IEC 62420 Ed. 1.0 b:2008

IEC 62420:2008 specifies the electrical and mechanical characteristics of concentric lay stranded overhead electrical conductors, containing one or more self-supporting alumimium or aluminium alloy layer(s) made of combination of any of the following metal wires:

– Hand drawn aluminium as per IEC 60889, designated A1;

– aluminium alloy type A or B as per IEC 60104, designated A2 or A3;

– thermal resistant aluminium alloy as per IEC 62004, designated AT1, AT2, AT3, or AT4;

– regular strength steel as per IEC 60888, designated S1A or S1B;

– high strength steel as per IEC 60888, designated S2A or S2B;

– extra-high strength steel as per IEC 60888, designated S3A;

– aluminium-clad steel as per IEC 61232, designated 20SA, 27SA, 30SA or 40SA.