I have just bought a new cooker (Smeg SUK61MF5) which has a gas hob
and electric oven. The cooker is rated at 13A (in fact it came with a
13A 3 pronged plug attached). I wish to fit the cooker to its own
circuit on the mains as i don't want any unnecessary leads over my
worktops. The current MCB for the cooker circuit is 32A (it has the
following written on the MCB - manufacturer:CPN; code: MC132B B32).
As the cooker is 13A I would like to change this MCB to 13A. Firstly,
does this sound sensible? Secondly, I can't seem to find a supplier
of 13A MCBs but have found 10A, 16A and 20A - can you point me to
one? Thirdly, would one of these alternative current MCBs work just
as well?

Any help greatly appreciated.

Lee

On 31 May 2007 04:07:49 -0700 someone who may be DaviesL
wrote this:-

I have just bought a new cooker (Smeg SUK61MF5) which has a gas hob
and electric oven. The cooker is rated at 13A (in fact it came with a
13A 3 pronged plug attached). I wish to fit the cooker to its own
circuit on the mains as i don't want any unnecessary leads over my
worktops. The current MCB for the cooker circuit is 32A (it has the
following written on the MCB - manufacturer:CPN; code: MC132B B32).
As the cooker is 13A I would like to change this MCB to 13A. Firstly,
does this sound sensible?

It is one approach and probably the neatest/easiest, if you are
competent to do the work in the consumer unit.

Secondly, I can't seem to find a supplier
of 13A MCBs but have found 10A, 16A and 20A - can you point me to
one?

I would be very surprised if you could get one of that rating.

Thirdly, would one of these alternative current MCBs work just
as well?

You should fit the 16A one. This should protect the flex
adequately.

How are you intending to connect the flex to the fixed wiring?


--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54

DaviesL wrote:

I have just bought a new cooker (Smeg SUK61MF5) which has a gas hob
and electric oven. The cooker is rated at 13A (in fact it came with a
13A 3 pronged plug attached). I wish to fit the cooker to its own
circuit on the mains as i don't want any unnecessary leads over my
worktops. The current MCB for the cooker circuit is 32A (it has the
following written on the MCB - manufacturer:CPN; code: MC132B B32).
As the cooker is 13A I would like to change this MCB to 13A. Firstly,
does this sound sensible? Secondly, I can't seem to find a supplier
of 13A MCBs but have found 10A, 16A and 20A - can you point me to
one? Thirdly, would one of these alternative current MCBs work just
as well?

I take it the exiting install already has a suitable cable in place?

What is currently on the end of this cable?

The MCB fitted should offer the required fault protection to the cable.
So if you already have all that fitted, then all you need to is fit a
socket to the end of it in a suitable location for the cooker, and plug
it in. The fuse in the plug will provide adequate protection for the
cooker. With cookers it is desirable to have a way of isolating the
supply that does not involve having to pull the cooker out. So a socket
positioned at the back of an adjacent cupboard can work well here if you
want to save fitting an isolating switch above the worktop.

If you want to reduce the MCB size as well you can. A 16A one would be
the nearest match. However as long as the present one is appropriate for
the cable the circuit is wired in, you could leave it alone.

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

Thanks all.

There's a connector box in the wall which is then wired (in the wall)
to the cooker switch (you know the one with the big red switch) above
the worktop. I was intending on connecting the cooker to that and
just changing the MCB fuse. I don't particularly want to remove the
connector box and replace it with a socket.

So my plan of action is change the MCB to a 16A and then wire the
cooker up via the connector box in the wall behind the cooker to the
big red isolating switch above the worktop. Sound good?

Thanks again.
Lee

DaviesL wrote:

There's a connector box in the wall which is then wired (in the wall)
to the cooker switch (you know the one with the big red switch) above
the worktop. I was intending on connecting the cooker to that and
just changing the MCB fuse. I don't particularly want to remove the
connector box and replace it with a socket.

So my plan of action is change the MCB to a 16A and then wire the
cooker up via the connector box in the wall behind the cooker to the
big red isolating switch above the worktop. Sound good?

Yup, should be fine.

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

On Thu, 31 May 2007 04:07:49 -0700, DaviesL wrote:

I have just bought a new cooker (Smeg SUK61MF5) which has a gas hob
and electric oven. The cooker is rated at 13A (in fact it came with a
13A 3 pronged plug attached). I wish to fit the cooker to its own
circuit on the mains as i don't want any unnecessary leads over my
worktops. The current MCB for the cooker circuit is 32A (it has the
following written on the MCB - manufacturer:CPN; code: MC132B B32).
As the cooker is 13A I would like to change this MCB to 13A. Firstly,
does this sound sensible? Secondly, I can't seem to find a supplier
of 13A MCBs but have found 10A, 16A and 20A - can you point me to
one? Thirdly, would one of these alternative current MCBs work just
as well?

Any help greatly appreciated.


The simplest would be to change the cooker flex outlet unit behind the
cooker to a single unswitched 13A socket. No change of MCB required.

Or cut off plug and wire into to the cooker flex outlet and change MCB to
16A.


--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html
Choosing a Boiler FAQ http://www.makewrite.demon.co.uk/BoilerChoice.html
Gas Fitting Standards Docs he http://www.makewrite.demon.co.uk/GasFittingStandards

On 31 May, 12:16, Owain wrote:
DaviesL wrote:
I have just bought a new cooker (Smeg SUK61MF5) which has a gas hob
and electric oven. The cooker is rated at 13A (in fact it came with a
13A 3 pronged plug attached). I wish to fit the cooker to its own
circuit on the mains as i don't want any unnecessary leads over my
worktops. The current MCB for the cooker circuit is 32A (it has the
following written on the MCB - manufacturer:CPN; code: MC132B B32).
As the cooker is 13A I would like to change this MCB to 13A. Firstly,
does this sound sensible?

Yes, as the flex for the cooker may not be (probably isn't) rated for 32A



16A would be preferred, 20A would probably be okay.

Owain

Umm - and just how long will it be passing 32A before the MCB trips ?
Milliseconds !! And it is very unlikely that it will be passing
anything other than its normal working current or something well in
excess that will trip the MCB whether it is 16A or 32A.

Rob

On 31 May 2007 10:46:51 -0700, robgraham
mused:

On 31 May, 12:16, Owain wrote:
DaviesL wrote:
I have just bought a new cooker (Smeg SUK61MF5) which has a gas hob
and electric oven. The cooker is rated at 13A (in fact it came with a
13A 3 pronged plug attached). I wish to fit the cooker to its own
circuit on the mains as i don't want any unnecessary leads over my
worktops. The current MCB for the cooker circuit is 32A (it has the
following written on the MCB - manufacturer:CPN; code: MC132B B32).
As the cooker is 13A I would like to change this MCB to 13A. Firstly,
does this sound sensible?

Yes, as the flex for the cooker may not be (probably isn't) rated for 32A



16A would be preferred, 20A would probably be okay.

Owain

Umm - and just how long will it be passing 32A before the MCB trips ?
Milliseconds !!

Er, no.
--
Regards,
Stuart.