Any line which is used for carrying electricity for any purpose and includes, unless the context otherwise requires: (a) any support for any such line, that is to say, any structure, pole or other thing in, on, by or from which any such line is or may be supported, carried or suspended; (b) any apparatus connected to any such line for the purpose of carrying electricity; and (c) any wire, cable, tube, pipe or other similar thing (including its casing or coating) which surrounds or supports, or is surrounded or supported by, or is installed in close proximity to, or is supported, carried or suspended in association with, any such line (section 64(1) of the Electricity Act 1989).