UL 1248
Standard for Engine-Generator Assemblies for Use in Recreational Vehicles

DETAILS
Edition Number:3SCC Approved:--
Edition Date:2006-12-08DOD Approved: --
Price Code:AANSI Approved: --
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover the fire and casualty aspects associated with the mechanical performance and the electrical features of engine driven generator assemblies intended for installation in recreational vehicles.

    1.2 These requirements cover generators rated: 15 kilowatts or less, 115 volts, 2-wire single phase; 240 volts, 2-wire single phase; 115/230 volts, 3-wire single phase; 3 or 4 wire, any voltage, three phase. The generators may incorporate alternator or direct current generator sections for supplying energy to battery charging circuits. Only generators having systems voltages of less than 150 volts to ground are permitted for noncommercial applications.

    1.3 These requirements cover both open and totally-enclosed generators.

    1.4 A totally-enclosed generator is so enclosed as to prevent the free exchange of air between the inside and the outside of the enclosure for windings but not sufficiently enclosed as to be airtight.

    1.5 A generator having ventilating openings that permit the passage of external cooling air over and around the windings is an open generator.

    1.6 These requirements cover generator parts and combinations of such parts.

    1.7 These requirements do not cover generators for use in hazardous locations as defined in the National Electrical Code.

    1.8 These requirements cover only the identified hazard aspects of motor-generator assemblies intended for use with recreational vehicles. These requirements do not cover other possible hazard aspects of such equipment.

    1.9 A product that contains features, characteristics, components, materials, or systems new or different from those in use when the standard was developed and that involves a risk of fire, electric shock, or injury to persons shall be evaluated using the appropriate additional component and end-product requirements as determined necessary to maintain the level of safety for the user of the product as originally anticipated by the intent of this standard.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • ALL UNITS
          • 1 Scope
          • 2 General
            • 2.1 Units of measurement
            • 2.2 Undated references
            • 2.3 Terminology
          • 3 Components
          • 4 Instructions and Drawings
        • CONSTRUCTION
          • ALL UNITS
          • 5 Protection Against Personal Injury
            • 5.1 General
            • 5.2 Enclosures and guards
            • 5.3 Sharp edges
            • 5.4 Provision for mounting
            • 5.5 Temperature
        • MECHANICAL SYSTEM
          • 6 Fuel Systems – Gasoline
            • 6.1 Tanks and pumps
            • 6.2 Fuel lines and fittings
            • 6.3 Nonmetallic parts
            • 6.4 Corrosion resistance
            • 6.5 Carburetors
          • 7 Fuel Systems – Liquefied Petroleum Gas
            • 7.1 General
            • 7.2 Containers
            • 7.3 Gauges
            • 7.4 Fuel lines and fittings
            • 7.5 Vaporizers
            • 7.6 Safety control and relief devices
            • 7.7 Nonmetallic parts
            • 7.8 Corrosion resistance
          • 8 Exhaust System
        • ELECTRICAL SYSTEM
          • 9 Enclosure
            • 9.1 General
            • 9.2 Battery compartment
          • 10 Assembly
          • 11 Wiring
            • 11.1 Field connection
            • 11.2 Wiring terminals and leads
            • 11.3 Factory wiring
            • 11.4 Internal high-voltage wiring
            • 11.5 Separation of circuits
          • 12 Electrical Components
            • 12.1 Live parts
            • 12.2 Electrical insulation
            • 12.3 Insulation systems
            • 12.4 Windings
            • 12.5 Nonmetallic functional parts
            • 12.6 Capacitors
            • 12.7 Transformers and reactors
            • 12.8 Resistors
            • 12.9 Switches and controllers
            • 12.10 Receptacles
          • 13 Bonding for Grounding
            • 13.1 Internal parts
            • 13.2 Generator frame
          • 14 Generator Protection
          • 15 Generator Output Circuit Protection
            • 15.1 Ground fault circuit interrupter
          • 16 Spacings
            • 16.1 General
            • 16.2 Barriers and liners
        • PERFORMANCE
          • ALL UNITS
          • 17 General
          • 18 Test Installation
          • 19 Instrumentation
          • 20 Temperature Test
          • MECHANICAL SYSTEMS
          • 21 Blocked Inlet Test
          • 22 Backfire-Deflector Test
          • 23 10-Day Moist Ammonia-Air Stress Cracking Test
          • 24 Overspeed Test
          • 25 LP-Gas Container Load Tests
          • ELECTRICAL SYSTEMS
          • 26 Output Waveform Analysis
          • 27 Variation in Output Voltage and Frequency Test
          • 28 Dielectric Voltage Withstand Test
          • 29 Overtemperature Protection
            • 29.1 Maximum temperature test
            • 29.2 Overload and endurance operation tests
            • 29.3 Limited short circuit test
          • 30 Overload Test
          • 31 Rain Test
        • MANUFACTURING AND PRODUCTION TESTS
          • 32 General
          • 33 Dielectric Voltage Withstand Test
          • 34 Generator Output Measurements
        • MARKING
          • 35 General
          • 36 Installation and Operating Instructions
            • 36.1 Mechanical
            • 36.2 Electrical