Mains Power Cable Depth

Under a driveway you may only need 12 inches of burial depth.

Mains power cable depth.

This cable should be buried at a depth of 24 inches. Polypipe rigiduct outside diameter is 38mm. This is available from our approved suppliers. All cables and ducts for lv mains and 11kv circuits are to be installed by central networks or its agents.

Outside diameter is 125mm. A depth of 240mm below gardens and paths 100mm below roads and 650mm below agricultural land. The cable is less likely to be cut or disturbed by typical digging if it is this far below ground. Conduits are required for installation in 2 inches of solid rock with concrete.

To be used for single phase service cables only. These depth reductions apply no matter which burial method is chosen. The generally applicable depth is 12 inches or you can reduce it to 6 inches if you protect the cables with 2 inches of concrete. Minimum excavation depth required a minimum depth duct cable size c 75mm of sand bedding please note that m represents the cable marker tile for 33kv.

Mains cable for rural installations and cable runs up to 200 metres is 95 mm 2 four core aluminium with high impact sheathing. At 24 inches you can bury underground feeder cable using pvc conduit to 18 inches below ground only where the wire comes up. At 18 inches you can use thwn 2 conductors inside a continuous length of pvc conduit which protects the wire all the way through the trench to the house. However there is guidance.

Direct cable burial uf cable underground feeder cable is specially designed and manufactured with properties that make it ideal for burial. Mains cable for urban or suburban installations with cable runs up to 50 metres is often single core 16 mm 2 neutral screen or three core 16 mm 2 neutral screen.