In article , Robin
wrote:
On 30/01/2020 13:47, 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.

Cheers,

Tim

Look up 'diversity', you don't need anywhere near 15mm2.


15mm is the /external/ diameter of the 6mm cable in mind for a 45A
supply; and I'd be wary of anything less than a 45A circuit without
knowing more about the cooker and the cook's habits. Some of the
all-electric stoves with induction hobs are heading for 20kW these days.
And I'm also minded to have some regard to the maker's instructions.

Cable is measured by conductor size, not outside diameter. When you say
15mm, electricians think of 76A rated cable.

--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle