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ASTM D1049-98(2022)

(Specification)

Standard Specification for Rubber Insulating Covers

Standard Specification for Rubber Insulating Covers

ABSTRACT
This specification covers acceptance testing of rubber insulating covers for use as portable protective devices for protection of workers from accidental contact with live electrical conductors, apparatus, or circuits. It includes insulator hoods, dead-end protectors, line hose connectors, cable end covers, and miscellaneous covers. The electrical, physical, and chemical requirements of this specification shall apply also to any new or modified styles of covers that may be developed for specific purposes. The covers shall be of three types: Type I – non-resistant to ozone, made from a high-grade cis-1,4-polyisoprene rubber compound of natural or synthetic origin, properly vulcanized; Type II - ozone resistant, made of any elastomer or combination of elastomeric compounds; and Type III - ozone-resistant, made of any combination of elastomer and thermoplastic polymer, elastic in nature. Electrical proof, ozone resistance, chemical, and physical tests shall be conducted on each of the covers to determine its acceptability. The cover material shall conform to the tensile strength requirements, the accelerated aging, and for Type I covers, the determination of rubber polymer. Each cover shall withstand the specified ac proof-test voltage (rms value) or the dc proof-test voltage (average value).
SCOPE
1.1 This specification covers acceptance testing of rubber insulating covers for use as portable protective devices for protection of workers from accidental contact with live electrical conductors, apparatus, or circuits. It includes insulator hoods, dead-end protectors, line hose connectors, cable end covers, and miscellaneous covers. The electrical, physical, and chemical requirements of this specification shall apply also to any new or modified styles of covers that may be developed for specific purposes.  
1.2 Three types of covers, differing in chemical and physical characteristics, are provided, and are designated as Type I, non-resistant to ozone, and Type II and Type III, resistant to ozone.  
1.3 Five classes of covers, differing in electrical characteristics, are provided, and are designated as Class 0, Class 1, Class 2, Class 3, and Class 4.  
1.4 Five styles of covers, differing in design characteristics, are provided, and are designated as Style A, Style B, Style C, Style D, and Style E.  
Note 1: Because of the use requirements some covers are semi-rigid and others flexible. The flexible devices should remain suitably flexible for application and removal through normal temperatures of − 29 °C to 54.5 °C (−20 °F to 130 °F).  
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. See 18.2 for a specific cautionary statement.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
31-May-2022
ICS
29.035.20 - Plastics and rubber insulating materials
Technical Committee
F18 - Electrical Protective Equipment for Workers
Drafting Committee
F18.25 - Insulating Cover-Up Equipment
Current Stage
Ref Project

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ASTM D1049-98(2022) - Standard Specification for Rubber Insulating CoversASTM D1049-98(2022) - Standard Specification for Rubber Insulating Covers
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ASTM D1049-98(2022) - Standard Specification for Rubber Insulating Covers
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D1049 −98 (Reapproved 2022)
Standard Specification for
1
Rubber Insulating Covers
This standard is issued under the fixed designation D1049; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 This specification covers acceptance testing of rubber
insulating covers for use as portable protective devices for
2. Referenced Documents
protection of workers from accidental contact with live elec-
2
2.1 ASTM Standards:
trical conductors, apparatus, or circuits. It includes insulator
D297Test Methods for Rubber Products—ChemicalAnaly-
hoods, dead-end protectors, line hose connectors, cable end
sis
covers, and miscellaneous covers.The electrical, physical, and
D412TestMethodsforVulcanizedRubberandThermoplas-
chemical requirements of this specification shall apply also to
tic Elastomers—Tension
anynewormodifiedstylesofcoversthatmaybedevelopedfor
D573Test Method for Rubber—Deterioration in an Air
specific purposes.
Oven
1.2 Threetypesofcovers,differinginchemicalandphysical
characteristics, are provided, and are designated as Type I,
3. Terminology
non-resistant to ozone, and Type II and Type III, resistant to
3.1 Definitions of Terms Specific to This Standard:
ozone.
3.1.1 breakdown—the electrical discharge or arc occurring
1.3 Five classes of covers, differing in electrical
betweentheelectrodesandthroughtheequipmentbeingtested.
characteristics, are provided, and are designated as Class 0,
3.1.2 flashover—the electrical discharge or arc occurring
Class 1, Class 2, Class 3, and Class 4.
between electrodes and over or around, but not through, the
1.4 Five styles of covers, differing in design characteristics,
equipment being tested.
are provided, and are designated as Style A, Style B, Style C,
3.1.3 ozone—a very active form of oxygen that may be
Style D, and Style E.
produced by corona, arcing, or ultraviolet rays.
NOTE 1—Because of the use requirements some covers are semi-rigid
3.1.4 ozone cutting and checking—the cutting action pro-
andothersflexible.Theflexibledevicesshouldremainsuitablyflexiblefor
ducedbyozoneonrubberundermechanicalstressintoaseries
application and removal through normal temperatures of−29°C to
of interlacing cracks.
54.5°C (−20°F to 130°F).
3.1.5 rubber—a generic term that includes elastomers and
1.5 This standard does not purport to address all of the
elastomeric compounds, regardless of origin.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.1.6 user—asusedin4.3.1,theentityemployingtheactual
priate safety, health, and environmental practices and deter-
worker(s) using the equipment; if no separate employer, then
mine the applicability of regulatory limitations prior to use.
the individual.
See 18.2 for a specific cautionary statement.
3.1.7 voltage, maximum use—the ac voltage (rms) rating of
1.6 This international standard was developed in accor-
theprotectiveequipmentthatdesignatesthemaximumnominal
dance with internationally recognized principles on standard-
design voltage of the energized system that may be safely
ization established in the Decision on Principles for the
worked. The nominal design voltage is equal to the phase to
Development of International Standards, Guides and Recom-
phase voltage on multiphase circuits.
3.1.7.1 Discussion—If there is no multiphase exposure in a
system area and the voltage exposure is limited to phase
1
This specification is under the jurisdiction of ASTM Committee F18 on
Electrical Protective Equipment for Workers and is the direct responsibility of
Subcommittee F18.25 on Insulating Cover-Up Equipment. This standard replaces
2
ANSI Standard J6.2, which is no longer available. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved June 1, 2022. Published July 2022. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
published in 1949 as D1049–49T. Last previous edition approved in 2017 as Standards volume information, refer to the standard’s Document Summary page on
D1049–98(2017). DOI: 10.1520/D1049-98R22. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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SCOPE
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5.1 Before proceeding with these test methods, reference should be made to the specification of the material being tested. Any test specimen preparation, conditioning, dimensions, and testing parameters covered in the materials specification shall take precedence over those mentioned in these test methods. If there is no material specification, then the default conditions apply.  
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5.4 For relatively brittle materials, for which fracture propagation energy is small in comparison with the fracture initiation energy, the indicated impact energy absorbed is, for all practical purposes, the sum of factors 5.3.1 and 5.3.3. The toss correction (see 5.3.3) may represent a very large fraction of the total energy absorbed when testing relatively dense and brittle materials. Test Method C shall be used for materials that have an Izod impact resistance of less than 27 J/m (0.5 ft·lbf/in.). (See Appendix X4 for optional units.) T...
SCOPE
1.1 These test methods cover the determination of the resistance of plastics to “standardized” (see Note 1) pendulum-type hammers, mounted in “standardized” machines, in breaking standard specimens with one pendulum swing (see Note 2). The standard tests for these test methods require specimens made with a milled notch (see Note 3). In Test Methods A, C, and D, the notch produces a stress concentration that increases the probability of a brittle, rather than a ductile, fracture. In Test Method E, the impact resistance is obtained by reversing the notched specimen 180° in the clamping vise. The results of all test methods are reported in terms of energy absorbed per unit of specimen width or per unit of cross-sectional area under the notch. (See Note 4.)
Note 1: The machines with their pendulum-type hammers have been “standardized” in that they must comply with certain requirements, including a fixed height of hammer fall that results in a substantially fixed velocity of the hammer at the moment of impact. However, hammers of different initial energies (produced by varying their effective weights) are recommended for use with specimens of different impact resistance. Moreover, manufacturers of the equipment are permitted to use different lengths and constructions of pendulums with possible differences in pendulum rigidities resulting. (See Section 5.) Be aware that other differences in machine design may exist. The specimens are “standardized” in that they are required to have one fixed length, one fixed depth, and one particular design of milled notch. The width of the specimens is permitted to vary between limits.
Note 2: Results generated using pendulums that utilize a load cell to record the impact force and thus impact energy, may not be equivalent to results that are generated using manually or digitally encoded testers that measure the energy remaining in the pendulum after impact.
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1.1 This specification covers nonrigid tubing of vinyl chloride polymer or its copolymers with other materials for use in electrical insulation in three grades, as follows:  
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ABSTRACT
This specification covers the acceptance testing of insulating rubber matting that are used as a floor covering for the personal protection of workers. The sheeting shall be made from any elastomer or combination of elastomeric compounds. Two types of matting, differing in chemical and physical characteristics, are provided and are designated as Type I, which has been properly vulcanized, and Type II, which has one or more of the following special properties: (A) ozone resistance; (B) flame resistance; and (C) oil resistance. Five classes of matting, designated as Classes 0, 1, 2, 3, and 4, are assigned according to electrical protection characteristics. When evaluated in accordance with the test procedures detailed herein, the matting shall adhere to the following property requirements: electrical properties such as phase-phase maximum use voltage, AC and DC proof-test voltages, AC and DC dielectric breakdown test voltages, and AC and DC electrode clearances; an physical and chemical properties such as moisture absorption, oil resistance, tensile strength, tension set, elongation, resistance to accelerated heat aging, and flame resistance.
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X1.3 Significance and Use
X1.3.1 Tests made on a cellular plastic under conditions herein prescribed can be of considerable value in comparing the rate of burning and/or extent and time of burning of different materials, in controlling manufacturing processes, or as a measure of deterioration or change in burning characteristics prior to or during use.
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SCOPE
1.1 This specification covers acceptance testing of rubber insulating matting for use as a floor covering for protection of workers.  
1.2 Two types of matting, differing in chemical and physical characteristics, are provided and are designated as Type I and Type II matting.  
1.3 The following safety hazards caveat applies only to the test method portion, Sections 17 to 19, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: Rubber insulating matting should remain flexible for use through normal temperature ranges.
Note 2: Rubber as used in this specification is a generic term that includes elastomers and elastomer compounds, regardless of origin.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Technical specification
    9 pages
    English language
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  • Technical specification
    9 pages
    English language
    sale 15% off