Northern Territory Consolidated Regulations Northern Territory Consolidated Regulations(1) The wiring of electrical equipment of a vehicle, except the high tension ignition wiring, must:
(a) be supported at intervals of not over 600 millimetres, unless the vehicle is a pole-type trailer with a pole with an adjustable length, or an extendible trailer; and
(b) be insulated at each of its joints; and
(c) be located where it cannot:
(i) become overheated; or
(ii) contact moving parts; or
(iii) come near enough to the fuel system to be a fire hazard; and
(d) be protected from chafing.
(2) The electrical connectors between motor vehicles and trailers, for operation of the vehicle lights required by the Vehicle Standards, must comply with Australian Standard AS 2513-1982 Electrical Connections for Trailer Vehicles .
(3) A trailer must be equipped with an electrical conductor, independent of the trailer coupling, that provides a return path between the electrical circuits of the trailer and towing vehicle.
(4) The electrical wiring, connections and installations of a semi-trailer, dog trailer or converter dolly used in a road train over 19 metres long after June 1998 must comply with third edition ADR 63, whether or not it was built before the date stated in the ADR for vehicles of that type.