It's advisable to run the cables as high as possible to reduce the chance of heat
or impact damage - at least 75mm (3ins) and ideally 125mm (5ins) away from
any potential sources.

Cable conduits can be the 'clip together' uPVC type, galvanised steel or wood.
But whatever the type, they must be firmly fixed at around 900mm (3ft) intervals.
To minimise the chance of sparks coming off a damaged cable and igniting
nearby fuels, cables must be kept at least 30mm (2ins) away from fuel and gas
pipes - unless the pipe or the cable is in a suitable conduit or duct. [3.4]