ANSI ASTM D1351-2014 Standard Specification for Thermoplastic Polyethylene Insulation for Electrical Wire and Cable.pdf

1、Designation: D1351 14Standard Specification forThermoplastic Polyethylene Insulation for Electrical Wireand Cable1This standard is issued under the fixed designation D1351; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year o

2、f last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers a thermoplastic insulationwhich consists substantially of polyethylene.1.2 This type of i

3、nsulation is considered suitable for use onwire or cable that will be used for continuous operation atconductor temperatures up to 75C with a maximum conductorsize of 1000 kcmil (507 mm2). The maximum voltage ratingshall not exceed 35 000 V for power application or 9 000 V forseries lighting.1.3 In

4、many instances the insulation material cannot betested unless it has been formed around a conductor. Therefore,tests done on insulated wire or cable in this specification aresolely to determine the relevant property of the insulationmaterial and not to test the insulated conductor or completedcable.

5、1.4 Whenever two sets of values are presented, in differentunits, the values in the first set are the standard, while those inparentheses are for information only.2. Referenced Documents2.1 ASTM Standards:2D1248 Specification for Polyethylene Plastics ExtrusionMaterials for Wire and CableD1711 Termi

6、nology Relating to Electrical InsulationD2308 Specification for Thermoplastic Polyethylene Jacketfor Electrical Wire and CableD2633 Test Methods for Thermoplastic Insulations andJackets for Wire and CableD3349 Test Method for Absorption Coefficient of EthylenePolymer Material Pigmented with Carbon B

7、lack2.2 ICEA Standard:T-24-380 Guide for Partial-Discharge Procedure33. Terminology3.1 Definitions:3.1.1 Refer to Terminology D1711 for definitions of termsused in this specification.3.2 Definitions of Terms Specific to This Standard:3.2.1 aging (act of), nexposure of materials to air at atemperatur

8、e of 100C for 48 h.4. Conductor Shields4.1 Conductor shields shall be used on solid and strandedconductors of power cables having rated circuit voltages above2000 V. This requirement does not apply to series lightingcables. Conductor shielding is conducting material at least0.0025 in. (0.06 mm) thic

9、k applied over the surface of theconductor. The options include conducting nonmetallic tape,conducting compound, or conducting cement.5. Physical Properties5.1 The polyethylene, before application to the conductor,shall comply with the requirements of Specification D1248 forType I; Class A, B or C;

10、Category 4 or 5; Grade E4 or E5. Therequirements of Specification D1248 do not apply to insulationremoved from the conductor.5.2 Insulation exposed to sunlight or weather requiresSpecification D1248, Class C compound or suitable protectivecoverings. Class C compound shall meet the minimum absorp-tio

11、n coefficient requirement in Table 1.5.3 Specimens removed from the wire or cable and tested at20 to 30C (68 to 86F) shall conform to the requirements forphysical properties specified in Table 1. Alternatively, theinsulation shall be air-oven aged without removal from theconductor.5.4 Thickness of I

12、nsulationThe minimum average insula-tion thickness shall be as specified in Table 2 or Table 3 of this1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility ofSubcommittee D09.07 on Electrical Insulating M

13、aterials.Current edition approved March 1, 2014. Published April 2014. Originallyapproved in 1954. Last previous edition approved in 2008 as D1351 08. DOI:10.1520/D1351-14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For An

14、nual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from The Insulated Cable Engineers Association, Inc. (ICEA), P.O.Box 1568, Carrollton, GA 30112, http:/.*A Summary of Changes section appears at the end of this standardCopyright

15、 ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International

16、Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1specification. The minimum thickness shall be at least 90 % ofthe specified minimum average thickness.5.5 Absorption CoeffcientTest according to Test MethodD3349. Alternatively,

17、a certification by the manufacturer of thepolyethylene compound that the requirement has been com-plied with shall suffice.6. Electrical Requirements6.1 Order of TestingPerform the partial discharge, acvoltage, insulation resistance, and dc voltage tests in that orderwhen any of these tests are spec

18、ified. The sequence of othertesting is not specified.6.2 Partial DischargeWhen tested in accordance withICEA T-24-380, as modified in Test Methods D2633, eachlength of completed shielded power cable rated for service at2001 V and above shall comply with the minimum partialdischarge extinction level.

19、 See Test Methods D2633.6.3 AC Voltage TestThe insulated conductor shall with-stand the ac voltage specified in Table 2 or Table 3 for 5 min.Unless otherwise specified, this test shall be omitted fornonshielded conductors rated up to 5000 V if the dc voltagetest described in 6.6 is performed.6.4 Ins

20、ulation ResistanceThe insulated conductor shallhave an insulation-resistance value equal to or greater than thatcorresponding to a constant of 50 000 M-1000 ft at 60F(15.6C). When the temperature of the water in which theinsulation is tested differs from 60F, a correction factor mustbe applied. Tabl

21、e 1 of Test Methods D2633 contains thecorrection factors. Each insulation or cable manufacturer canfurnish the 1F coefficient for their insulation material by usingthe procedure given in Test Methods D2633. Multiply themeasured value by the correction factor to obtain the insulationresistance value

22、corrected to 60F.6.5 DC Voltage Test (Cables Rated at 5001 V and Above)Upon completion of the insulation resistance test, each lengthof insulated power cable rated for service at 5001 V and overshall withstand for 15 min the dc test voltage given in Table 2or Table 3.6.6 DC Voltage Test (Cables Rate

23、d at 5000 V or Less)Upon completion of the insulation resistance test, each non-shielded conductor rated up to 5000 V shall withstand for 5min the dc test voltage given in Table 2 or Table 3. Unlessotherwise specified, it is acceptable to omit this test fornonshielded conductors rated up to 5000 V i

24、f the ac voltage testdescribed in 6.3 has been performed.7. Keywords7.1 cable; conductor; electrical; insulation; polyethylene;thermoplastic; wireTABLE 1 Physical Properties of CompoundUnaged Requirements:Tensile strength, min, psi (MPa) 1500 (10.4)Elongation at rupture, min, % 350Aged Requirements:

25、After air oven aging at 100 1C for 48 h:Tensile strength, % retention, min 75Elongation at rupture, % retention, min 75Absorption Coefficient, min, absorbance/nm 320D1351 142TABLE 2 Conductor Sizes, Insulation Thicknesses, and Test Voltages for Polyethylene-Insulated Power CablesANOTE 1Column A thic

26、knesses (0 to 2000 V) are applicable to single-conductor power cables for general application when a black pigmentedinsulation is used without a further covering.NOTE 2Column B thicknesses (0 to 2000 V) are applicable to multiple-conductor cables with an outer covering and to single-conductor cables

27、 withan outer covering.NOTE 3To limit the maximum voltage stress on the insulation at the conductor to a safe value, the minimum size of the conductor shall be inaccordance with Table 2.For cables or conditions of service where mechanical stresses govern, such as in submarine cables or long vertical

28、 risers, it is possible that theseminimum conductor sizes will not be strong enough.NOTE 4Polyethylene insulation used on nonshielded cable without an outer covering shall be black pigmented insulation meeting the requirementsfor both polyethylene insulation and polyethylene jacket.NOTE 5Polyethylen

29、e insulation used on nonshielded cable without an outer covering for rated circuit voltages of 2001 to 5000 V shall be ozone anddischarge resistant when tested in accordance with Specification D2308.NOTE 6Carbon-black-pigmented polyethylene insulation shall not be used on power cable rated over 5000

30、 V.Rated CircuitVoltage, Phase toPhase, VBConductor Size, Awgor kcmil (mm2)Insulation Thickness for 100 and 133Percent Insulation Levels,CGroundedand Ungrounded Neutrala-c Test Voltage,kV, for 100 and133 Percent InsulationLevels,CGrounded andUngrounded Neutrald-c Test Voltage, kV,for 100 and 133 Per

31、-cent Insulation Levels,CGrounded and Un-grounded NeutralColumn A Column BABABmils mm mils mm0 to 600 14 to 9 (2.08 to 6.63) 45 1.14 30 0.76 4.0 3.5 12.0 10.58 to 2 (8.37 to 33.62) 60 1.52 45 1.14 5.5 5.5 16.5 16.51 to 4/0 (42.41 to 107.2) 80 2.03 55 1.40 7.0 7.0 21.0 21.0225 to 500 (114 to 253) 95

32、2.41 65 1.65 8.0 8.0 24.0 24.0525 to 1000 (266 to 507) 110 2.79 80 2.03 10.0 10.0 30.0 30.0601 to 2000 14 to 9 (2.08 to 6.63) 60 1.52 45 1.14 5.5 5.5 16.5 16.58 to 2 (8.37 to 33.62) 70 1.78 55 1.40 7.0 7.0 21.0 21.01 to 4/0 (42.41 to 107.2) 90 2.29 65 1.65 8.0 8.0 24.0 24.0225 to 500 (140 to 253) 10

33、5 2.67 75 1.90 9.5 9.5 28.5 28.5525 to 1000 (266 to 507) 120 3.05 90 2.29 11.5 11.5 34.5 34.5100 Percent Insula-tion Level,DGroundedNeutral133 Percent Insula-tion Level,UngroundedNeutral100 PercentInsulationLevel,DGroundedNeutral133 PercentInsulationLevel, Un-groundedNeutral100 PercentInsulationLeve

34、l,GroundedNeutral133 PercentInsulationLevel, Un-groundedNeutralNONSHIELDEDE2001 to 5000 8 to 4/0 (8.37 to 107.2)225 to 500 (114 to 253)525 to 1000 (266 to 507)1101201302.793.053.301101201302.793.053.30131313131313353535353535Rated CircuitVoltage, Phase toPhase, VBConductor Size, Awgor kcmil (mm2)100

35、 PercentInsulation Level,DGrounded Neutral133 PercentInsulation Level,UngroundedNeutral100 PercentInsulationLevel,DGroundedNeutral133 PercentInsulationLevel, Un-groundedNeutral100 PercentInsulationLevel,GroundedNeutral133 PercentInsulationLevel, Un-GroundedNeutralSHIELDED2001 to 5000 8 to 1000 (8.37

36、 to 507) 90 2.29 90 2.29 13 13 35 355001 to 8000 6 to 1000 (13.30 to 507) 115 2.92 140 3.56 18 22 45 458001 to 15000 2 to 1000 (33.62 to 507)F175 4.45 215 5.46 27 33 70 8015001 to 25000 1 to 1000 (42.41 to 507) 260 6.60 345 8.76 38 49 100 12525001 to 28000 1 to 1000 (42.41 to 507) 280 7.11 42 105280

37、01 to 35000 1/0 to 1000 (53.49 to 507) 345 8.76 49 125AFor series lighting cables, see Table 3.BThe actual operating voltage shall not exceed the rated circuit voltage by more than (1) 5 percent during continuous operation or (2) 10 percent during emergencies lastingnot more than 15 min.CThe selecti

38、on of the cable insulation level to be used in a particular installation shall be made on the basis of the applicable phase to phase voltage and the general systemcategory as outlined below:100 Percent LevelIt is appropriate for cables in this category to be applied where the system is provided with

39、 relay protection such that ground faults will be clearedas rapidly as possible, but in any case within 1 min. While these cables are applicable to the great majority of cable installations which are on grounded systems, theyare also potentially suitable on other systems for which the application of

40、 cables is acceptable provided the above clearing requirements are met in completelyde-energizing the faulted section. In common with other electrical equipment, the use of cables is not recommended on systems where the ratio of the zero to positivephase reactance of the system at the point of cable

41、 application lies between 1 and 40 since excessively high voltages will be encountered in the case of ground faults.133 Percent LevelThis insulation level corresponds to that formerly designated for ungrounded systems. It is appropriate for cables in this category to be applied insituations where th

42、e clearing time requirements of the 100 percent level category cannot be met, and yet there is adequate assurance that the faulted section will bede-energized in a time not exceeding 1 h. They are also suitable for use when additional insulation strength over the 100 percent level category is desira

43、ble.DWhere additional insulation thickness is desired, it shall be the same as for the 133 percent insulation level.EWhere cable is provided with a protective covering, these insulation thicknesses shall be 90 mils (2.29 mm) for all conductor sizes listed.FFor 133 percent insulation level (ungrounde

44、d neutral), the minimum conductor size is 1 Awg (42.41 mm2).D1351 143SUMMARY OF CHANGESCommittee D09 has identified the location of selected changes to this specification since the last issue,D1351 08, that may impact the use of this specification. (Approved March 1, 2014)(1) Revised Table 1. (2) Re

45、vised temperature in Section 5.3.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof

46、 infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this s

47、tandard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake you

48、r views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by con

49、tacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 3 Conductor Sizes, Insulation Thicknesses and Test Voltages for Polyethylene-Insulated Series Lighting CablesCircuit Voltage, VA,BConductor Size, Awg (mm2)Insulation ThicknessBtest Voltage, kV