UL 1261
Standard for Electric Water Heaters for Pools and Tubs

DETAILS
Edition Number:6SCC Approved:--
Edition Date:2016-09-02DOD Approved: --
Price Code:BANSI Approved: 2017-09-01
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover permanently installed electric water heaters, rated 600 volts or less, for heating the water supplied through plumbing to separately heated public or private pools or tubs, in which swimming, wading, bathing, or partial or total immersion of persons, may be involved. Equipment covered may or may not be intended for use with external water circulating equipment, and is intended for installation in accordance with the National Electrical Code, NFPA 70.

    1.2 These requirements do not cover household storage tank water heaters or other equipment covered by individual requirements.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Glossary
          • 3 Safety Critical Functions
        • CONSTRUCTION
          • 4 Component Specifications
            • 4.1 General
            • 4.2 Quick-connect wire connectors
            • 4.3 Terminal blocks
            • 4.4 Wire connectors
            • 4.5 Boxes and raceways
            • 4.6 Overcurrent protection
            • 4.7 Switches
            • 4.8 Relays and contactors
            • 4.9 Transformers
            • 4.10 Printed wiring boards
            • 4.11 Temperature sensing thermistor devices
            • 4.12 Button or coin cell batteries of lithium technologies
          • 5 Frame and Enclosure
            • 5.1 General
            • 5.2 Protection of combustible materials outside the enclosure
            • 5.3 Ventilating openings
            • 5.4 Thickness of enclosure materials
            • 5.5 Openings
            • 5.6 Accessibility of uninsulated live parts
            • 5.7 Button or coin cell batteries of lithium technologies
          • 6 Metal in Contact With Water
          • 7 Field-Wiring Connections
            • 7.1 General
            • 7.2 Leads and terminals
          • 8 Field Wiring Compartments
          • 9 Leakage Current Collectors
          • 10 Equipment Grounding
          • 11 Bonding For Grounding
          • 12 Live or Current-Carrying Parts
            • 12.1 General
            • 12.2 Current-carrying parts
          • 13 Enclosure of Live Parts and Wiring
          • 14 Internal Wiring
            • 14.1 General
            • 14.2 Wiring methods
            • 14.3 Splices and connections
          • 15 Heating Elements
          • 16 Electrical Insulation
          • 17 Thermal Insulation
          • 18 Overcurrent Protection
            • 18.1 General
            • 18.2 Receptacle, transformer, lampholder protection
          • 19 Temperature Regulating Controls
            • 19.1 General
            • 19.2 Construction
          • 20 Temperature-Limiting Controls
          • 21 Electrical Spacings
          • 22 Clearance and Creepage Distances
          • 23 Protection Against Risk of Physical Injury
            • 23.1 General
            • 23.2 Maximum surface temperatures
            • 23.3 Stability
          • 24 Pressure Vessels and Parts Subject to Pressure
          • 25 Units Intended for Outdoor Use
            • 25.1 General
            • 25.2 Enclosure
            • 25.3 Corrosion resistance
        • PERFORMANCE
          • 26 Power Input
          • 27 Normal Temperature
          • 28 Water Temperature
          • 29 Dielectric Voltage-Withstand
          • 30 Abnormal Operation
          • 31 Insulation Resistance as a Result of Moisture
          • 32 Resistance to Rain
          • 33 Hydrostatic Pressure
          • 34 Metal Coating Thickness
          • 35 Endurance of Temperature-Regulating and -Limiting Controls
          • 36 Leakage Current in Water
          • 37 Stability Test
        • MANUFACTURING AND PRODUCTION-LINE TEST
          • 38 Production-Line Dielectric Voltage-Withstand
            • 38.1 General
            • 38.2 Test equipment
        • RATINGS
          • 39 Details
        • MARKINGS
          • 40 Details
            • 40.1 Identification and electrical ratings
            • 40.2 Temperatures for field-wiring conductors
            • 40.3 Marking of field terminals
          • 41 Permanence
            • 41.1 General
            • 41.2 Oven aging
            • 41.3 Immersion
            • 41.4 Standard atmosphere
            • 41.5 Evaluation of adhesive labels
        • INSTRUCTIONS
          • 42 Installation
          • 43 Use Instructions
    • CONTROLS EVALUATED TO UL 508 AND UL 873