1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDecember 27, 20061SUBJECT 2055OUTLINE OF INVESTIGATIONFORPOWER CABLE ASSEMBLIESIssue Number: 2December 27, 2006Summary of TopicsThis new issue of SU 2055 is being issued through ULs electronicpub
2、lishing system to ensure format uniformity between the PDF andHTML versions of the document. No substantive changes have beenincorporated in the document.The UL Foreword is no longer located within the UL Standard. For informationconcerning the use and application of the requirements contained in th
3、isStandard, the current version of the UL Foreword is located onULStandardsInfoNet at: http:/ 2006 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 27, 2006SUBJECT 20552No Text on This PageUL COPYRIGHTED M
4、ATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 Components 53 Undated References 5CONSTRUCTION4 Cables .55 Connectors .66 Polarization 67 Strain Relief 68 Support Device .6MARKINGS9 Label at Each Cable End 610 Terminal Identifi
5、cation 711 Identification of Mating Connectors .7DECEMBER 27, 2006 SUBJECT 2055 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover pendant and non-pendant power cable assemblies (pendant power cabl
6、eassemblies and power cable assemblies) for interconnecting or powering units of a communications orsimilar system where the assemblies are outside the unit enclosures and installed in areas accessible onlyto qualified persons. These products consist of factory-made multiple-conductor assemblies of
7、connectorsto power cables in which all of the conductors are insulated. They are for connection on the load side ofListed overcurrent devices of a-c or d-c circuits as specified in Section 240-21(a) of the National ElectricalCode, NFPA 70-1999. They are not for disconnection under load and are so ma
8、rked.1.2 Power cable assemblies are rated in volts and amperes. Their current rating is the maximum load inamperes for the cable in free air at 30C (86F), with derating of the cable ampacity as specified in Section400-5 or 318-11 of the National Electrical Code, NFPA 70-1999 where appropriate becaus
9、e of the numberof current-carrying conductors.1.3 Pendant power cable assemblies consist of Listed Type W portable power cables or Listed bus-dropcables factory-terminated at each end to Listed female connectors, wire connectors, or other means formating to male connectors, power-supply bus bars, or
10、 field-wiring terminals. Mating connectors areidentified on the assembly or in accompanying instructions. For fastening to the building structure, asupport device near the upper end of each cable keeps the weight of the cable from applying tension toany wiring terminal at the supply or load connecti
11、ons. The length of cable between the support device andthe upper termination does not exceed 6 feet or 1.83 meters. Strain relief is also provided at each end.1.4 Non-pendant power cable assemblies consist of Listed Type TC power and control tray cablesfactory-terminated at one or both ends to Liste
12、d male or female connectors, wire connectors, or otherwiring devices for mating to connectors, field-wiring terminals, other terminations, or power-supply busbars. Where one end is not terminated, the conductors are for individual termination in the field using wireconnectors Listed for the conducto
13、r material (copper or aluminum) and size and for the solid conductorsor the particular type of conductor stranding, number of strands, and size of strands used in the cableconductors. These assemblies are appropriate for use in cable trays as specified in Article 318 of theNational Electrical Code,
14、NFPA 70-1999. Where installed in an area in which the assembly is protectedfrom physical damage, no more than 7 feet or 2.1 meters of the cable is to be exposed between the cabletray and the equipment.1.5 A product that contains features, characteristics, components, materials, or systems new or dif
15、ferentfrom those covered by the requirements in this Outline of Investigation, and that involves a risk of fire,electric shock, or injury to persons shall be evaluated using the appropriate additional component andend-product requirements as determined necessary to maintain the acceptable level of s
16、afety as originallyanticipated by the intent of this Outline of Investigation. A product whose features, characteristics,components, materials, or systems conflict with specific requirements or provisions of this Outline ofInvestigation cannot be judged to comply with this Outline of Investigation.
17、Where considered appropriate,revision of requirements shall be proposed and adopted in conformance with the methods employed fordevelopment, revision, and implementation of this Outline of Investigation.DECEMBER 27, 2006SUBJECT 20554UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORD
18、ISTRIBUTION WITHOUT PERMISSION FROM UL2 Components2.1 Except as indicated in 2.2, a component of a product covered by this Outline of Investigation shallcomply with the requirements for that component.2.2 A component need not comply with a specific requirement that:a) Involves a feature or character
19、istic not needed in the application of the component in theproduct covered by this Outline of Investigation.b) Is superceded by a requirement in this Outline of Investigation.2.3 A component shall be used in accordance with its recognized rating established for the intendedconditions of use.2.4 Spec
20、ific components are recognized as being incomplete in construction features or restricted inperformance capabilities. Such components are intended for use only under limited conditions, such ascertain temperatures not exceeding specific limits, and shall be used only under those specific conditionsf
21、or which they have been recognized.3 Undated References3.1 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.CONSTRUCTION4 Cables4.1 Flexible cables used in a pend
22、ant assembly shall be appropriate for hard usage as specified inSection 364-8 of the National Electrical Code, NFPA 70-1999. They shall be Listed as complying with ULsrequirements for Type W portable power cables. Type W cables are of single- or multiple-conductor,stranded constructions.4.2 Bus-drop
23、 cables used in a pendant assembly shall be Listed as complying with ULs requirements forbus-drop cables. Bus-drop cables are of multiple-conductor, stranded constructions.4.3 Cables used in a non-pendant assembly shall be Type TC complying with the construction,performance, and marking requirements
24、 in the Standard for Power and Control Tray Cables with OptionalOptical-Fiber Members, UL 1277. Type TC cables are multiple-conductor, solid or stranded.DECEMBER 27, 2006 SUBJECT 2055 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL5 Connecto
25、rs5.1 Each wire connector used in an assembly shall comply with the applicable construction, performance,and marking requirements in the Standard for Wire Connectors and Soldering Lugs for Use on CopperConductors, UL 486A, or in the Standard for Wire Connectors and Soldering Lugs for Use on Aluminum
26、Conductors, UL 486B.5.2 Each male and female connector used in an assembly shall comply with the applicable construction,performance, and marking requirements in the Standard for Attachment Plugs and Receptacles, UL 498.5.3 The male and female connectors used in an assembly shall not be capable of m
27、ating with female andmale connectors of different electrical ratings.5.4 Each male and female connector and wire connector used on a stranded conductor employing otherthan Class B or C concentric stranding shall be evaluated for use with the particular stranding employed.6 Polarization6.1 Polarized
28、male and female connectors used in an assembly shall not accommodate a mating femaleor male connector in other than the intended orientation to the extent that electrical contact is madebetween live parts in the connected pair. Continuity of polarization shall be maintained between cableterminations
29、.7 Strain Relief7.1 The strain relief provided on each female connector used in a pendant assembly shall be capable ofsupporting a weight of 35 pounds or 15.9 kilograms applied to the cable for 60 seconds.8 Support Device8.1 The tension-take-up support device used on each cable in a pendant assembly
30、 shall comply with theconstruction, performance, and marking requirements in the Standard for Fittings for Conduit and OutletBoxes, UL 514B.MARKINGS9 Label at Each Cable End9.1 A label bearing the following information shall be attached to each cable immediately adjacent to eachend connection. The l
31、abels used shall be appropriate for the cable surface to which they are attached andshall comply with the requirements in the Standard for Marking and Labeling Systems, UL 969.a) Listees name or trademark.b) Model designation.c) Electrical ratings in volts and amperes. The voltage rating shall appea
32、r as _ VAC, _VDC, _ VOLTS AC,or_ VOLTS DC (capital letters are not required). The ampere ratingshall comply with 1.2.d) DO NOT DISCONNECT UNDER LOAD or an equivalent statement. Capital letters are notrequired.DECEMBER 27, 2006SUBJECT 20556UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTI
33、ON ORDISTRIBUTION WITHOUT PERMISSION FROM UL10 Terminal Identification10.1 A grounded (neutral) conductor is to be identified by insulation finished to show a white surfacecolor or by extruded, white electrical insulating tubing applied over the conductor insulation between theend of the cable jacke
34、t and either the cable entrance to the female connector or the crimp terminal of thewire connector. Each equipment-grounding conductor shall be identified by insulation finished to show agreen surface or a green surface with a yellow stripe or by extruded, green electrical insulating tubingapplied o
35、ver the conductor insulation between the cable jacket and either the cable entrance to the femaleconnector or the crimp terminal of the wire connector.11 Identification of Mating Connectors11.1 A means shall be provided on each pendant assembly, or in accompanying instructions, foridentifying the specific male inlet intended to mate with a female connector on the assembly.DECEMBER 27, 2006 SUBJECT 2055 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 27, 2006SUBJECT 20558No Text on This Page
