Scope 1.1 This standard specifies the electrical and mechanical properties of circular wire concentric stranded hollow conductors. The circular wire concentric stranded hollow conductor is composed of any of the following metal single wires: a) Aluminum and aluminum alloy wire L-type hard aluminum wire, in accordance with GB/T 17048-2017; L1 type hard aluminum wire, in accordance with GB/T 17048-2017; L2 type hard aluminum wire, in accordance with GB/T 17048-2017; L3 type hard aluminum wire, in accordance with GB/T 17048-2017; LHA1 aluminum alloy wire, in accordance with GB/T 23308-2009; LHA2 aluminum alloy wire, in accordance with GB/T 23308-2009; LHA3 aluminum alloy wire, in accordance with NB/T 42042-2014; LHA4 aluminum alloy wire, in accordance with NB/T 42042-2014. b) Galvanized steel wire G1A type steel wire for overhead stranded wire, in accordance with GB/T 3428-2012; G2A type steel wire, in accordance with GB/T 3428-2012; G3A type steel wire, in accordance with GB/T 3428-2012; G4A type steel wire, in accordance with GB/T 3428-2012; G5A type steel wire, in accordance with GB/T 3428-2012; Note 1: When special engineering requires it, G1B or G2B steel wires in GB/T 3428-2012 can be used. c) Aluminum clad steel wire LB14 type aluminum clad steel wire, in accordance with GB/T 17937-2009; LB20A aluminum clad steel wire, in accordance with GB/T 17937-2009; LB27 aluminum clad steel wire, in accordance with GB/T 17937-2009; LB35 aluminum clad steel wire, in accordance with GB/T 17937-2009; LB40 aluminum clad steel wire, in accordance with GB/T 17937-2009
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