UL 1453
Standard for Electric Booster and Commercial Storage Tank Water Heaters

DETAILS
Edition Number:6SCC Approved:--
Edition Date:2016-03-29DOD Approved: --
Price Code:BANSI Approved: 2018-05-18
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover electric booster water heaters, electric commercial storage tank water heaters, and remote control assemblies for such heaters, rated 600 volts or less, to be employed in ordinary locations in accordance with the National Electrical Code, NFPA 70, and that meet at least one of the following conditions:

    a)    Over 120 gallons (454 L) in capacity;

    b)    Rated over 12 kilowatts; or

    c)    Equipped with one or more temperature-regulating controls that permit a water temperature of more than 85°C (185°F).

    1.2 These heaters are intended for installation in accordance with model mechanical and plumbing codes.

    1.3 An electric water heater not exceeding 120 gallons (454 L) capacity, rated no more than 12 kilowatts, and equipped with a temperature-regulating thermostat having no marked dial setting more than 77°C (171°F) and provided with a stop to prevent adjustment to a higher setting, shall be judged in accordance with the requirements in the Standard for Household Electric Storage Tank Water Heaters, UL 174.

    1.4 These requirements do not cover electric boilers, commercial cooking appliances, medical and dental equipment, or other electric heating equipment or appliances that are covered in or as part of individual requirements that are separate from this standard. Electrode type boilers are not covered by these requirements.

    1.5 In the following text, a requirement that applies only to booster water heaters or to commercial storage-tank water heaters is so identified by a specific reference in that requirement to the equipment involved. Absence of such a specific reference or use of the term water heater indicates that the requirement applies to all of the equipment covered in this standard unless the context indicates otherwise.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Components
          • 3 Units of Measurement
          • 4 Undated References
          • 5 Glossary
        • CONSTRUCTION
          • 6 Frame and Enclosure
            • 6.1 General
            • 6.2 Enclosure materials
            • 6.3 Emission of burning particles or molten metal
            • 6.4 Accessibility of live parts
            • 6.5 Ventilation openings
          • 7 Heating Element Accessories
          • 8 Doors and Covers
          • 9 Mechanical Assembly
          • 10 Corrosion Resistance
          • 11 Supply Connections – Permanent Connection
            • 11.1 General
            • 11.2 Wiring compartments
            • 11.3 Field wiring terminals and leads
          • 12 Supply Connections – Cord Connection
            • 12.1 Supply cord
            • 12.2 Bushings
            • 12.3 Strain relief
            • 12.4 Pin terminals
          • 13 Current-Carrying Parts
          • 14 Internal Wiring
            • 14.1 General
            • 14.2 Methods
          • 15 Splices
          • 16 Separation of Circuits
          • 17 Barriers
          • 18 Heating Elements
          • 19 Electrical Insulation
          • 20 Thermal Insulation
            • 20.1 General
            • 20.2 Polymeric foam
          • 21 Overcurrent Protective Devices
          • 22 Lampholders
          • 23 Switches and Control Devices
          • 24 Temperature-Limiting Controls
          • 25 Temperature-Regulating Controls
          • 26 Terminals and Sensing Elements of Temperature-Regulating and Temperature-Limiting Controls
          • 27 Materials in Contact with Water
            • 27.1 General
            • 27.2 Dip tubes
          • 28 Spacings
          • 29 Grounding
          • 30 Motors
            • 30.1 General
            • 30.2 Motor overload protection
          • 31 Low-voltage transformers – General
        • REDUCTION OF RISK OF INJURY TO PERSONS
          • 32 Reduction of Risk of Injury to Service Personnel
          • 33 Enclosures and Guards
          • 34 Switches and Controls
          • 35 Surface Temperature
          • 36 Pressure Vessels and Parts Subject to Pressure
          • 37 Temperature and Pressure Relief Devices
        • PERFORMANCE
          • 38 General
          • 39 Test Installation for Alcove or Closet
          • 40 Leakage Current Test
          • 41 Grounding Continuity Test
          • 42 Input Test
          • 43 Temperature-Regulating and Temperature-Limiting Control Operation Tests
            • 43.1 Temperature-regulating controls
            • 43.2 Temperature-limiting controls
          • 44 Nonmetallic Dip Tube Tests
            • 44.1 Deformation and weight loss
            • 44.2 Resistance to crushing
            • 44.3 Collapse
          • 45 Temperature Tests
            • 45.1 General
            • 45.2 Continuous operation
            • 45.3 Surface temperature
          • 46 Hydrostatic Pressure Test
          • 47 Enclosure Strength Test
          • 48 Strain Relief Test
          • 49 Push Back Relief Test
          • 50 Knockout Test
          • 51 Dielectric Voltage-Withstand Test
          • 52 Heating Element Insulation Resistance Test
          • 53 Electrical Disturbance Evaluation of Foam Thermal Insulation
        • MANUFACTURING AND PRODUCTION TESTS
          • 54 Dielectric Voltage-Withstand Test
          • 55 Grounding Continuity Test
        • RATINGS
          • 56 Details
        • MARKINGS
          • 57 General
          • 58 Cautionary Markings
        • INSTRUCTIONS
          • 59 Details
        • OUTDOOR-USE EQUIPMENT
          • 60 General
          • 61 Enclosures
          • 62 Field Wiring Connections
          • 63 Wiring
          • 64 Outdoor-Use Equipment Tests
            • 64.1 Rain test
            • 64.2 Accelerated aging tests - Gaskets