jock said:Can 10mm twin/earth (for 10.5kw shower) be pushed down 20mm conduit?
jock said:Ta for the reply. OK, is it all right to strip the outer (grey) sheath and put the cores down separately?
jock said:It's a bungalow, so only from the loft to the shower - a metre at most. (I'm upgrading from 8kw, so changing cable from 6mm to 10mm.)
What about 10mm singles (red and black) with grey sheaths (like the 16mm "tails" feeding a domestic board)? Do these exist?
securespark said:there's a rule that says you have to have space left, 45%.
Baggy said:securespark said:there's a rule that says you have to have space left, 45%.
Really?! Damn! So does this mean you can't put two 2.5mm T&E cables down one 20mm conduit even though it will fit?
FWL_Engineer said:2 2.5T&E will be tight in a 20mm conduit and would not be recommended.
jock said:It's a bungalow, so only from the loft to the shower - a metre at most. (I'm upgrading from 8kw, so changing cable from 6mm to 10mm.)
FWL_Engineer said:To be perfectly honest I would not worry about those already in the conduit.
jock said:Ta for the reply. OK, is it all right to strip the outer (grey) sheath and put the cores down separately?
NO, if you damage the sheath of the cable inside the conduit you will never know and this could be potenially dangerous.
HOWEVER, if you stripped the T&E, sleeve the Earth, or replace it with an insulated conductor (1.5mm2 is big enough), making sure to make a really good joint on them, then four 2.5mm2 cores and two 1.5mm2 cores will easily fit in 20mm conduit and allow compliance and an air gap.
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