UL 753
Standard for Alarm Accessories for Automatic Water-Supply Control Valves for Fire-Protection Service

DETAILS
Edition Number:8SCC Approved:--
Edition Date:2013-10-25DOD Approved: --
Price Code:AANSI Approved: 2018-07-20
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover alarm accessories for automatic water-supply control valves for use in automatic sprinkler equipment for fire protection service. Accessories may include water motors and gongs, pressure-operated switches, and other electrical and nonelectrical attachments, components, or units commonly used with alarm, dry-pipe and pre-action valves.

    1.2 Requirements for the installation and use of alarm accessories with automatic water-supply control valves are included in the Standard for Installation of Sprinkler Systems, NFPA 13.

    1.3 The electrical alarm accessories for automatic water-supply control valves are intended for fire-protective signaling use in ordinary locations in accordance with the National Electrical Code, ANSI/NFPA 70.

  • 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 Adjustment and Stops
          • 7 Calibration Means
          • 8 Tampering Protection
          • 9 Materials
          • 10 Assembly
          • 11 Threaded Openings
          • 12 Operating Mechanisms
          • 13 Water Motors
          • 14 Gong and Gong Protection
          • 15 Strainers
          • 16 Enclosures
          • 17 Corrosion Protection
          • 18 Mounting
          • 19 Supply Connections
          • 20 Field Wiring Connections
          • 21 Leads
          • 22 Terminals
          • 23 Wiring Space
          • 24 Interconnection of Units
          • 25 Internal Wiring
          • 26 Switches
          • 27 Mercury-Tube Switches
          • 28 Insulating Material
          • 29 Current Carrying Parts
          • 30 Grounding and Bonding
          • 31 Spacings
          • 32 Servicing Protection
        • PERFORMANCE
          • 33 General
          • 34 Water Operated Accessories Test
            • 34.1 Response
            • 34.2 Endurance
            • 34.3 Intensity of alarm
          • 35 Pressure Actuated Accessory Test
            • 35.1 Sensitivity
            • 35.2 Strength of parts
          • 36 Elastomeric Parts Test
          • 37 Overload Test
          • 38 Endurance Test
          • 39 Dielectric Voltage-Withstand Test
          • 40 Short Circuit Test
          • 41 Strain-Relief Tests
            • 41.1 Flexible cords
            • 41.2 Field supply or internal leads
          • 42 Push-Back Relief Test
          • 43 Corrosion Tests
            • 43.1 General
            • 43.2 Hydrogen sulfide
            • 43.3 Sulfur dioxide-carbon dioxide
        • MANUFACTURING AND PRODUCTION TESTS
          • 44 General
        • MARKINGS
          • 45 General
          • 46 Cautionary And Warning
        • INSTRUCTIONS
          • 47 General
    • APPENDIX A