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Advice on trench depth for SWA - Answered!

I'm planning to build a timber garden room for use as an amateur radio shack. It will have a TT mains supply from the house consumer unit. I can't attach the SWA to a fence as the boundary belongs to the neighbour so it will have to go underground.

The trench will be about 5 metres long under a gravel walkway and will cross a sewer pipe that is 600mm below the surface with an inspection cover nearby. How deep does the trench need to be?

Mike

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0 mapj1 over 3 years ago

Or very shallow indeed but under concrete slabs or inside something like a piece of scaff tube.
Avoids the risk of disturbance another way - by bending the thing coming towards it ;-) The actual depth is not as important as how the ground is used - so in the opposite case if you know marquees will be pegged out, or it will be ploughed, then a lot deeper than the usual 600mm for no special measures applies.
If the path is unlikely to be dug up in the next decade or 2 it is less of a concern than say a flower bed.
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0 mapj1 over 3 years ago

Or very shallow indeed but under concrete slabs or inside something like a piece of scaff tube.
Avoids the risk of disturbance another way - by bending the thing coming towards it ;-) The actual depth is not as important as how the ground is used - so in the opposite case if you know marquees will be pegged out, or it will be ploughed, then a lot deeper than the usual 600mm for no special measures applies.
If the path is unlikely to be dug up in the next decade or 2 it is less of a concern than say a flower bed.
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Advice on trench depth for SWA - Answered!

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