IEC 62420 pdf – Concentric lay stranded overhead electrical conductors containing one or more gap(s) 1 scope This International Standard specifies the electrical and mechanical characteristics ofconcentric lay stranded overhead electrical conductors，containing one or more self-supporting aluminium or aluminium alloy layer(s) as depicted in Figure 1, made ofcombinations of any of the following metal wires: a) hard-drawn aluminium as per...