ASTM_F_1883_-_03_2013.pdf

Designation:F188303(Reapproved 2013)An American National StandardStandard Practice forSelection of Wire and Cable Size in AWG or Metric Units1This standard is issued under the fixed designation F1883;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 This practice is intended as a guide to shipbuilders,shipowners,and design agents for use in the selection ofconductor size for single conductor or multiple conductor cablesizes either in American Wire Gauge(AWG)or metric desig-nations for commercial ship design and construction.1.2 The comparison chart of electrical conductor sizesshown in Table 1 presents a combined listing of internationalstandard sizes of Class 2 stranded copper conductors inaccordance with AWG(Specification B8)English units or IEC(IEC 60228)metric units.1.3 As a precautionary caveat,some conductor sizes listedin Table 1 may exceed minimal size requirements of the U.S.Coast Guard,theAmerican Bureau of Shipping,and IEEE STD45 for specific applications.1.4 The values stated for ampacity and dc resistance arepresented as maximum values and are provided for informationonly.2.Referenced Documents2.1 ASTM Standards:2B8 Specification for Concentric-Lay-Stranded CopperConductors,Hard,Medium-Hard,or SoftB193 Test Method for Resistivity of Electrical ConductorMaterials2.2 IEC Standards:3IEC 60092-350 Electrical Installations in ShipsPart 350:Shipboard Power:CablesGeneral Construction and TestRequirementsIEC 60228 Conductors of Insulated Cables2.3 IEEE Standard:4IEEE STD 45 Recommended Practice for Electric Installa-tions on Shipboard3.Significance and Use3.1 The selection criteria is to be applied for uses of(1)newcable and(2)replacement cable.3.2 For the selection of new cable or the selection ofreplacement cable,this practice defines the choice criteria forconductor selection for cables in AWG(ASTM)or metric(IEC)sizes.4.Selection Criteria4.1 When selecting cable for any application,AWG ormetric sizing should be selected according to preferred sizes.The sizes of conductors that have been marked with an asteriskin Table 1 designate preferred sizes per Specification B8 andIEC 60228.Those sizes not marked are given for reference,and it is recommended that their use be discouraged.4.2 When selecting cable for any application,AWG ormetric sizing should be selected with full consideration of therelationship of type of insulation and ampacity.Direct selectionbetween AWG and metric sizes can be made only after adetermination of the equivalence of insulation is made.4.3 When selecting cable,the conductor size will be deter-mined from analysis of required ampacity,voltage dropconsiderations,type of cable insulation,and planned installa-tion.Recommended practices for selection and installation ofcable systems are detailed in IEEE STD 45 and IEC 60092-350.4.4 For the selection of cable sizes for new applications,conductor size that satisfies ampacity requirements,voltagedrop factors,and the adequacy for application in the availablecable space must also be considered.4.5 For the selection of cable sizes for replacementapplications,cable size should be selected in excess of or equalto the replaced cable size.Existing cable space limitationsshould then be determined to ensure that space for installationof the replacement cable is adequate.1This specification is under the jurisdiction of ASTM Committee F25 on Shipsand Marine Technologyand is the direct responsibility of Subcommittee F25.10 onElectrical.Current edition approved May 1,2013.Published May 2013.Originallyapproved in 1998.Last previous edition approved in 2008 as F1883 03(2008).DOI:10.1520/F1883-03R13.2For 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 International Electrotechnical Commission(IEC),3 rue deVaremb,Case postale 131,CH-1211,Geneva 20,Switzerland,http:/www.iec.ch.4Available from Institute of Electrical and Electronics Engineers,Inc.(IEEE),445 Hoes Ln.,P.O.Box 1331,Piscataway,NJ 08854-1331,http:/www.ieee.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.Keywords5.1 AWG conductor sizes;cable selection;conductor com-parison;metric conductor sizesTABLE 1 Conversion TableAWG/Metric Preferred Sizes ofConductorsSizeMetric,mm2SizeAWG/MCMArea inCirc Mils(Nominal)AmpacityAdc Resistances at 20CBOhmsper 1000 ftOhmsper km2000*C2 000 00011550.00530.01771000*1 970 00011450.00540.01761750*1 750 00010700.00630.0199800*1 580 00010090.00670.02241500*1 500 0009800.00710.02321250*1 250 0008900.00850.0278630*1 240 0008860.00960.02861000*1 000 0007800.01060