Optical cable installed on overhead conductor cable has casing with optical conductor within casing whose length exceeds the corrugated metal casing tube with longitudinal weld seam

摘要

The cable has a casing (1) with optical conductors (2) within the casing whose length exceeds that of the casing, which is a corrugated metal tube with a longitudinal weld seam. The metal tube can be made of aluminium or an aluminium alloy or of steel over its entire circumference with an outer coating of aluminium or an aluminium alloy.