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UL 1248
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UL 1248 3rd Edition, August 29, 2008 UL Standard for Safety Engine-Generator Assemblies for Use in Recreational Vehicles
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Description / Abstract:
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.
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.
These requirements cover both open and totally-enclosed generators.
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.
A generator having ventilating openings that permit the passage of external cooling air over and around the windings is an open generator.
These requirements cover generator parts and combinations of such parts.
These requirements do not cover generators for use in hazardous locations as defined in the National Electrical Code.
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.
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.
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.
These requirements cover both open and totally-enclosed generators.
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.
A generator having ventilating openings that permit the passage of external cooling air over and around the windings is an open generator.
These requirements cover generator parts and combinations of such parts.
These requirements do not cover generators for use in hazardous locations as defined in the National Electrical Code.
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.
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.