Roger Hayter wrote:

ARW wrote:

On 20/01/2017 16:33, Robin wrote:
On 20/01/2017 14:09, Dave Plowman (News) wrote:
In article ,
Bert Coules wrote:
The kitchen in my newly-(almost) completed extension has a
(professionally installed) 45A radial cooker circuit which currently
terminates in a junction box. I don't intend to install a cooker but I
do need to power an electric domino hob and a fridge-freezer close to
where the box is situated. Is there any reason why I can't take two
2.5mm cables from the junction box via two switches to two sockets, to
do so?

Yes. But change the MCB to a 20 amp one.


A 32 amp MCB would also do if the 2.5mm cable is a reasonably short spur
running to a single socket or twin socket. (It's even shown in Appendix
15 to BS7671:2008 which I've had to show a doubter.)

I don't know if the adiabatic equation would stretch to 45A!

What do think of this one?

16mm T&E straight into the meter with a 100A 1361 type II fuse for
protection.

http://wiki.diyfaq.org.uk/index.php/File:Equation.jpg

It's about a 20m run of cable mostly just thrown across the floor of a
building site with no mechanical protection to power the site cabin.
It's only mostly because there is the bit where it is just suspended
with a couple of cable ties at each end at just above head height
between the house and the site cabin with no catenary wire.

Did you mean 16mm? I would have thought that would have been ok until
someone rested on a spade on it. But it looks somewhat smaller.

(FAOD I am not asserting that 16mm^2 *would* be adequate without further
information. It was a joke. Alright?)

--

Roger Hayter