1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 1248Engine-Generator Assembliesfor Use in RecreationalVehiclesUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL N
2、OT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUnderwriters Laboratories Inc. (UL)333 Pfingsten RoadNorthbrook, IL 60062-2096UL Standard for Safety for Engine-Generator Assemblies for Use in Recreational Vehicles, UL 1248Third Edition, Dated December 8, 2006Revisions
3、: This Standard contains revisions through and including August 29, 2008Summary of TopicsThis revision to UL 1248 includes a correction to a typographical error in paragraph 23.4.Text that has been changed in any manner is marked with a vertical line in the margin. Changes inrequirements are marked
4、with a vertical line in the margin and are followed by an effective date noteindicating the date of publication or the date on which the changed requirement becomes effective.The revisions dated August 29, 2008 include a reprinted title page (page1) for this Standard.The UL Foreword is no longer loc
5、ated within the UL Standard. For information concerning the use andapplication of the requirements contained in this Standard, the current version of the UL Foreword islocated on ULStandardsInfoNet at: http:/ master for this Standard at ULs Northbrook Office is the official document insofar as it re
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11、y for any damage ever exceed the price paid forthis Standard, regardless of the form of the claim.AUGUST 29, 2008 UL 1248 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL will attempt to answer support requests concerning electronic versi
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20、except for those paragraphs, sections, tables, figures,and/or other elements of the Standard having future effective dates as indicated in the note following theaffected item. The prior text for requirements that have been revised and that have a future effective dateare located after the Standard,
21、and are preceded by a SUPERSEDED REQUIREMENTS notice.New product submittals made prior to a specified future effective date will be judged under all of therequirements in this Standard including those requirements with a specified future effective date, unlessthe applicant specifically requests that
22、 the product be judged under the current requirements. However, ifthe applicant elects this option, it should be noted that compliance with all the requirements in thisStandard will be required as a condition of continued Listing and Follow-Up Services after the effectivedate, and understanding of t
23、his should be signified in writing.Copyright 2008 Underwriters Laboratories Inc.AUGUST 29, 2008 UL 1248tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULThis Standard consists of pages dated as shown in the following checklist:Page Date1.Augu
24、st 29, 20082-45 December 8, 200646August 29, 200847-58 .December 8, 2006AUGUST 29, 2008 UL 1248 tr3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAUGUST 29, 2008 UL 1248tr4No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER
25、 REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 8, 2006(Title Page Reprinted: August 29, 2008)1UL 1248Standard for Engine-Generator Assemblies for Use in RecreationalVehiclesFirst Edition July, 1978Second Edition August, 1993Third EditionDecember 8, 2006An effective date included as
26、a note immediately following certain requirementsis one established by Underwriters Laboratories Inc.Revisions of this Standard will be made by issuing revised or additional pagesbearing their date of issue. A UL Standard is current only if it incorporates themost recently adopted revisions, all of
27、which are itemized on the transmittal noticethat accompanies the latest set of revised requirements. Comments or proposalsfor revisions on any part of the Standard may be submitted to UL at any time.Proposals should be submitted via a Proposal Request in ULs On-LineCollaborative Standards Developmen
28、t System (CSDS) at http:/.COPYRIGHT 2006, 2008 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 8, 2006UL 12482No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBU
29、TION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTIONALL UNITS1 Scope .62 General 72.1 Units of measurement .72.2 Undated references .72.3 Terminology .73 Components 74 Instructions and Drawings 8CONSTRUCTIONALL UNITS5 Protection Against Personal Injury 85.1 General .85.2 Enclosures and guards 95.3 Sh
30、arp edges 135.4 Provision for mounting .135.5 Temperature 13MECHANICAL SYSTEM6 Fuel Systems Gasoline .146.1 Tanks and pumps .146.2 Fuel lines and fittings 146.3 Nonmetallic parts 156.4 Corrosion resistance .156.5 Carburetors .167 Fuel Systems Liquefied Petroleum Gas .167.1 General 167.2 Containers 1
31、77.3 Gauges 187.4 Fuel lines and fittings 197.5 Vaporizers 207.6 Safety control and relief devices .207.7 Nonmetallic parts 217.8 Corrosion resistance .228 Exhaust System .22ELECTRICAL SYSTEM9 Enclosure .229.1 General 229.2 Battery compartment .2610 Assembly 2611 Wiring .2711.1 Field connection .27D
32、ECEMBER 8, 2006 UL 1248 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL11.2 Wiring terminals and leads 2811.3 Factory wiring 3011.4 Internal high-voltage wiring 3011.5 Separation of circuits .3212 Electrical Components .3312.1 Live parts .33
33、12.2 Electrical insulation .3312.3 Insulation systems 3412.4 Windings 3412.5 Nonmetallic functional parts .3412.6 Capacitors .3512.7 Transformers and reactors 3512.8 Resistors 3512.9 Switches and controllers 3512.10 Receptacles 3513 Bonding for Grounding 3613.1 Internal parts 3613.2 Generator frame
34、.3814 Generator Protection 3915 Generator Output Circuit Protection .3915.1 Ground fault circuit interrupter .3916 Spacings 3916.1 General .3916.2 Barriers and liners 41PERFORMANCEALL UNITS17 General 4118 Test Installation .4219 Instrumentation .4220 Temperature Test .43MECHANICAL SYSTEMS21 Blocked
35、Inlet Test .4522 Backfire-Deflector Test 4523 10-Day Moist Ammonia-Air Stress Cracking Test .4624 Overspeed Test 4725 LP-Gas Container Load Tests 47ELECTRICAL SYSTEMS26 Output Waveform Analysis .4727 Variation in Output Voltage and Frequency Test 4728 Dielectric Voltage Withstand Test .4929 Overtemp
36、erature Protection 4929.1 Maximum temperature test 4929.2 Overload and endurance operation tests 5029.3 Limited short circuit test .5030 Overload Test 5031 Rain Test 51DECEMBER 8, 2006UL 12484UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMAN
37、UFACTURING AND PRODUCTION TESTS32 General 5433 Dielectric Voltage Withstand Test .5434 Generator Output Measurements .54MARKING35 General 5536 Installation and Operating Instructions .5636.1 Mechanical 5636.2 Electrical 57DECEMBER 8, 2006 UL 1248 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER R
38、EPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTIONALL UNITS1 Scope1.1 These requirements cover the fire and casualty aspects associated with the mechanical performanceand the electrical features of engine driven generator assemblies intended for installation in recreationalvehicles.1.
39、2 These requirements cover generators rated: 15 kilowatts or less, 115 volts, 2-wire single phase; 240volts, 2-wire single phase; 115/230 volts, 3-wire single phase; 3 or 4 wire, any voltage, three phase. Thegenerators may incorporate alternator or direct current generator sections for supplying ene
40、rgy to batterycharging circuits. Only generators having systems voltages of less than 150 volts to ground are permittedfor 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
41、 of air between the insideand 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 andaround the windings is an open generator.1.6 These requirements cover generator
42、parts and combinations of such parts.1.7 These requirements do not cover generators for use in hazardous locations as defined in the NationalElectrical Code.1.8 These requirements cover only the identified hazard aspects of motor-generator assemblies intendedfor use with recreational vehicles. These
43、 requirements do not cover other possible hazard aspects of suchequipment.1.9 A product that contains features, characteristics, components, materials, or systems new or differentfrom those in use when the standard was developed and that involves a risk of fire, electric shock, or injuryto persons s
44、hall be evaluated using the appropriate additional component and end-product requirementsas determined necessary to maintain the level of safety for the user of the product as originally anticipatedby the intent of this standard.DECEMBER 8, 2006UL 12486UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURT
45、HER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2 General2.1 Units of measurement2.1.1 If a value for measurement is followed by a value in other units, in parentheses, the second valuemay be only approximate. The first stated value is the requirement.2.2 Undated references2.2.1 Any undate
46、d reference to a code or standard appearing in the requirements of this standard shallbe interpreted as referring to the latest edition of that code or standard.2.3 Terminology2.3.1 The term product as used in this Standard, refers to any equipment covered by this Standard.3 Components3.1 Except as
47、indicated in 3.2, a component of a product covered by this standard shall comply with therequirements for that component.3.2 A component need not comply with a specific requirement that:a) Involves a feature or characteristic not needed in the application of the component in theproduct covered by th
48、is standard, orb) Is superseded by a requirement in this standard.3.3 A component shall be used in accordance with its recognized rating established for the intendedconditions of use.3.4 Specific components are recognized as being incomplete in construction features or restricted inperformance capab
49、ilities. Such components are intended for use only under limited conditions, such ascertain temperatures not exceeding specified limits, and shall be used only under those specific conditionsfor which they have been recognized.3.5 If the manufacturer assigns a rating or an intended use to a component of a generator (for example,an integral auxiliary switch intended to control an external circuit) the component is to be evaluated forthat rating or use or both.DECEMBER 8, 2006 UL 1248 7UL COP
