I need to connect 3 x 10mm^2 T&E cables at a cooker outlet plate -
unfortunately, the MK one that I have can only accommodate 2 x 10mm^2
cables. I can make everything fit by snipping off 3 out of the 7
strands of each conductor - is it acceptable to do this just at the
point of termination, or does anyone know of cooker outlet plates that
will accommodate 3 x 10mm^2 cables?
Why are you attempting to attach 3 10mm cables at a cooker outlet plate?
This is not its designed purpose. Perhaps an alternative might suggest
itself if we know what you are trying to achieve.
If you're feeding two 10mm Cables from just one other, then you're way over
the design limits of the load on the cable. One 10 mm Cable will definitely
"Not" supply two loads which require that size of cable.
Could you explain why you need three cables to connect at the one point ?
Presumably short circuit protection at the end of the 2.5mm section would
require earth loop impedence that may be difficult to achieve with a long
length of 2.5mm. A type B MCB would require 250A to be sure of breaking. I
wish you could get "Type A" MCBs, particularly in large ratings. In a
domestic environment, these larger breakers are used for entirely resistive
loads (i.e. showers and cookers) where the elements are unlikely to have
inrush currents of any significance.
I would make these "Type A"s break instananeously at 1.2 nominal load and
have the thermal stuff still there for backup. There are many applications
where these would have considerably better fire safety than a Type B and in
some cases could allow longer runs of cable (where limited by earth loop
impedence rather than voltage drop). Designing for 5 times nominal load is a
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