1、Designation:F47814a(Reapproved 2019)Standard Specification forIn-Service Care of Insulating Line Hose and Covers1This standard is issued under the fixed designation F478;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of las
2、t revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the in-service care,inspection,testing,and use voltage of insulating line hose and covers forprotectio
3、n of workers from accidental contact with energizedelectrical wires or equipment.1.2 The following safety hazards caveat applies only to thetest method portion,Section 7,of this specification:Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the
4、 responsibility of the userof this standard to establish appropriate safety,health,andenvironmental practices and determine the applicability ofregulatory limitations prior to use.Specific precautionarystatements are given in 7.2.1.1.3 This international standard was developed in accor-dance with in
5、ternationally 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:2D1049
6、Specification for Rubber Insulating CoversD1050 Specification for Rubber Insulating Line HoseD2865 Practice for Calibration of Standards and Equipmentfor Electrical Insulating Materials TestingF819 Terminology Relating to Electrical Protective Equip-ment for Workers2.2 ANSI Standards:C 84.1 Voltage
7、Ratings for Electric Power Systems andEquipment(60 Hz)3C 39.5 Safety Requirements for Electrical and ElectronicMeasuring and Controlling Instrumentation32.3 IEEE Standard:IEEE Standard 4 Techniques for High Voltage Testing43.Terminology3.1 breakdownthe electrical discharge or arc occurringbetween th
8、e electrodes and through the equipment being tested.3.2 bulk storage the storage of hose or covers togetherwith one or more layers piled neatly,but without the benefit ofspacers,supports,or special protective containers.3.3 coveran electrically insulated enclosure designed tobe installed temporarily
9、 on various types of irregularly shapedelectrical equipment to protect personnel and equipment work-ing in the close proximity.3.4 designated personan individual who is qualified byexperience or training to perform an assigned task.3.5 distortedphysically changed from the natural andoriginal shape,c
10、aused by stress of any type.3.6 electrical testing facilitya location with qualifiedpersonnel,testing equipment,and procedures for the inspectionand electrical testing of electrical insulating protective equip-ment.3.7 electrodethe energized or grounded conductor portionof electrical test equipment
11、which is placed near or in contactwith the material or equipment being tested.3.8 flashoverthe electrical discharge or arc occurring be-tween electrodes and over or around,but not through,theequipment being tested.3.9 hosean electrical insulating tube with a longitudinalslit designed to be installed
12、 temporarily on energized electricalwires.3.10 ozonea very active form of oxygen that may beproduced by corona,arcing,or ultraviolet rays.3.11 ozone cutting and checking cracks produced byozone in a material under mechanical stress.1This specification is under the jurisdiction of ASTM Committee F18
13、onElectrical Protective Equipment for Workers and is the direct responsibility ofSubcommittee F18.25 on Insulating Cover-Up Equipment.Current edition approved April 1,2019.Published April 2019.Originallyapproved in 1976.Last previous edition approved in 2014 as F478 14a.DOI:10.1520/F0478-14AR19.2For
14、 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.3Available from American National Standards Institute(ANSI),25 W.43rd
15、St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from Institute of Electrical and Electronics Engineers,Inc.,445 HoesLane,Piscataway,NJ 08854-4150.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was
16、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 3.12 retestthe tests given after the initial acceptance test,usually performed at regular periodic intervals or as requiredbecause of physical inspection.3.13 voltage,maximum retestvoltage,either ac rms or dcaverage,
