UL SUBJECT 9990-2017 UL Outline for Investigation Information and Communication Technology (ICT) Power Cables (Issue 2).pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMAY 23, 20171UL 9990Outline of Investigation for Information and Communication Technology(ICT) Power CablesIssue Number: 1May 23, 2017Summary of TopicsThis first issue of the Outline of Investiga

2、tion for Information andCommunication Technology (ICT) Power Cables, UL 9990, coversInformation and Communication Technology cable assemblies commonlyused for providing power, with or without communications, to lowpowered electronic devices.ULs Outlines of Investigation are copyrighted by UL LLC. Ne

3、ither a printed norelectronic copy of an Outline of Investigation should be altered in 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 ULLLC.COPYRIGHT 2017 UL LLCUL COPYRI

4、GHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMAY 23, 2017UL 99902No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 Reference Publications 43 U

5、nits of Measurement .54 Definitions 5CONSTRUCTION5 Cable Assemblies .56 Marked Cable Assemblies .6PERFORMANCE7 Strain-Relief Test .68 Flexing Test 69 Normal Temperature Test 710 Dielectric Voltage-Withstand Test 911 Fault Current Test .9MANUFACTURING AND PRODUCTION TESTS12 Production-Line Continuity

6、 Test .10MARKINGS13 General 10MAY 23, 2017 UL 9990 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 This Outline of Investigation covers the power handling capabilities of Information andCommunication Technology (ICT) ca

7、ble assemblies when used for powering or charging applications. Thesignal transmission performance of the cable assemblies is not within the scope of these requirements.1.2 These cable assemblies are intended to be used only in the output of a power source class 2 (PS2)and electrical energy source c

8、lass 1 (ES1), or a limited power source, as determined in accordance withthe Standard for Safety for Audio/Video, Information, and Communication Technology Equipment Part1: Safety Requirements, UL 62368-1. These circuits do not exceed 60 V DC, 8.0 amperes and 100 watts.Note: These circuits are somet

9、imes referred to as low voltage, limited-power circuits, low voltage,limited-energy circuits” or NECClass 2 circuits.1.3 ICT cable assemblies may also be required to comply with industry specifications applicable to theirparticular configuration and use. Compliance with these specifications is not w

10、ithin the scope of theserequirements.2 Reference PublicationsAny undated reference to a code or standard appearing in the requirements of this Outline shall beinterpreted as referring to the latest edition of that code or standard.ASTMASTM E230/E230MStandard Specification and Temperature-Electromoti

11、ve Force (emf) Tables for StandardizedThermocouplesEIAEIA-364-38Cable Pull-Out Test Procedure for Electrical ConnectorsEIA-364-41Cable Flexing Test Procedure for Electrical ConnectorsUL (Underwriters Laboratories Inc.)UL 13Power-Limited Circuit CablesUL 444Communications CablesUL 758Appliance Wiring

12、 MaterialUL 746CPolymeric Materials Use in Electrical Equipment EvaluationsMAY 23, 2017UL 99904UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 62368-1Audio/Video, Information, and Communication Technology Equipment Part 1: Safety Requiremen

13、ts3 Units of Measurement3.1 The unit of measure shall be SI. If a value for measurement is followed by a value in other units inparentheses, the second value represents a direct conversion or an alternative value.4 Definitions4.1 For the purpose of this Outline, the following definitions apply.4.2 M

14、ARKED CABLE ASSEMBLY A cable assembly that uses physical characteristics of theconnectors, shorted or open conductors, or active or passive circuit components within the cable toprovide information about the cables power handling characteristics to the power source, the powereddevice (load), or both

15、. The “marking” is electronically detected by the devices (power source and/orload) on either or both ends of the cable assembly.4.3 CHEATER CABLES Cable assemblies provided with inappropriate markers, connections, shorts,physical configurations, etc. that are designed to trick” the connected device

16、s into unintended modes ofoperation or disable or interfere with the intended system operation. An example of this would beshorting the data pins in a charging cable to force a power source into a high current, quick chargemode.CONSTRUCTION5 Cable Assemblies5.1 Cables shall comply with the Standard

17、for Safety for Communications Cables, UL 444, the Standardfor Safety for Power-Limited Circuit Cables, UL 13, or the Standard for Safety for Appliance WiringMaterial, UL 758, rated VW-1, jacketed and determined to be suitable for the application.5.2 Cable assemblies shall have one connector on each

18、end. Plug/connector combinations shall be of atype permitted by the relevant specification. Cable assemblies with multiple connectors on either end arenot permitted due to the danger of back-powering ports with powering voltages.5.3 A connector shall be constructed of material with a minimum flame r

19、ating of V-1 at the minimumthickness used or the finished connector/material combination shall comply with the 12 mm end-productflame test described in the Standard for Polymeric Materials Use in Electrical Equipment Evaluations,UL 746C.5.4 The measured length of a cable assembly shall be within 10

20、percent of the identified length whenmeasured from the face of one connector to the face of the connector at the far end of the cable.5.5 The rating of a marked or non-marked cable assembly shall not be less than the maximum limitestablished by the relevant specification for the cable assembly confi

21、guration.MAY 23, 2017 UL 9990 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6 Marked Cable Assemblies6.1 The cable configuration, rating(s) and markers shall be consistent with each other and in compliancewith the relevant specification(s).

22、 Only markers and configurations identified in the relevant specificationsare permitted.6.2 Cheater cables are not permitted.PERFORMANCE7 Strain-Relief Test7.1 A cable assembly shall be provided with means to keep tension on the cord from being transmittedto terminals, splices or wiring within the c

23、onnectors. The cable assembly shall comply with the test ineither (a) or (b) below. After the test, the cable assembly shall comply with the applicable requirements ofthe Dielectric Voltage-Withstand Test, Section 10.a) The Cable Pull-Out test in Cable Pull-Out Test Procedure for Electrical Connecto

24、rs, EIA 364-38, Method A. No physical damage to the cable assembly shall occur when it is subjected to a40 N (9 lbf) axial load for a minimum of 1 minute while clamping one end of the cable plug.b) The plug, connector, or jack is to be mounted with the cord hanging in a vertical position. Aforce of

25、40 N (9 lbf) is to be gradually applied to the cord. The direction of application of theforce is to be varied from directly downward to an angle of 45 degrees from the vertical in alldirections. The force is to be applied for a period of 1 minute. The movement of the cablerelative to the connector,

26、during and after the test, shall be limited to 1 mm (0.4 inch) maximum.Strain or stress shall not be transmitted to the wiring connections.7.2 When the strain-relief means utilizes a plastic part, the test shall be repeated on an as-receivedsample that has been oven aged for 7 days at 70C (158F) and

27、 then allowed to reach room temperature.8 Flexing Test8.1 A cable assembly shall be capable of withstanding a minimum of 200 cycles of flexing when testedin accordance with (a) or (b) below. At the conclusion of the test, the cable assembly shall comply withthe Dielectric Voltage-Withstand Test, Sec

28、tion 10. Breakage of the conductor or insulation of theconductor is not acceptable unless the conductor breaks at a point other than the interface of the deviceand conductor. If the connectors used for the cable assembly are different at each end, eachconnector/cable combination is to be tested.a) T

29、he Cable Flexing test in Cable Flexing Test Procedure for Electrical Connectors, EIA 364-41. No physical damage or discontinuity over 1 ms during flexing shall occur to the cableassembly with Dimension X = 3.7 times the cable diameter and 100 cycles in each of twoplanes, 120 degree arc.b) A sample o

30、f the cable assembly is to be secured to the flexing apparatus so that the cordassumes the natural bend permitted by the assembly.Each connector is to be secured in the jaws of the flexing machine so that the point of cord exitis at the center of rotation. The rotating jaws are to be adjusted to rot

31、ate to an angle of 90degrees to each side of the centered position. At the centered position, the cord is to hangvertically and a test weight of 113 g (4 oz) is to be attached to the cord approximately 305 mm(12 inches) from the point of rotation as illustrated in Figure 8.1.MAY 23, 2017UL 99906UL C

32、OPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULEach cable assembly is to be subjected to 100 complete flexing cycles in each plane. A flexingcycle consists of rotation of the jaws from the vertical (centered) position until 90 degrees toone side,

33、 back past the vertical position until 90 degrees to the other side, and back to thevertical position. The rate of testing is to be 10 cycles per minuteaCord guides are used only to control oscillation of the wire during testing and can therefore be adjusted,if necessary, so that the cord does not c

34、ontact the guides in a manner that could increase the degree ofbend present at its entry to the fitting during the test.9 Normal Temperature Test9.1 The temperature rise shall not exceed 30C (54F) above ambient temperature at any point on theconnectors under test. The temperature on the cable shall

35、not exceed the temperature rating of the cable.9.2 The test current shall be the maximum current permitted by the relevant specification for the markedcable (if provided) or connector configuration of the cable assembly, or the rating of the cable assembly,whichever is higher. The current is to be a

36、pplied to the appropriate power contacts as detailed in therelevant specification using a constant current source with the other end terminating in a short circuit ora suitable power supply and load combination. The assembly is to be operated in this manner until thermalequilibrium is attained. A te

37、mperature is considered to be stabilized when three consecutive readings,taken at 5 minute intervals, indicate no further rise above the ambient temperature.9.3 Temperatures are to be measured by means of thermocouples that are not larger than 24 AWG (0.21mm2) and not smaller than 30 AWG (0.05 mm2).

38、 When thermocouples are used in determiningtemperatures, it is common practice to employ thermocouples consisting of 30 AWG iron and constantanwires with a suitable temperature indicating instrument. This equipment is to be used whenever a refereemeasurement of temperature is necessary.9.4 The therm

39、ocouples and related instruments are to be accurate and calibrated in accordance withstandard laboratory practice. The thermocouple wire is to conform to the requirements specified in theTolerances on Initial Values of EMF versus Temperature tables in the Standard Specification andTemperature-Electr

40、omotive Force (emf) Tables for Standardized Thermocouples, ASTM E230/E230M.9.5 Temperatures on the connector and cable are to be monitored using a temperature-indicating device.The temperature measurement is to be made on the wiring terminals of each device if they are accessiblefor the mounting of

41、thermocouples. If the wiring terminals are inaccessible, temperatures are to bemeasured as close as possible to the device current carrying contacts.9.6 This test shall be conducted in a draft-free location having an ambient temperature of 25 5C (779F). Tests conducted at an ambient temperature othe

42、r than 25C are to have the test results correctedto an ambient temperature of 25C by adding or decreasing the appropriate variation between 25C andthe ambient.MAY 23, 2017 UL 9990 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFigure 8.1Flex

43、ing test apparatusMAY 23, 2017UL 99908UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL10 Dielectric Voltage-Withstand Test10.1 Immediately following the Normal Temperature Test, Section 9, the cable assembly shall withstandwithout arc-over or

44、breakdown, the application of a 500 volts DC test potential. The test potential shall beapplied between each of the contacts of the connector and between the contacts and anynon-current-carrying metal parts. Prior to the application of the test voltage, Components serving aselectronic markers that b

45、ridge insulation or spacings shall be removed.10.2 The applied potential is to be increased from zero until the required test voltage is reached, and isto be held at that voltage for a period of 1 minute. The increase in the applied potential is to be at auniform rate and as rapid as is consistent w

46、ith its value being correctly indicated by a voltmeter.10.3 The test potential is to be supplied from a 500 volt-ampere or larger capacity testing transformerwhose output is essentially sinusoidal and can be varied. The applied potential is to be increased fromzero until the required test voltage is

47、 reached, and is to be held at that voltage for a period of 1 minute.The increase in the applied potential is to be at a uniform rate and as rapid as is consistent with its valuebeing correctly indicated by a voltmeter.11 Fault Current Test11.1 A DC test current of 8 Amperes is to be applied to the

48、cable assembly. The current is to be appliedto the appropriate power contacts as detailed in the relevant specification using a constant current sourcewith the other end terminating in a short circuit or a suitable power supply and load combination.11.2 The cable assembly is to be prepared for testi

49、ng as follows: a circular loop with an inside diameterof 25 mm (1 inch) is to be formed approximately 76 mm (3 inches) from the end of the cord intended tobe connected to the source of supply. If the cord diameter is too large to form a circular loop of 25 mm,a loop with a diameter as close as practical to 25 mm shall be formed. The loop is to be fixed with anonmetallic fastener such that the sections of the cord do not cross within the loop. The cable assemblyshall be draped with a single ply of bleached cotton cheesecloth. The cheesecloth used for