ASTM_F_2249_-_03_2015.pdf

Designation:F224903(Reapproved 2015)Standard Specification forIn-Service Test Methods for Temporary Grounding JumperAssemblies Used on De-Energized Electric Power Lines andEquipment1This standard is issued under the fixed designation F2249;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.1.Scope1.1 These specifications cover the in-service inspection andelectrical testing of temporary protective grounding jumperassemblies which have been used by electrical workers in thefield.1.2 These specifications discuss methods for testing ground-ing jumper assemblies,which consist of the flexible cables,ferrules,clamps and connectors used in the temporary protec-tive grounding of de-energized circuits.1.3 Manufacturing specifications for these groundingjumper assemblies are in Specifications F855.1.4 The application,care,use,and maintenance of thisequipment are beyond the scope of this specification.1.5 Units of measurement used in this specification are inthe Metric system(SI)with English units given in parentheses.1.6 The following safety hazards caveat pertains only to thetest portions of this specification.This standard does notpurport to address all of the safety concerns,if any,associatedwith its use.It is the responsibility of the user of this standardto establish appropriate safety and health practices anddetermine the applicability of regulatory requirements prior touse.2.Referenced Documents2.1 ASTM Standards:2B193 Test Method for Resistivity of Electrical ConductorMaterialsF855 Specifications for Temporary Protective Grounds to BeUsed on De-energized Electric Power Lines and Equip-ment2.2 IEEE Standards:3IEEE Standard 801986 IEEE Guide for Safety in ACSubstation GroundingIEEE Standard 10481990 IEEE Guide for the ProtectiveGrounding of Power Lines3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 grounding jumper assemblygrounding cable withconnectors and ground clamps attached,also called a ground-ing jumper or a protective ground assembly installed tempo-rarily on de-energized electric power circuits for the purpose ofpotential equalization and to conduct a short circuit current fora specified duration(time).4.Significance and Use4.1 Grounding jumper assemblies can be damaged by roughhandling,long term usage,weathering,corrosion,or a combi-nation thereof.This deterioration may be both physical andelectrical.4.2 The test procedures in this specification provide anobjective means of determining if a grounding jumper assem-bly meets minimum electrical specifications.These methodspermit testing of grounding jumper assemblies under con-trolled conditions.4.3 Each responsible entity must determine the requiredsafety margin for their workers during electrical fault condi-tions.Guidelines for use in the determination of these condi-tions are beyond the scope of this specification and can befound in such standards as IEEE Standard 801986 and IEEEStandard 10481990.4.4 Mechanical damage,other than broken strands,may notsignificantly affect the cable resistance.Close manual andvisual inspection is required to detect some types of mechani-cal damage.4.5 The test procedures in this specification should beperformed at a time interval established by the user to ensure1This specification is under the jurisdiction of ASTM Committee F18 onElectrical Protective Equipment for Workers and is the direct responsibility ofSubcommittee F18.45 on Mechanical Apparatus.Current edition approved May 1,2015.Published July 2015.Originally approvedin 2003.Last previous edition approved in 2009 as F2249-03(2009).DOI:10.1520/F2249-03R15.2For 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.3Available from the Institute of Electrical and Electronics Engineers,Inc.(IEEE)1828 L St.,NW,Suite 1202,Washington,CD 200365104.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 that defective grounding jumper assemblies are detected andremoved from service in a timely manner.4.6 Retest the grounding jumper assembly after performingany maintenance,in order to ensure its integrity.5.Inspection of Grounding Jumper Assemblies5.1 Visual inspection shall be made of all grounding jumperassemblies prior to testing.5.1.1 If the following defects are evident,the groundingjumpers may be rejected without electrical testing:5.1.1.1 Cracked or broken ferrules and clamps,5.1.1.2 Exposed broken strands,5.1.1.3 Cut or badly mashed or flattened cable,5.1.1.4 Extensively damaged cable-covering material,5.1.1.5 Swollen cable jacket or soft spots,indicating inter-nal corrosion,and5