1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULOCTOBER 12, 20151UL 2731Outline of Investigation for Telecommunication Central Office Power,Battery, and Distribution CablesIssue Number: 3October 12, 2015Summary of TopicsThis Third Issue of the
2、 Outline of Investigation for TelecommunicationCentral Office Power, Battery, and Distribution Cables is being issued toallow additional materials for braids.ULs Outlines of Investigation are copyrighted by UL. Neither a printed norelectronic copy of an Outline of Investigation should be altered in
3、any way. All ofULs Outlines of Investigation and all copyrights, ownerships, and rights regardingthose Outlines of Investigation shall remain the sole and exclusive property of UL.COPYRIGHT 2015 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUT
4、ION WITHOUT PERMISSION FROM ULOCTOBER 12, 2015UL 27312No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 Components 43 Units of Measurement .44 Undated References 5CONSTRUCTION5 Materials and Wo
5、rkmanship 56 Conductors .57 Insulation and Individual Jacket .57.1 Cable rated 90C or less .57.2 Cable rated 105C 68 Tapes and Braids .69 Shield .610 Assembly .611 Overall Jacket .7PERFORMANCE12 General .712.1 Cable rated 90C or less .712.2 Cable rated 105 C .812.3 Multi-conductor cables .813 Manufa
6、cturing and Production Line Tests .9MARKINGS14 General .915 Tag, Reel or Carton Markings .10OCTOBER 12, 2015 UL 2731 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 This outline covers the requirements for one- or multi
7、-conductor telecommunication central officepower, battery and distribution cables for use in telecommunication central office power plants. The cablesare rated 75, 90, or 105C (167, 194, or 221F) dry, optionally 60, 75, or 90C (140, 167, or 194F) wet,and 300, 600, 1000, or 2000 V.2 Components2.1 Exc
8、ept as indicated in 2.2, a component (including gaskets and polymeric materials) of a productcovered by this outline of investigation shall comply with the requirements for that component.2.2 A component is not required to comply with a specific requirement that:a) Involves a feature or characterist
9、ic not required in the application of the component in theproduct covered by this outline of investigation, orb) Is superseded by a requirement in this outline of investigation.2.3 A component shall be used in accordance with its rating established for the intended conditions ofuse.2.4 Specific comp
10、onents are incomplete in construction 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.3 Units of Measurement3.1 In
11、 addition to being stated in the inch/pound units that are customary in the USA, each of therequirements in this outline is also stated in units that make the requirement conveniently usable incountries employing the metric system (practical SI). Equivalent although not necessarily exactlyidentical
12、results are to be expected from applying a requirement in USA or metric terms. Equipmentcalibrated in metric units is to be used when a requirement is applied in metric terms.OCTOBER 12, 2015UL 27314UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FRO
13、M UL4 Undated References4.1 Any undated reference to a code or standard appearing in the requirements of this outline ofinvestigation shall be interpreted as referring to the latest edition of that code or standard.CONSTRUCTION5 Materials and Workmanship5.1 Only materials that are acceptable for the
14、 particular use shall be employed in a cable. Cables shallbe made and finished with the degree of uniformity and grade of workmanship that are practicable in awell-equipped factory.5.2 Each material used in a cable shall be compatible with all of the other materials used in the cable.6 Conductors6.1
15、 Conductors shall be 14 AWG 2000 kcmil copper or 12 AWG 2000 kcmil aluminum or copper-cladaluminum and shall comply with the Standard for Thermoset-Insulated Wires and Cables, UL 44, or theStandard for Thermoplastic-Insulated Wires and Cables, UL 83.6.2 Alternatively, a single conductor may consist
16、of three bunch-stranded members laid parallel. Eachmember shall comply with 6.1 except for the size of each member.6.3 Metric conductors in accordance with Conductors of Insulated Cables, IEC 60228, Class 5, may beused instead of AWG-sized conductors described in the Standard for Thermoset-Insulated
17、 Wires andCables, UL 44, or in the Standard Thermoplastic-Insulated Wires and Cables, UL 83. The size of theconductors shall be between 0.825 mm2and 107 mm2. The next largest AWG size shall be used todetermine the insulation and/or jacket thickness.7 Insulation and Individual Jacket7.1 Cable rated 9
18、0C or less7.1.1 The insulation and individual jacket of cable rated 90C or less shall:a) Comply with the thickness and other requirements for Type THW, THWN, THW-2, THHW, orTHHN, as specified in the Standard Thermoplastic-Insulated Wires and Cables, UL 83;b) Comply with the thickness and other requi
19、rements for Type XHHW-2, XHHW, XHH, RHH,RHW-2, or RHW, as specified in the Standard for Thermoset-Insulated Wires and Cables, UL44; orc) Be Type FRPE that complies with Table 50.133 or 50.134 of the Reference Standard forElectrical Wires, Cables, and Flexible Cords, UL 1581, and all requirements, ot
20、her than physicalproperties, for a Type THW, THWN, THW-2, THHW, or THHN wire. The deformation test is tobe conducted at 100C (212F).OCTOBER 12, 2015 UL 2731 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL7.1.2 An insulation and/or jacket tha
21、t is of a thickness or of a material generically different from thosespecified above, or that is a material specified for one of the cables but that does not comply with theshort-term physical properties tests for insulation and/or jacket, shall be evaluated for the requestedtemperature rating as de
22、scribed in the Long-Term Aging Test in the Reference Standard for ElectricalWires, Cables, and Flexible Cords, UL 1581. Investigation of the electrical, mechanical, and physicalcharacteristics of the cable using the material shall show the material to be comparable in performance toa Type THW, THWN,
23、 THW-2, THHW, THHN, XHHW-2, XHHW, XHH, RHH, RHW-2, or RHW insulationand/or jacket. The investigation shall include tests such as crushing, impact, abrasion, deformation, heatshock, insulation resistance, and dielectric voltage-withstand.7.2 Cable rated 105C7.2.1 In addition to the requirements speci
24、fied in 7.1, the insulation and jacket shall comply with therequirements in 12.2.8 Tapes and Braids8.1 In a multiple-conductor construction, a tape shall be permitted over one or more of the conductors orover the entire assembly under and/or over any shield. The construction of the tape is not speci
25、fied. Inany construction, a nonmetallic braid shall be permitted over one or more of the conductors or over theentire assembly under and/or over any shield. The construction of the braid is not specified.9 Shield9.1 A shield shall be permitted over one or more of the conductors or over the entire as
26、sembly under thejacket. The shield shall be a braid of bare or coated copper, bare or coated copper-clad aluminum oraluminum wires, bare or coated copper, bare or coated copper-clad aluminum or aluminum wire serve, ametallized polyester tape with a drain wire, or a metal tape with or without a drain
27、 wire. A shield of a wrapserving or tape shall not be the outermost covering.9.2 If used, a drain wire shall consist of a continuous uninsulated, uncoated or metal coated, solid orstranded, copper conductor placed in contact with the shield(s). Uncoated copper drain wires shall not beused when alumi
28、num-faced tape is used as a shield.10 Assembly10.1 These cables consist of a single insulated conductor; or two insulated conductors laid parallel toeach other; or two or more insulated conductors twisted together. Multi-conductor constructions shallemploy an overall jacket. The length of lay of twi
29、sted conductors shall comply with the requirements in theStandard for Electrical Power and Control Tray Cables with Optional Optical-Fiber Members, UL 1277.OCTOBER 12, 2015UL 27316UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL11 Overall Jack
30、et11.1 An additional jacket other than one noted in 7.1.1 shall employ a thermoplastic or thermosettingcompound and is optional over a single conductor and required over an assembly of two or moreconductors. The minimum thickness of the jacket is specified in Table 11.1.Table 11.1Minimum thickness o
31、f overall jacketCalculated diameter of round assembly under jacket orcalculated length of major axis of flat assembly underjacketJacket thicknessMinimum average Minimum at any pointin mils0 - 0.350 30 240.351 - 0.450 45 360.451 - 0.550 60 480.551 - 0.900 80 640.901 - 1.25 95 761.26 - 1.50 110 881.51
32、 - 2.00 125 100PERFORMANCE12 General12.1 Cable rated 90C or less12.1.1 FRPE-insulated cables shall comply with Table 50.133 or 50.134 of the Reference Standard forElectrical Wires, Cables, and Flexible Cords, UL 1581 for the tensile and elongation and all requirements,other than physical properties,
33、 for a Type THW, THW-2, THHW, or THHN wire. The deformation test is tobe conducted at 100C (212F).12.1.2 Thermoplastic insulated cables (other than FRPE) shall comply with the required performancerequirements for Type THW, THW-2, THHW, or THHN, specified in the Standard forThermoplastic-Insulated Wi
34、res and Cables, UL 83.12.1.3 Thermoset-insulated cables shall comply with the performance requirements for Type XHHW-2,XHHW, XHH, RHH, RHW-2, or RHW, as specified in the Standard for Thermoset-Insulated Wires andCables, UL 44OCTOBER 12, 2015 UL 2731 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHE
35、R REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL12.2 Cable rated 105 C12.2.1 In addition to the requirements in 12.1, cables rated 105C shall comply with the following:a) Physical Properties Unaged and oven-aged specimens of insulation and jacket shall be inaccordance with any of the materia
36、ls described in Specific Materials in the Reference Standardfor Electrical Wires, Cables, and Flexible Cords, UL 1581. For materials with a temperaturerating other than that specified in the tables, or for those materials not described in SpecificMaterials in UL 1581, the requirements in Long-Term A
37、ging in UL 1581 shall be applied.Insulations for use without jackets or additional coverings, the outer insulation layer of acomposite insulation, and jackets shall have an initial absolute minimum tensile strength of notless than 1000 lbf/in2(6.9 MPa), and an absolute minimum elongation of 100 perc
38、ent beforeaging. Insulations for use with jackets or additional coverings, or the inner layer of compositeinsulation, shall have an initial absolute minimum tensile strength of not less than 500 lbf/in2(3.45 MPa) and an absolute minimum elongation of 100 percent before aging.b) Long-Term Insulation
39、Resistance Test In air, same as for Type THHN in accordance withthe Standard for Thermoplastic-Insulated Wires and Cables, UL 83, or RHH in accordance withthe Standard for Thermoset-Insulated Wires and Cables, UL 44, except that the oventemperature shall be 113C (235.4F).c) Constructions which emplo
40、y insulation and/or jacket materials not noted in 7.1.1 shall besubject to an additional investigation. The investigation of the electrical, mechanical, andphysical characteristics of the cable using these material(s) shall show the material(s) to becomparable in performance to Type THW, THW-2, THHW
41、, THHN, XHHW-2, XHHW, XHH,RHH, RHW-2, or RHW insulation and/or jacket. The investigation shall include tests such ascrushing, impact, abrasion, deformation, heat shock, insulation resistance, and dielectricvoltage-withstand.12.3 Multi-conductor cables12.3.1 The insulated single in a multi conductor
42、cable shall comply with the requirements in 12.1 or 12.2as applicable based on temperature rating. The overall cable shall comply with the Vertical Tray FlameTest as described in the Standard for Wire and Cable Test Methods, UL 2556.OCTOBER 12, 2015UL 27318UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR
43、FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL13 Manufacturing and Production Line Tests13.1 Each cable shall comply with the Spark Test in the Reference Standard for Electrical Wires, Cables,and Flexible Cords, UL 1581 shall be conducted. The test voltage shall be in accordance with
44、 theStandard for Thermoset-Insulated Wires and Cables, UL 44. Any faults shall be removed.MARKINGS14 General14.1 The following information shall be ink-printed, embossed, or indent printed on the outer surface ofthe cable at intervals not exceeding 40 inches (1.02 m), except for conductor size, whic
45、h shall be repeatedat intervals not exceeding 24 inches (610 mm). Additional markings may be surfaced marked as long asthey do not confuse or mislead.a) Manufacturers identificationb) Conductor size (any combination of mm2or AWG or kcmil)c) Aluminum conductors shall be marked “AL”. The additional ma
46、rking “ACM” or “AA 8000”shall be optional.d) Compact-stranded copper conductors shall be marked “Compact Copper”, “Compact Cu”, or“Cmpct Cu” after the conductor size.e) The words “Telecommunication Central Office Power Cable”, “TCOPC”, “TelecommunicationCentral Office Power Battery and Distribution
47、Cable”, or “ TCOPBDC”.f) Temperature rating.g) Voltage rating using “V”, “volts”, or “VOLTS”h) Optional “CT Use” or “For use in cable trays”i) Optional “FT4” or “FT4/IEEE1202”j) Optional “ST1” (limited smoke)k) Optional “VW-1”.l) Optional “-40C” if the cable complies with the cold bend and cold impa
48、ct tests conducted inaccordance with the Standard for Thermoset-Insulated Wires and Cables, UL 44.m) Optional “Sunlight Resistant” or “Sun Res”n) The insulated conductors shall not be surface printed with any type letter designation.OCTOBER 12, 2015 UL 2731 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FO
49、R FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL15 Tag, Reel or Carton Markings15.1 A tag on which the following information is indicated plainly shall be tied to every shipping length offinished cable. However, if the cable is wound on a reel or coiled in a carton, the tag may be glued, tied,stapled, or otherwise acceptably attached to the reel or carton instead of to the cable, or the tag may beeliminated and the information printed or stenciled directly onto the reel or carton. Other information maybe added if it does not confuse
