSI/NFPA-70.

    1.2 These requirements cover switches with or without fuseholders; switches having individual bases intended for either front or rear wiring connection; and switch parts without bases intended for mounting on switchboards and panelboards. Switches may be single- or multi-pole and with or without quick-break or auxiliary contacts, except where such contacts are specifically required.

  • 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
        • CONSTRUCTION
          • 5 General
          • 6 Bases – Insulating Material
          • 7 Current-Carrying Parts
          • 8 Hinges and Blades
          • 9 Wiring Terminals
          • 10 Fuses and Fuseholders
          • 11 Spacings
        • PERFORMANCE
          • 12 General
          • 13 Temperature Test
          • 14 Overload Test
          • 15 Dielectric Voltage-Withstand Test
        • PERFORMANCE – 10kA MAXIMUM AVAILABLE FAULT CURRENT CIRCUITS
          • 16 General
          • 17 Short-Circuit Withstand Test
          • 18 Low-Level Dielectric Voltage-Withstand Test
          • 19 Closing Test
          • 20 Low-Level Dielectric Voltage-Withstand Test (Repeated)
          • 21 Test Calibration
        • PERFORMANCE – HIGHER THAN 10 kA AVAILABLE FAULT CURRENT CIRCUITS
          • 22 General
          • 23 Close-Open Test
          • 24 Dielectric Voltage-Withstand Test
          • 25 Short-Circuit Withstand Test
          • 26 Low-Level Dielectric Voltage-Withstand Test
          • 27 Closing Test
          • 28 Low-Level Dielectric Voltage-Withstand Test (Repeated)
          • 29 Galvanometers
          • 30 Circuit Measurement Verification
          • 31 Calibration of Test Circuit
            • 31.1 General
            • 31.2 Current
            • 31.3 Voltage
            • 31.4 Power factor
            • 31.5 Recovery voltage
        • RATINGS
          • 32 Voltage
          • 33 Current
          • 34 Withstand
        • MARKINGS
          • 35 Content