UL 1951
Standard for Electric Plumbing Accessories

DETAILS
Edition Number:2SCC Approved:--
Edition Date:2011-07-22DOD Approved: --
Price Code:BANSI Approved: 2017-08-25
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover equipment connected to or used with plumbing in commercial or household locations. Examples of equipment covered by these requirements are irrigation equipment, sprinkler controls, pedicure spas, water controls located in kitchens and bathrooms, electric faucets, toilets and toilet flushing systems. All equipment is intended for installation and use in accordance with the National Electrical Code, NFPA 70, and is rated 600 volts or less.

    1.2 These requirements do not cover pumps, dishwashers, washing machines, or other equipment connected to plumbing that is covered by individual requirements.

    1.3 These requirements do not cover refrigeration systems or controls that regulate water temperature, or equipment for use in hazardous locations as defined in the National Electrical Code, NFPA 70.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • PART 1 – ALL EQUIPMENT
          • INTRODUCTION
          • 1 Scope
          • 2 Units of Measurement
          • 3 Undated References
          • 4 Glossary
          • CONSTRUCTION
          • 5 Components
            • 5.1 General
            • 5.2 Attachment plugs and receptacles
            • 5.3 Batteries and battery chargers
            • 5.3A Button or coin cell batteries of lithium technologies
            • 5.4 Capacitors and filters
            • 5.5 Controls
            • 5.6 Cords, cables, and internal wiring
            • 5.7 Ground-fault, arc-fault, and leakage current detectors/interrupters
            • 5.8 Heaters, heating elements and pads
            • 5.9 Insulation systems
            • 5.10 Light sources and associated components
            • 5.11 Overcurrent protection
            • 5.12 Power supplies
            • 5.13 Printed wiring boards
            • 5.14 Quick-connect wire connectors
            • 5.15 Semiconductors and small electronic components
            • 5.16 Supplemental insulation, insulating bushings, and assembly aids
            • 5.17 Switches
            • 5.18 Terminal blocks
            • 5.19 Transformers
            • 5.20 Valves (electrically operated) and solenoids
            • 5.21 Wire connectors
            • 5.22 Thermistors
          • 5A Safety Critical Functions
          • 6 Frame and Enclosure
            • 6.1 General
            • 6.2 Barriers
            • 6.3 Doors and covers
            • 6.4 Cast metal
            • 6.5 Sheet metal
            • 6.6 Nonmetallic enclosures
            • 6.7 Outdoor-use enclosures
            • 6.8 Button or coin cell batteries of lithium technologies
          • 7 Mounting
            • 7.1 Permanently connected units
            • 7.2 Cord-connected units
          • 8 Protection Against Corrosion
          • 9 Accessibility of Uninsulated Live Parts, Film-Coated Wire, and Moving Parts
          • 10 Field Connections
            • 10.1 General
            • 10.2 Equipment permanently connected electrically
            • 10.3 Equipment cord connected
            • 10.4 Strain relief
            • 10.5 Bushing
          • 11 Adhesives Used to Secure Parts
          • 12 Mechanical Assembly
          • 13 Current-Carrying Parts
          • 14 Insulating Material
          • 15 Internal Wiring
            • 15.1 Mechanical protection
            • 15.2 Splices and connections
          • 16 Separation of Circuits
            • 16.1 General
          • 17 Grounding and Bonding
            • 17.1 General
            • 17.2 Grounding means
            • 17.3 Terminals and leads
            • 17.4 Grounding identification
            • 17.5 Bonding
          • 18 Lampholders
          • 19 Motors
          • 20 Overcurrent- or Overload-Protective Devices
            • 20.1 General
          • 21 Capacitors
          • 22 Switches and Controls
          • 23 Controls – End Product Test Parameters
            • 23.1 General
            • 23.2 Auxiliary controls
            • 23.3 Operating controls (regulating controls)
            • 23.4 Protective controls (limiting controls)
            • 23.5 Controls using a temperature sensing device
          • 24 Electronic Circuits
            • 24.1 General
            • 24.2 Electronic circuits evaluated to UL 60335-1 based requirements
          • 25 Diaphragms, Gaskets, and Seals
          • 26 Spacings
          • 26A Clearance and creepage distances
          • 26B Switch Mode Power Supplies
            • 26B.1 Bridging components – switch mode power supplies
            • 26B.2 Transformer insulation system
          • PROTECTION AGAINST INJURY TO PERSONS
          • 27 General
          • 28 Sharp Edges
          • 29 Enclosures and Guards
          • 30 Materials
          • 31 Rotating or Moving Members
          • 32 Parts Subject to Pressure
          • 33 Pressure-Relief Devices
          • 34 Switches, Controls, and Interlocks
          • 35 Printed-Wiring Boards
          • 36 Marking
          • 37 Permanence of Marking
          • PERFORMANCE
          • 38 General
          • 39 Power Input Test
          • 40 Leakage Current Test
          • 41 Leakage Current Following Humidity Conditioning Test
          • 42 Insulation Resistance Following Humidity Conditioning Test
          • 43 Continuity of Grounding Circuit Test
          • 44 Starting-Current Test
          • 45 Temperature Test
          • 46 Dielectric Voltage-Withstand Test
          • 47 Rain Test
          • 48 Strain Relief Test
          • 49 Accelerated Aging Test
          • 50 Overload Test on Switches and Controls
          • 51 Operational Test
          • 52 Radiation Test
          • 53 Abnormal Operation Test
            • 53.1 General
            • 53.2 Electronic components
            • 53.3 Switch mode power supplies
            • 53.4 Tests for circuits evaluated to UL 60335-1 based requirements
          • MANUFACTURING AND PRODUCTION TESTS
          • 54 Dielectric Voltage-Withstand Test
          • 55 Grounding-Continuity Test
          • RATINGS
          • 56 Details
          • MARKING
          • 57 Details
          • 58 Cautionary Markings
        • PART II – SPECIFIC EQUIPMENT
          • COMMERCIAL PEDICURE SPAS
          • 59 General
          • 60 Scope
          • 61 Construction
            • 61.1 General
          • 62 Performance
            • 62.1 Temperature Test
          • 63 Markings
            • 63.1 Details
          • TOILETS WITH ELECTRIC FLUSHING FEATURES
          • 64 General
          • 65 Construction
            • 65.1 General
          • 66 Performance
            • 66.1 Temperature test
          • 67 Markings
            • 67.1 Details