UL 778
Standard for Motor-Operated Water Pumps

DETAILS
Edition Number:6SCC Approved:--
Edition Date:2016-07-07DOD Approved: 1991-03-11
Price Code:CANSI Approved: 2019-01-17
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover submersible and nonsubmersible motor-operated pumps intended to be used in ordinary locations in accordance with the National Electrical Code, NFPA 70.

    1.2 These requirements do not cover pumps rated more than 600 volts, pumps using universal motors rated more than 250 volts, pumps for fire protection service, pumps for use as or with swimming or wading pool equipment, therapeutic baths, and similar equipment, nor pumps covered by other individual requirements. These requirements do not cover pressure controls or pressure tanks that are intended for use in water or other liquid systems. These requirements do not cover pumps intended for corrosive or flammable fluids. These would include but not be limited to gasoline, kerosene, oil, chemicals, and pesticides.

    1.3 A pump not covered by any of the definitions in Definitions, Section 4, and a pump intended for use with liquids other than water, shall be evaluated on the basis of its compliance with the requirements in this standard, and further examination and tests required to determine whether it is acceptable for the purpose. This would include but not be limited to pumps intended for water/glycol and similar mixtures intended for use in hot water radiant heating or thermal solar applications.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • PART 1 – ALL SUBMERSIBLE AND NON-SUBMERSIBLE MOTOR-OPERATED PUMPS
          • INTRODUCTION
          • 1 Scope
          • 2 Units of Measurement
          • 3 Undated References
          • 4 Definitions
          • 5 Instructions Provided With the Pump
          • 6 Safety Critical Functions
          • CONSTRUCTION
          • 7 General
          • 8 Component Specifications
            • 8.1 Components
            • 8.2 Fuses
            • 8.3 Fuseholders
            • 8.4 Printed wiring boards
            • 8.5 Quick-connect wire connectors
            • 8.6 Terminal blocks
            • 8.7 Wire connectors
            • 8.8 Isolation devices
            • 8.9 Switch mode power supply insulation system – Triple-insulated magnet wire
          • 9 Adhesives Used to Secure Parts
          • 10 Electrical and Fire Enclosures
            • 10.1 General
            • 10.2 Enclosures of secondary circuits
          • 11 Parts in Contact with Potable Water
          • 12 Provision for Servicing
          • 13 Mechanical Assembly
          • 14 Protection Against Corrosion
          • 15 Accessibility of Uninsulated Live Parts, Film-Coated Wire, and Moving Parts
          • 16 Supply Connections
            • 16.1 General
            • 16.2 Terminal compartments
            • 16.3 Field wiring terminals and leads
            • 16.4 Identified terminals and leads
            • 16.5 Strain relief
            • 16.6 Bushings
            • 16.7 Contractor pumps
            • 16.8 Deep-well submersible pumps
            • 16.9 Sump pumps and portable pumps
            • 16.10 Cord-connected pumps
            • 16.11 Fountain pumps
            • 16.12 Elevator hoistway sump pumps
          • 17 Current-Carrying or Live Parts
          • 18 Insulating Material
          • 19 Internal Wiring
            • 19.1 Mechanical protection
            • 19.2 Splices and connections
          • 20 Spacings
            • 20.1 At field-wiring terminals
            • 20.2 In a motor
            • 20.3 Spacings other than in a motor or at field-wiring terminals
          • 21 Insulating Barriers
          • 22 Clearance and Creepage Distances
          • 23 Separation of Circuits
            • 23.1 Separation between different internal wiring circuits (factory-installed conductors)
            • 23.2 Separation between different field wiring circuits (field-installed conductors)
            • 23.3 Separation between field wiring circuits (field-installed conductors) and internal wiring circuits (factory-installed conductors)
            • 23.4 Segregation methods
            • 23.5 Separation methods
          • 24 Grounding
            • 24.1 General
            • 24.2 Bonding
            • 24.3 Grounding identification
            • 24.4 Double insulation
          • 25 Motors
            • 25.1 Construction
            • 25.2 Overload protection
          • 26 Overload-Protective Devices
          • 27 Capacitors
          • 28 Switches and Controls
          • 29 Line Voltage Submersible Pumps with Submersible Luminaires
          • PROTECTION AGAINST INJURY TO PERSONS
          • 30 Sharp Edges
          • 31 Materials
          • 32 Stability
          • 33 Polymeric Motor Supports
          • 34 Parts Subject to Pressure
          • 35 Pressure-Relief Devices
          • 35A Button or Coin Cell Batteries of Lithium Technologies
          • PERFORMANCE
          • 36 Leakage Current Test
          • 37 Leakage Current Test Following Humidity Conditioning
          • 38 Starting Current Test
          • 39 Input Test
          • 40 Temperature Test
            • 40.1 General
            • 40.2 Maximum normal load
          • 41 Dielectric Voltage-Withstand Test
            • 41.1 General
            • 41.2 Secondary circuits
          • 42 Oil Dielectric Voltage-Withstand Test
          • 43 Resistance to Moisture Test
          • 44 Submersion Test
          • 45 Flooding Test
          • 46 Insulation Resistance Test
          • 47 Test for Deterioration of Parts Subject to Flexing
          • 48 Test for Reliability of Parts Not Subject to Flexing
          • 49 Metallic Coating Thickness Test
          • 50 Switches and Controls Test
          • 51 Strain Relief Tests
          • 52 Operation Test
          • 53 Abnormal Operation Test
            • 53.1 Dry operation
            • 53.2 Burnout test
            • 53.3 Component breakdown test
            • 53.4 Low-voltage luminaire dry operation test
            • 53.5 Transformer overload test
            • 53.6 Switch mode power supply overload test
            • 53.7 Secondary circuits tests
          • 54 Permanence of Markings
          • MANUFACTURING AND PRODUCTION-LINE TESTS
          • 55 Dielectric Voltage-Withstand Test
          • 56 Grounding Continuity Test
          • RATINGS
          • 57 Details
          • MARKINGS
          • 58 Details
          • 59 Cautionary
          • INSTRUCTION MANUAL
          • 60 General
          • 61 Installation and Operating Instructions
          • 62 Grounding Instructions
        • PART 2 – PORTABLE FOUNTAIN PUMPS POWERED BY SEPARATE CLASS 2 SOURCES
          • CONSTRUCTION
          • 63 General
          • 64 Power Supply
          • 65 Low-Voltage Luminaires
          • PERFORMANCE
          • 66 Input
          • RATING
          • 67 General
          • MARKINGS
          • 68 General
          • MANUFACTURING AND PRODUCTION-LINE TESTS
          • 69 General
    • SECONDARY CIRCUITS EVALUATED TO NEC CLASS 2 DERIVED REQUIREMENTS