I want to get 2 2.5mm T&E, 1 1.5mm T&E & 1 6mm T&E cables from one building to another using conduit. What size will i need? Will it be 2 x 20mm or 2 x 25mm? Were in regs do i find this info? It seems just to be for singles, is they an easy way of working out?
Not more than 45% of the conduit space can be taken up by cables (including their insulation). Work out the CSA of the conduit and then of the cables you intend to run through it.
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