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- 2 Jan 2019
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- 335
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So my shower is wired in 6mm. It's a 9.5kw. When I do the bathroom I'm altering it to a 10mm. The major problem is the existing cable is fed up the cavity into the loft and then down to the shower. The previous owner or a previous owner has had cavity wall insulation put in. So I cant use that route and I know cables going up the cavity is a no no. I'm an electrician but not domestic. Commercial and industrial. Mainly deal with trunling and conduit. Could I use the nib in this picture as a route to upstairs? It's a wall going into the kitchen at the end of the hall. The wall separating the hall from the kitchen. It's the stairs on one side and the wall to the back room on the other side