On Tue, 26 Jan 2010 06:02:21 -0800, JJ wibbled:

I'm running both sides of a 2.5 T&E ring through the same 16x32mm
conduit
including running one 2.5 T&E unadulterated neatly through the back of
the
30mm pattress whilst the other one is cut, stripped, trimmed, and
twisted.

I don't see any issues. Technically, with round conduit you would apply a
grouping factor for 2 circuits in one tube - but as 16x32 is likely to
leave the cables apart, each one should suffer less as it will
effectively have its own bit of conduit/plaster surface to lose heat
through and it's the heating/cooling that rates the current carrying
capacity of a cable.






--
Tim Watts

Managers, politicians and environmentalists: Nature's carbon buffer.