UL 773A
Nonindustrial Photoelectric Switches for Lighting Control

DETAILS
Edition Number:6SCC Approved:--
Edition Date:2016-01-19DOD Approved: 1989-06-13
Price Code:CANSI Approved: 2018-05-25
Type:ulcsance

  • SCOPE

    1 Scope

    1.1 Requirements contained in this Standard cover controls of the light-sensitive or presence-sensitive types, or both; for indoor or outdoor service; intended for the control of indoor or outdoor loads up to a maximum of 20 A and maximum 347 V; intended for installations on 50 Hz or 60 HZ systems or DC up to 60 V (for US); and DC up to 42.4 V (for Canada); and intended to be installed in accordance with the National Electrical Code (NEC), NFPA 70, the Canadian Electrical Code (CE Code) Part I, CSA C22.2 No. 0, and NOM 001 SEDE.

    1.2 These requirements do not cover controls intended to be used under the following conditions:

    a)    Devices that are locking type, used for area or roadway lighting fixtures;

    b)    Devices that monitor or control safety critical loads or personal protection circuits;

    c)    Devices intended to be installed in areas designated hazardous locations;

    d)    Devices intended to be installed for manufacturing process control.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • UL Harmonized Standard Title Page
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 General
            • 2.1 Components
            • 2.2 Units of measurement
            • 2.3 Undated references
            • 2.4 Normative references
            • 2.5 Definitions
            • 2.6 Suitability for control of loads
            • 2.7 Grounding/Bonding Conductor
        • CONSTRUCTION
          • 3 Enclosures
            • 3.1 General
            • 3.2 Metal Enclosures
            • 3.3 Polymeric enclosure
            • 3.4 Snap-on covers
          • 4 Accessibility of Uninsulated Live Parts
          • 5 Openings in Enclosure
            • 5.7 Knockouts
          • 6 Provision for Mounting
          • 7 Protection Against Corrosion
          • 8 Supply Connections
            • 8.1 Permanently connected units
            • 8.2 Outlet-box-mounted units
            • 8.3 Cord-connected or direct plug-in units
            • 8.4 Receptacles Incorporated in Equipment
            • 8.5 Direct Plug-in
            • 8.6 Strain relief
            • 8.7 Bushings
          • 9 Bonding/Grounding
            • 9.7 Bonding/Grounding lead requirements
            • 9.8 Bonding/Grounding lead securement
          • 10 Current-Carrying Parts
          • 11 Internal Wiring
          • 12 Spacings
          • 13 Alternate Spacings – Clearances and Creepage Distances
            • 13.4 Limited power point determination
            • 13.5 Printed-wiring board abnormal operation test
          • 14 Bonding of Internal Parts for Bonding/Grounding
            • 14.1 General
            • 14.2 Construction and connection
          • 15 Polymeric Materials
          • 16 Coil Windings
          • 17 Air-Gap Switches
        • PERFORMANCE
          • 18 General
          • 19 Overload and Endurance Testing - General
            • 19.1 General
            • 19.2 Air-gap switch used in series with solid state switching devices
          • 20 Overload Test
          • 21 Endurance Test
          • 22 Temperature Test
          • 23 Dielectric Voltage-Withstand Test
          • 24 Operation Test
          • 25 Abnormal Switching Test
          • 26 Limited Short-Circuit Test for Solid-State Switching Control
          • 27 Rain Test
          • 28 Exposure to Humid Atmospheres
          • 29 Permanence of Marking Tests
            • 29.1 Requirements for pressure sensitive labels
            • 29.2 Oven-aging test
            • 29.3 Immersion test
            • 29.4 Standard-atmosphere test
            • 29.5 Unusual-conditions exposure test
          • 30 Bonding/Grounding Connection Tests
            • 30.1 Creep and mold stress relief
            • 30.2 Overcurrent tests
            • 30.3 Impedance test
          • 31 Leakage Current Test
          • 32 Leakage Current Following Humidity Conditioning Test
          • 33 Power Supply Abnormal Tests
            • 33.1 General
            • 33.2 Output loading
            • 33.3 Power supply burnout
            • 33.4 Power supply abnormal test
          • 34 Component Breakdown Test
            • 34.1 Effects on equipment
            • 34.2 Effects on controlled load
            • 34.3 Component evaluation
          • 35 Strain Relief and Lead Securement Tests
            • 35.1 Strain relief – cord-connected device
            • 35.2 Lead securement - for self enclosed devices with nipples
            • 35.3 Lead securement – outlet box mounted devices
          • 36 Knockout Test
          • 37 Mechanical integrity
            • 37.1 Impact test for outdoor devices
            • 37.2 Crush test
          • 38 Conduit Connection to Enclosure Tests
            • 38.1 Polymeric Enclosures
            • 38.2 Metallic enclosure threaded opening test
            • 38.3 Metallic enclosure conduit hub test
          • 39 Snap-On Cover Test
          • 40 Tests on 120V Devices with Varistors
            • 40.3 Test requirements
        • MANUFACTURING AND PRODUCTION TESTS
          • 41 Dielectric Voltage-Withstand Test
        • RATINGS, MARKINGS AND INSTRUCTIONS
          • 42 Details
          • 43 Instructions
          • 44 Marking requirements for minimum outlet box volume