any electricians here need advice. power to shed

Found 9th May
Hello we are are in process of laying a patio but after this is done I want to build a shed/workshop at the end of the garden. before I lay the patio I want to lay cable ready as the patio will be the whole width of the garden.

Distance from consumer board to where shed will be is max 25m. will want a few strip lights and will only ever run a max of two tools maybe a halogen heater in winter. think it's 6mm armoured cable I need berried min 18 inches deep? other than a small breaker box in the shed would I need anything else

think this is the best place I've found it.
online-cables.co.uk/694…asp

6 Comments

6mm will be OK as it will allow for future expansion plans.

yes mate sounds about right.

Seem to recall a similar one, not sure how much it will cost to certify if you do it yourself, or even if it could be certified if it's already hidden under the patio.

6mm will be spot on.

Firstly, let me say that all electrical work involving new circuits should be installed and certified by a qualified electrician.
Burried depth consideration:


If you have a BS 7671-2008 regs book then regulation 522.8.10 is the guide to take. The last sentance is

" Buried cables, conduits, and ducts shall be at a sufficient depth to avoid being damaged by any reasonably foreseeable disturbance of the ground"

A rule of thumb is in a garden below one and half spade length or below 500mm and under drives and such under between 500-750 mm

Cable size wise 6mm "could and should" be ok. Protected with what size MCB? I would recommend a 20Amp. At the shed end, at the very least the sockets should be protected by RCD.

Edited by: "GrassSnakeUK" 10th May
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