ASTM_D_178_-_19.pdf

Designation:D17819Standard Specification forRubber Insulating Matting1This standard is issued under the fixed designation D178;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript 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.Scope1.1 This specification covers acceptance testing of rubberinsulating matting for use as a floor covering for protection ofworkers.1.2 Two types of matting,differing in chemical and physicalcharacteristics,are provided and are designated as Type I andType II matting.1.3 The following safety hazards caveat applies only to thetest method portion,Sections 17 to 19,of this specification:This standard does not purport to address all of the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this standard to establish appropriate safety,health,and environmental practices and determine the appli-cability of regulatory limitations prior to use.NOTE1Rubber insulating matting should remain flexible for usethrough normal temperature ranges.NOTE2Rubber as used in this specification is a generic term thatincludes elastomers and elastomer compounds,regardless of origin.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD297 Test Methods for Rubber ProductsChemical Analy-sisD412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD471 Test Method for Rubber PropertyEffect of LiquidsD518 Test Method for Rubber DeteriorationSurfaceCracking(Withdrawn 2007)3D570 Test Method for Water Absorption of PlasticsD573 Test Method for RubberDeterioration in an AirOvenD1692 Method of Test for Rate of Burning or Extent andTime of Burning of Cellular Plastics Using a SpecimenSupported by a Horizontal Screen(Withdrawn 1976)32.2 American National Standard:4ANSI C84.1 Voltage Ratings for Electric Power Systems andEquipment(60 Hz)3.Terminology3.1 Definitions:3.1.1 user,nas used in 4.3.1,the entity employing theactual worker(s)utilizing the equipment;if no separateemployer,then the individual.3.1.2 voltage,maximum retest,nvoltage,either ac rms ordc avg,which is equal to the proof-test voltage for newprotective equipment.3.1.3 voltage,retest,nvoltage,either ac rms or dc avg,that used protective equipment must be capable of withstand-ing for a specified test period without breakdown.3.1.4 voltage,nominal design,na nominal value consis-tent with the latest revision of ANSI C84.1,assigned to thecircuit or system for the purpose of conveniently designatingits voltage class.3.1.5 voltage,maximum use,nthe ac voltage(rms)clas-sification of the protective equipment that designates themaximum nominal design voltage of the energized system thatmay be safely worked.The nominal design voltage is equal tophase-to-phase voltage on multiphase circuits.3.1.5.1 If there is no multiphase exposure in a system area,and the voltage exposure is limited to phase(polarity on dc1This 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 replacesANSI Standard J 6.7,which is no longer available.Current edition approved Jan.1,2019.Published February 2019.Originallyapproved in 1923.Last previous edition approved in 2010 as D178 01(2010).DOI:10.1520/D0178-19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from American National Standards Institute,11 West 42nd Street,13th Floor,New York,NY 10036.Copyright 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 Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 systems)to ground potential,the phase(polarity on dc sys-tems)to ground potential shall be considered to be the nominaldesign voltage.3.1