1、Designation: D 1049 98 (Reapproved 2002)e1Standard Specification forRubber Insulating Covers1This standard is issued under the fixed designation D 1049; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A n
2、umber in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.e1NOTEA precision and bias statement was added editorially in May
3、2004.1. Scope1.1 This specification covers acceptance testing of rubberinsulating covers for use as portable protective devices forprotection of workers from accidental contact with live elec-trical conductors, apparatus, or circuits. It includes insulatorhoods, dead-end protectors, line hose connec
4、tors, cable endcovers, and miscellaneous covers. The electrical, physical, andchemical requirements of this specification shall apply also toany new or modified styles of covers that may be developed forspecific purposes.1.2 Three types of covers, differing in chemical and physicalcharacteristics, a
5、re provided, and are designated as Type I,non-resistant to ozone, and Type II and Type III, resistant toozone.1.3 Five classes of covers, differing in electrical character-istics, are provided, and are designated as Class 0, Class 1,Class 2, Class 3, and Class 4.1.4 Five styles of covers, differing
6、in design characteristics,are provided, and are designated as Style A, Style B, Style C,Style D, and Style E.NOTE 1Because of the use requirements some covers are semi-rigidand others flexible.The flexible devices should remain suitably flexible forapplication and removal through normal temperatures
7、 of 29 to 54.5C(20 to 130F).1.5 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations
8、prior to use. See 18.2.2. Referenced Documents2.1 ASTM Standards:2D 297 Test Methods for Rubber ProductsChemicalAnalysisD 412 Test Methods for Vulcanized Rubber and Thermo-plastic Rubbers and Thermoplastic ElastomersTensionD 573 Test Method for RubberDeterioration in an AirOven3. Terminology3.1 Defi
9、nitions of Terms Specific to This Standard:3.1.1 breakdownthe electrical discharge or arc occurringbetween the electrodes and through the equipment being tested.3.1.2 flashoverthe electrical discharge or arc occurringbetween electrodes and over or around, but not through, theequipment being tested.3
10、.1.3 ozonea very active form of oxygen that may beproduced by corona, arcing, or ultraviolet rays.3.1.4 ozone cutting and checkingthe cutting action pro-duced by ozone on rubber under mechanical stress into a seriesof interlacing cracks.3.1.5 rubbera generic term that includes elastomers andelastome
11、ric compounds, regardless of origin.3.1.6 user as used in 4.3.1, the entity employing theactual worker(s) using the equipment; if no separate employer,then the individual.3.1.7 voltage, maximum usethe ac voltage (rms) rating ofthe protective equipment that designates the maximum nominaldesign voltag
12、e of the energized system that may be safelyworked. The nominal design voltage is equal to the phase tophase voltage on multiphase circuits.3.1.7.1 DiscussionIf there is no multiphase exposure in asystem area and the voltage exposure is limited to phase(polarity on dc systems) to ground potential, t
13、he phase (polarityon dc systems) to ground potential shall be considered to be the1This specification is under the jurisdiction of ASTM Committee F18 onElectrical Protective Equipment for Workers and is the direct responsibility ofSubcommittee F18.25 on Insulating Cover-Up Equipment. This standard r
14、eplacesANSI Standard J6.2, which is no longer available.Current edition approved March 17, 2004. Published February 1999. Originallypublished as D 1049 49 T. Last previous edition D 1049 93 (1997).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service a
15、t serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.nominal design voltage. If electrical equipment a
16、nd devices areinsulated, or isolated, or both, such that the multiphase expo-sure on a grounded wye circuit is removed, then the nominaldesign voltage may be considered as the phase-to-groundvoltage on that circuit.3.1.8 voltage, nominal designa nominal value consistentwith the latest revision on AN
17、SI C84.1, assigned to the circuitor system for the purpose of conveniently designating itsvoltage class.4. Significance and Use4.1 This specification covers the minimum electrical,chemical, and physical properties guaranteed by the manufac-turer and the detailed procedures by which such properties a
18、reto be determined. The purchaser may at his option perform orhave performed any of these tests in order to verify theguarantee. Claims for failure to meet the specification aresubject to verification by the manufacturer.4.2 Insulating covers are used for personal protection;therefore, when authoriz
19、ing their use, a margin of safety shallbe provided between the maximum voltage at which they areused and the proof-test voltage at which they are tested. Therelationship between proof-test voltage and the maximumvoltage at which insulating covers shall be used is shown inTable 1.4.3 Work practices v
20、ary from user to user, depending uponmany factors. These may include, but are not limited to,operating system voltages, construction design, work proce-dures and techniques, weather conditions, and so forth. There-fore, except for the restrictions set forth in this specificationbecause of design lim
21、itations, the use and maintenance of thisequipment is beyond the scope of this specification.4.3.1 It is common practice and the responsibility of the userof this type of protective equipment to prepare completeinstructions and regulations to govern the correct and safe useof such equipment.5. Class
22、ification5.1 Covers included under this specification shall be desig-nated as Type I, Type II, or Type III; Class 0, Class 1, Class 2,Class 3, or Class 4; StyleA, Style B, Style C, Style D, or StyleE.5.1.1 Type I, non-resistant to ozone, made from a high-gradecis-1,4-polyisoprene rubber compound of
23、natural or syntheticorigin, properly vulcanized.5.1.2 Type II, ozone resistant, made of any elastomer orcombination of elastomeric compounds.5.1.3 Type III, ozone-resistant, made of any combination ofelastomer and thermoplastic polymer, elastic in nature.5.1.4 ClassThe class designation shall be bas
24、ed on theelectrical properties and design characteristics as shown inTable 2 or Table 3.5.1.5 StyleThe style designation shall describe the item,size, and device or apparatus covered, protected, or connected.5.1.5.1 Style A designates insulator hoods.5.1.5.2 Style B designates dead end protectors.5.
25、1.5.3 Style C designates line hose connectors.5.1.5.4 Style D designates cable end covers.5.1.5.5 Style E designates miscellaneous covers.6. Ordering Information6.1 Orders for covers under this specification should includethe following information:6.1.1 Type,6.1.2 Class, and6.1.3 Either the style an
26、d item number or the size, insidediameter, outside diameter, and length of the covers.6.2 The listing of types, classes, styles, and item numbers isnot intended to mean that all shall necessarily be available frommanufacturers; it signifies only that, if made, they shallconform to the details of thi
27、s specification.7. Manufacture and Marking7.1 Each cover shall be marked clearly and permanentlywith the name of the manufacturer or supplier,ANSI/ASTM D1049, type, and class.7.1.1 Covers may be marked by either molding the infor-mation directly into the cover or by use of a label; eithermethod is e
28、qually acceptable. The method shall be at thediscretion of the manufacturer. If a label is used, the color shallbe that specified for each voltage class: Class 0red, Class1white, Class 2yellow, Class 3green, and Class4orange.8. Chemical and Physical Requirements8.1 The cover material shall conform t
29、o the tensile strengthrequirements in Table 2 or Table 1, the accelerated aging in5.1.3 and, for Type I covers, the determination of rubberpolymer in accordance with 19.1.1.TABLE 1 Proof-Test/Use Voltage RelationshipNOTE 1The ac voltage (rms) classification of the protective equip-ment designates th
30、e maximum nominal design voltage of the energizedsystem that may be safely worked. The nominal design voltage is equal to:1. The phase to phase on multiphase circuits or2. The phase to ground voltage on single phase grounded circuits.Class ofInsulatingCoversNominal MaximumUse Voltage,APhase-Phaseac,
31、 rmsAC Proof-Test Voltage,rms VDC Proof-Test Voltage,avg, V0 1 000 5 000 20 0001 7 500 10 000 40 0002 17 000 20 000 50 0003 26 500 30 000 60 0004 36 000 40 000 70 000AExcept for Class O equipment, the maximum use voltage is based on thefollowing formula:Maximum use voltage (maximum nominal design vo
32、ltage)0.95 acproof-test voltage 2000D 1049 98 (2002)e129. Electrical Requirements9.1 Each cover, when selected in accordance with Section13 shall withstand the 60-Hz ac proof-test voltage (rms value)or the dc proof-test voltage (average value) specified in Table2 or Table 3. The proof test shall be
33、performed in accordancewith Section 18 and shall be applied continuously for 3 min.9.2 Type II and Type III covers shall show no visible effectsfrom corona or ozone when tested in accordance with 18.5.TABLE 3 CoversType II and Type III SpecificationsInsulator HoodsStyle AItemNumberAType In-sulatorIn
34、sulatorDiameter,in.InsulatorHeight, in.Hose Size,in.Length,mm(in.), minHeight,mm (in.),minTensile,MPa (psi),minClassac Proof-Test Volt-age, Vdc Proof-Test Volt-age, VSuggestedElectrodeGroup1 pin 4 4 1 375 (14.75) 159 (6.25) 4.82 (700) 2 20 000 30 000 232 pin 6 5 1 406 (16.0) 159 (6.25) 4.82 (700) 2
35、20 000 30 000 233 pin 7 6 114 112 406 (16.0 (wide) 162 (6.375) 4.82 (700) 2 and 3 30 000 40 000 234 pin 10 12 212 483 (19.0) 406 (16.0) 6.89 (1000) 4 40 000 60 000 235pin 1 612 267 (10.5 (ID) 165 (6.5) 4.82 (700) 3 30 000 40 000 236 pin 834 534 112 212 381 (15.0) 216 (8.5) 6.89 (1000) 4 40 000 60 00
36、0 237 post 6.5 834 112 212 317 (12.5) 298 (11.75) 6.89 (1000) 3 30 000 40 000 238 post 6.5 13 112 212 317 (12.5) 400 (15.75) 6.89 (1000) 4 40 000 60 000 23Dead End ProtectorsStyle BItemNumberATypeInsulatorInsulatorDiameterHose Size,in.Sleeve Length,mm in.Tensile,MPa (psi), minClassac Proof-TestVolta
37、ge, Vdc Proof-TestVoltage, VSuggestedElectrodeGroup1 disk or deadend414 any size(adapters)254 (10.0) 4.82 (700) 2 and 3 30 000 40 000 232 disk or deadend414 any size(adapters)457 (18.0) 4.82 (700) 2 and 3 30 000 40 000 233 disk or deadend6 1 457 (18.0) 4.82 (700) 2 20 000 30 000 234 disk or deadend4
38、14 112 212 940 (37.0) 4.82 (700) 4 40 000 50 000 235 disk or deadend7112 212 624 (24.5) 11.0 (1600) 4 40 000 50 000 236 disk or deadend10 112 212 624 (24.5) 11.0 (1600) 4 40 000 50 000 23TABLE 2 CoversType I SpecificationsInsulator HoodsStyle AItemNumberATypeInsulatorInsulatorDiameter,in.Hose Size,i
39、n.Length,mm (in.),minHeight, mm(in.), minTensile,MPa (psi),minClassac Proof-Test Volt-age, Vdc Proof-Test Volt-age, VSuggestedElectrodeGroupB1 pin 4 1 375 (14.75) 159 (6.25) 11.0 (1600) 2 20 000 30 000 22 pin 6 1 406 (16.0) 159 (6.25) 11.0 (1600) 2 20 000 30 000 23pin714 ,112 406 (16.0) 162 (6.375)
40、11.0 (1600) 2 and 3 30 000 40 000 2Dead End ProtectorsStyle BItemNumberATypeInsulatorInsulatorDiameter,in.Hose Size,in.Inside Diame-ter, mm (in.)SleeveLength,mm (in.)Tensile,MPa (psi), minClassac Proof-Test Volt-age, Vdc Proof-Test Volt-age, VSuggestedElectrodeGroupB1 disk or deadend414 any size(ada
41、pters)121 (4.75) 254 (10) 11.0 (1600) 2 20 000 30 000 22 2 disk or 2 deadend414 any size(adapters)121 (4.75) 457 (18) 11.0 (1600) 2 20 000 30 000 23 disk or deadend6 1 165 (6.5) 457 (18) 11.0 (1600) 2 20 000 30 000 2Line Hose ConnectorsStyle CItemNumberAHose Size,in.Length,mm (in.)Tensile,MPa (psi),
42、 minClassac Proof-TestVoltage, Vdc Proof-TestVoltage, VSuggested Elec-trode GroupB1 1 305 (12.0) 11.0 (1600) 2 20 000 30 000 22114 305 (12.0) 11.0 (1600) 2 20 000 30 000 23112 305 (12.0) 11.0 (1600) 3 30 000 40 000 2AItem numbers are provided for convenient referencing.BSuggested electrode groups fo
43、r ac tests only.D 1049 98 (2002)e13TABLE 3 ContinuedLine Hose ConnectorsStyle CItem NumberAHose Size, in. Length, mm (in.)Tensile, MPa (psi),minClassac Proof-TestVoltage, Vdc Proof-TestVoltage, VSuggested Elec-trode Group1 1 305 (12.0) 4.82 (700) 2 20 000 30 000 232114 305 (12.0) 4.82 (700) 2 20 000
44、 30 000 233112 305 (12.0) 4.82 (700) 3 30 000 40 000 234112 267 (10.5) 4.82 (700) 4 40 000 50 000 235212 267 (10.5) 4.82 (700) 4 40 000 50 000 23Cable End CoversStyle DItemNumberAInsideDiameter,mm (in.)Length,mm (in.)ConductorSizeTensile,MPa (psi), minClassac Proof-TestVoltage, Vdc Proof-TestVoltage
45、, VSuggestedElectrodeGroupCable end caps size1 13 (0.5) 152 (6.0) #12 to #6 10.3 (1500) 2 20 000 30 000 12 21 (0.81) 152 (6.0) #4 to 4/0 10.3 (1500) 2 20 000 30 000 13 19 (0.75) 178 (7.0) #10 to #4 10.3 (1500) 2 20 000 30 000 14 35 (1.375) 254 (10.0) #4/0 to 500 MCM 10.3 (1500) 2 20 000 30 000 15 57
46、 (2.25) 305 (12.0) 350 MCM to 750 MCM 10.3 (1500) 2 20 000 30 000 16 81 (3.19) 406 (16.0) 800 MCM to 1000MCM10.3 (1500) 2 20 000 30 000 1Separator size7 25 (1.0) 76 (3.0) . 10.3 (1500) 2 20 000 30 000 18 38 (1.5) 108 (4.25) . 10.3 (1500) 2 20 000 30 000 19 62 (2.44) 114 (4.5) . 10.3 (1500) 2 20 000
47、30 000 110 70 (2.75) 152 (6.0) . 10.3 (1500) 2 20 000 30 000 1Test caps size11 16 (0.63) 152 (6.0) . 10.3 (1500) 2 20 000 30 000 12312 24 (0.94) 152 (6.0) . 10.3 (1500) 2 20 000 30 000 12313 19 (0.75) 178 (7.0) . 10.3 (1500) 2 20 000 30 000 12314 35 (1.38) 254 (10.0) . 10.3 (1500) 2 20 000 30 000 12
48、315 57 (2.25) 305 (12.0) . 10.3 (1500) 2 20 000 30 000 12316 76 (3.0) 406 (16.0) . 10.3 (1500) 2 20 000 30 000 12317 127 (5.0) 762 (30.0) . 4.82 (700) 4 40 000 60 000 12318 152 (6.0) 1016 (40.0) . 4.82 (700) 4 40 000 60 000 123Miscellaneous CoversStyle EItemNum-berALength, mm(in.), minWidth, mm(in.)
49、, minHeight, mm(in.), minDiameter orDepth,mm (in.)Tensile, MPa(psi),minClassac Proof-Test Volt-age, Vdc Proof-Test Volt-age, VSuggestedElectrodeGroup1 Spade cover 203 (8.0) 57 (2.25) 114 (4.5) . 6.9 (1000) 1 and 2 20 000 30 000 232 Spade cover 254 (10.0) 72 (3.0) 153 (6.0) 432 (17.0 (flat) 6.9 (1000) 1 and 2 20 000 30 000 233 Box-type cutouts . . . 533 (21.0 (flat) 10.3 (1500) 2 20 000 30 000 1234 Box-type cutouts . . . 165 (6.5) 10.3 (1500) 2 20 000 30 000 12
