4.2.2 - Cables for overhead lines

Any of the cables listed in the previous subsection are permitted to be used as overhead conductors provided that they are properly supported. Normally, of course, the cables used will comply with a British Standard referring particularly to special cables for use as overhead lines. Such cables include those with an internal or external catenary wire, which is usually of steel and is intended to support the weight of the cable over the span concerned.

Since overhead cables are to be installed outdoors, they must be chosen and installed so as to offset the problems of corrosion. Since such cables will usually be in tension, their supports must not damage the cable or its insulation. More information on corrosion is given in {4.2.5} and on the selection and installation of overhead cables will be found in {7.13.1}.