1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 1673Electric Space Heating CablesUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REP
2、RODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL Standard for Safety for Electric Space Heating Cables, UL 1673Third Edition, Dated September 13, 2010SUMMARY OF TOPICS:These revisions to UL 1673 are being issued to incorporate the addition and revision ofrequirements to relocate component Stand
3、ard references from Appendix A into the body of theStandard as component requirements.Text that has been changed in any manner or impacted by ULs electronic publishing system is markedwith a vertical line in the margin. Changes in requirements are marked with a vertical line in the marginand are fol
4、lowed by an effective date note indicating the date of publication or the date on which thechanged requirement becomes effective.The new and revised requirements are substantially in accordance with Proposal(s) on this subject datedJuly 29, 2011.All rights reserved. No part of this publication may b
5、e reproduced, stored in a retrieval system, ortransmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwisewithout prior permission of UL.UL provides this Standard as is without warranty of any kind, either expressed or implied, including butnot limited to, the i
6、mplied warranties of merchantability or fitness for any purpose.In no event will UL be liable for any special, incidental, consequential, indirect or similar damages,including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or theinability to use this Stan
7、dard, even if UL or an authorized UL representative has been advised of thepossibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid forthis Standard, regardless of the form of the claim.Users of the electronic versions of ULs Standards for Safety agree to
8、 defend, indemnify, and hold ULharmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonableattorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronicStandard on the purchasers computer system.The requirements
9、in this Standard are now in effect, 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
10、dateare located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice.OCTOBER 14, 2011 UL 1673 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULOCTOBER 14, 2011 UL 1673tr2No Text on This PageUL COPYRIGHTED MATERIAL NOT AUT
11、HORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSEPTEMBER 13, 2010(Title Page Reprinted: October 14, 2011)1UL 1673Standard for Electric Space Heating CablesFirst Edition November, 1990Second Edition May, 1996Third EditionSeptember 13, 2010This UL Standard for Safety consist
12、s of the Third Edition including revisionsthrough October 14, 2011.Comments or proposals for revisions on any part of the Standard may besubmitted to UL at any time. Proposals should be submitted via a ProposalRequest in ULs On-Line Collaborative Standards Development System (CSDS)at http:/.ULs Stan
13、dards for Safety are copyrighted by UL. Neither a printed nor electroniccopy of a Standard should be altered in any way. All of ULs Standards and allcopyrights, ownerships, and rights regarding those Standards shall remain thesole and exclusive property of UL.COPYRIGHT 2011 UNDERWRITERS LABORATORIES
14、 INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULOCTOBER 14, 2011ELECTRIC SPACE HEATING CABLES - UL 16732No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSI
15、NTRODUCTIONS1 Scope .52 Components 63 Units of Measurement .64 Glossary .6CONSTRUCTION4A General 74B Insulated Wire, Cable and Heating Leads .94C Connectors .94D Supplemental Insulation, Insulating Bushings and Assembly Aids 104E Boxes and Raceways .105 Current-Carrying Parts 106 Nonheating Leads 10
16、A7 Heating Leads .10B8 Splices and Connections 10B9 Electrical Insulation .10B10 Electrical Spacings 10C11 Grounding 10D12 Accessories 10DPERFORMANCE13 General 10E14 Test Installation .1114.1 Cable intended for mounting in ceilings .1114.2 Cable intended for installation in concrete or poured masonr
17、y floors 1114.3 Test voltage .1115 Power Input Test .1216 Normal-Temperature Test 1216.1 General .1216.2 Temperature measurements .1316.3 Specific test conditions 1317 Dielectric Voltage-Withstand Test .1418 Insulation Resistance Test .1419 Abnormal-Operation Tests .1420 Physical Properties Tests 15
18、21 Splice Test .1521.1 General .1521.2 Thermal stress test .1721.3 Heat shock test 1722 Grounding Component Ampacity Test .17MANUFACTURING AND PRODUCTION TESTS23 Production-Line Dielectric Voltage-Withstand Test 17OCTOBER 14, 2011 ELECTRIC SPACE HEATING CABLES - UL 1673 3UL COPYRIGHTED MATERIAL NOT
19、AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULRATINGS24 Details .19MARKINGS25 Details .19INSTALLATION AND OPERATING INSTRUCTIONS26 Details .20APPENDIX AOCTOBER 14, 2011ELECTRIC SPACE HEATING CABLES - UL 16734UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTI
20、ON ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTIONS1 Scope1.1 These requirements cover electric space heating cables intended for space heating purposes, ratedfor 480 V or less, for installation in unclassified locations in accordance with Article 424 Part V of theNational Electrical Code (NEC
21、), ANSI/NFPA 70.1.1 revised October 14, 20111.2 These requirements apply to space heating cables intended for installation in ceilings of enclosedstructures or within or beneath floors of enclosed structures where the floor is constructed ofnoncombustible material, concrete, or asphalt.1.3 These req
22、uirements do not cover electric heating equipment or appliances that are covered byindividual requirements that are separate from this Standard. Other related standards include:a) Electrical Resistance Heat Tracing for Commercial and Industrial Applications, UL 515;b) Movable and Wall- or Ceiling-Hu
23、ng Electric Room Heaters, UL 1278;c) Outline of Investigation for Mobile Home Pipe Heating Cables, Subject 1462;d) Outline of Investigation for Roof and Gutter De-Icing Cable Units, Subject 1588;e) Electric Radiant Heating Panels and Heating Panel Sets, UL 1693;f) Outline of Investigation for Reside
24、ntial Pipe Heating Cables, Subject 2049;g) Fixed and Location-Dedicated Electric Room Heaters, UL 2021; andh) Electric Heating Appliances, UL 499.1.3 revised October 14, 20111.4 These requirements do not cover the following:a) Heating cable intended to be installed in a dropped or suspended ceiling;
25、b) Heating cable connected to the supply by use of a flexible cord with attachment plug;c) Heating cable equipment that is movable after installation;d) Heating equipment with integral means of producing air flow;e) Heating equipment manufactured and sold as an integral part of a floor covering mate
26、rialssuch as heated floor tiles, heated carpet, and heated laminate floor;f) Heating equipment intended for installation on dry board or plaster, when heating equipmentexceeds 2-3/4 W/ft (9 W/m) and/or with adjacent runs intended to be installed less than 1.5inches (38 mm) on center;g) Constant watt
27、age heating cable intended for installation in concrete or poured masonryfloors with heating leads rated greater than 16-1/2 W/ft (54 W/m); andOCTOBER 14, 2011 ELECTRIC SPACE HEATING CABLES - UL 1673 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION F
28、ROM ULh) Heating panels and panel sets of Article Part IX of the National Electrical Code (NEC), ANSI/NFPA 70; andi) Heating cables for installation directly below floor coverings in accordance with 424.99 of theNational Electrical Code (NEC), ANSI/NFPA 70.1.4 revised October 14, 20111.5 These requi
29、rements do not cover switches, transformers, power supplies, controls (e.g. temperature)or protective devices (e.g. ground fault protection) that are typically installed separate from the spaceheating cable but may be installed at the same time as part of the space heating system. Those devicesare c
30、overed by individual requirements that are separate from this Standard.1.5 revised October 14, 20112 ComponentsSection 2 deleted October 14, 20113 Units of Measurement3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.4 Glossary
31、4.1 For the purpose of this standard, the definitions in this Section apply.4.1.1 COMPONENT A device or fabricated part of the appliance covered by the scope of a safetystandard dedicated to the purpose. When incorporated in an appliance, equipment otherwise typicallyfield installed (e.g. outlet box
32、) is considered to be a component. Unless otherwise specified, materialsthat compose a device or fabricated part, such as thermoplastic or copper, are not consideredcomponents.4.1.1 added October 14, 20114.2 ELECTRICAL CIRCUITSa) High Voltage Circuit A circuit involving a potential of not more than
33、480 V, and havingcircuit characteristics in excess of those of a low voltage circuit.b) Low Voltage Circuit A circuit involving a potential of not more than 30 V rms (42.4 V peakor direct-current) and supplied by a primary battery or by a Class 2 transformer, or by acombination of an isolating trans
34、former and fixed impedance that, as a unit, complies with all ofthe performance requirements for a Class 2 transformer specified in the Standard for LowVoltage Transformers - Part 1: General Requirements, UL 5085-1 and the Standard for LowVoltage Transformers Part 3: Class 2 and Class 3 Transformers
35、, UL 5085-3. A circuit derivedfrom a source of supply classified as a line voltage circuit, using impedance in series with thesupply circuit as a means of limiting the voltage and current, is not to be considered a lowvoltage circuit.4.2 revised October 14, 20114.3 FIELD CONNECTION Terminals or lead
36、s provided for connection of the space heating cable byan electrical installer to the branch circuit supply source.OCTOBER 14, 2011ELECTRIC SPACE HEATING CABLES - UL 16736UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL4.4 HEATING LEAD That po
37、rtion of the electric space heating cable that, by means of electricalresistance, is provided for the intent of heating.4.5 ELECTRIC SPACE HEATING CABLE An assembly consisting of a heating lead and anonheating lead or leads intended for installation in the field.4.6 FREE NONHEATING LEADS That portio
38、n of the factory installed nonheating leads of an electricspace heating cable intended for installation in ceilings or within floors that are located behindconcealed areas without a supplemental raceway and not embedded within noncombustible materialssuch as concrete and that are intended to be spli
39、ced to electrical power supply leads at a junction box.4.6 revised October 14, 20114.7 NONHEATING LEAD Factory installed wiring that is employed to connect the heating length ofthe space heating cable to the branch circuit supply source, and that is not intended to consumeelectrical energy for the p
40、urpose of heating.4.7 revised October 14, 20114.7.1 SENSOR WIRE Factory provided wiring intended for installation in ceilings or floors inproximity to heating lead(s) and for connection to a control and/or protective device installed as part ofthe space heating system.4.7.1 added October 14, 20114.8
41、 WATTS PER FOOT The total power in watts of the heating lead length divided by its total linearlength in feet.CONSTRUCTION4A General4A.1 A component of a product covered by this standard shall:a) Comply with the requirements for that component as indicated in 4B 4E;b) Be used in accordance with its
42、rating(s) established for the intended conditions of use;c) Be used within its established use limitations or conditions of acceptability;d) Additionally comply with the applicable requirements of this end product standard; ande) Not contain mercury.Specific components are incomplete in construction
43、 features or restricted in performance capabilities.Such components are intended for use only under limited conditions, such as certain temperatures notexceeding specified limits, and shall be used only under those specific conditions.Exception No. 1: A component of a product covered by this standar
44、d is not required to comply with aspecific component requirement that:a) Involves a feature or characteristic not required in the application of the component in theproduct,b) Is superseded by a requirement in this standard, orOCTOBER 14, 2011 ELECTRIC SPACE HEATING CABLES - UL 1673 7UL COPYRIGHTED
45、MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULc) Is separately investigated when forming part of another component, provided the componentis used within its established ratings and limitations.Exception No. 2: A component complying with a component standar
46、d other than those cited in 4B 4Eis acceptable if:a) The component also complies with the applicable component standard of 4B 4E; orb) The component standard:1) Is compatible with the ampacity and overcurrent protection requirements in theNational Electrical Code (NEC), ANSI/NFPA 70, where appropria
47、te;2) Considers long-term thermal properties of polymeric insulating materials inaccordance with the Standard for Polymeric Materials Long Term PropertyEvaluations, UL 746B, and;3) Any use limitations of the other component standard is identified and appropriatelyaccommodated in the end use applicat
48、ion. For example, a component used in ahousehold application, but intended for industrial use and complying with the relevantcomponent standard may assume user expertise not common in householdapplications.4A.1 added October 14, 20114A.2 A component that is also intended to perform other functions,
49、such as over current protection,ground-fault circuit-interruption, surge suppression, any other similar functions, or any combinationthereof, shall comply additionally with the requirements of the applicable standard(s) that cover devicesthat provide those functions.Exception: Where these other functions are not required for the application and not identified as part ofmarkings, instructions, or packaging for the appliance, the additional component standard(s) need not beapplied.4A.2 added October 14, 20114A.3 A compon
