On 29/01/2020 16:43, harry wrote:
On Wednesday, 29 January 2020 14:23:45 UTC, Tim Watts wrote:
Hi,

1) Unless the manufacturer says otherwise, is it still considered the
"done thing" to use suitably sized T+E for the final connection to a
freestanding cooker, on the basis it doesn't move much?

Looking at a lumpy induction beast - 45A circuit, so 6mm2 at a pinch,
10mm2 probably better as the ambient temperature is likely to be "warm"
(=35C)



2) Some manufacturers specify H07 type cable. 6mm2 will suffice due to
higher permissible running temperature. But that's now a big fat 15mm
dia rubber cable.

Are there any cooker outlet plates that are more generous than normal,
because pretty sure 15mm isn't going to fit well in the average one.



If not, the only solution I can think of (apart from ignoring the
manufacturer) would be an external 45A joint with T+E back to the plate
and shoved behind a cupboard.

Or, possibly feeding the H07 through the 25mm conduit and jointing
directly in the isolator. Not so easy to disconnect and I'd need to make
a mask for the outlet box to protect the cable from the backbox edges.




You're not likely to have everything on at once anyway.


Some hobs have a "feature" where you can restrict the maximum load
presented to match the capability of the supply, so permitting the use
of a lower rated cable, provided the MCB/RCBO is dimensioned to suit the
cable.