SC 7 - Software and systems engineering

Applies to zinc-coated steel wires used in the construction and/or reinforcement of conductors for overhead power transmission        purposes, and is intended to cover all wires used in construction  where the individual wire diameters, including coating, are in the range of 1.25 mm to 5.50 mm.                                       Three grades of steel are included to reflect the needs of         conductor users: regular steel, high strength steel and extra high strength steel.                                                    Two classes of coating represented by minimum zinc mass per unit   area are included: Class 1 and Class 2.                           [
]This English-language version is derived from the original bilingual publication by leaving out all French-language pages. Missing page   numbers correspond to the French-language pages.

Specifies the electrical and mechanical characteristics of round wire concentric lay overhead electrical stranded conductors.     Supersedes IEC 60207, 60208, 60209 and 60210.                   [
]This English-language version is derived from the original bilingual publication by leaving out all French-language pages. Missing page   numbers correspond to the French-language pages.

Specifies volume resistivity, tensile strength, 0.2 per cent proof stress and elongation after fracture for heat-treated aluminium alloy busbar material of the AI-Mg-Si type.[
]The contents of the corrigendum of January 1959 have been included in this copy.