I've just bought new bosch ovens etc. My problem is the instructions have confused me.

We have a 32a fuse in the main consumer unit. this goes to a cooker isolating switch on the kitchen wall. from there one 6mm cable goes to the existing a 13a fused connection plate for the gas hob. We plan to just swap like for like. A second 6mm cable goes to another 13a fused connection plate for the old single oven. Our new single is rated at 2.9kw and 13a so we plan to swap like for like (although with a much longer cable as it is in another part of the room now).

Our problem is how to connect a new multi function oven. The spec is 3.6kw total connected load. Elsewhere it says it is fitted with a plug (which it isn't) and must be installed via an earthed socket with fuse protection of 16a, unless the plug is not accessible then an all pole isolator must be used on the connection side. it later says in the GB to permanently connect it and use the isolator.

Can I continue the 6mm cable from the single oven on to this multifunction oven? [logistically the easier answer by far] if so how do I achieve the 16a fuse protection? Is it ok to have both ovens on this same spur? Or should I come from the main consumer unit totally seperately using a 16a fuse there?

Can I continue the 6mm cable from the single oven on to this
multifunction oven? [logistically the easier answer by far] if so how
do I achieve the 16a fuse protection?

It sounds like a typical European device that would have its own 16A MCB
protection at the consumer unit. Assuming you don't want to rewire in that
manner,

I would suggest something like:

http://www.tlc-direct.co.uk/Products/BHCT2.html

and

http://www.tlc-direct.co.uk/Products/CM7116B.html

If you've got space to mount them somewhere near the oven. Note that you
also need a DP isolator. The MCB switch will meet this requirement, so you
need a 20A DP switch if the cooker control unit is not close enough to the
oven.

Christian.

also need a DP isolator. The MCB switch will meet this requirement, so you
need a 20A DP switch if the cooker control unit is not close enough to the

Of course, i meant the MCB switch will NOT meet this requirement.

Christian.

In article ,
finney wrote:
Our problem is how to connect a new multi function oven. The spec is
3.6kw total connected load. Elsewhere it says it is fitted with a plug
(which it isn't) and must be installed via an earthed socket with fuse
protection of 16a, unless the plug is not accessible then an all pole
isolator must be used on the connection side. it later says in the GB
to permanently connect it and use the isolator.

Yup.

Can I continue the 6mm cable from the single oven on to this
multifunction oven? [logistically the easier answer by far] if so how
do I achieve the 16a fuse protection? Is it ok to have both ovens on
this same spur? Or should I come from the main consumer unit totally
seperately using a 16a fuse there?

Remove the existing FCU and replace it with a cooker connection unit. This
is essentially a 45 amp connector block mounted on the back of a one gang
plate with a cable outlet. Run 6mm cable from there to the oven.
This type of oven doesn't normally have any internal or external fusing
other than the main MCB.

You can also get what just amounts to a blank plate with cable outlet -
designed for where you're using a continuous cable from switch to oven.

--
*If only you'd use your powers for good instead of evil.

Dave Plowman London SW
To e-mail, change noise into sound.

Dave Plowman (News) wrote:


Our problem is how to connect a new multi function oven. The spec is
3.6kw total connected load. Elsewhere it says it is fitted with a plug
(which it isn't) and must be installed via an earthed socket with fuse
protection of 16a, unless the plug is not accessible then an all pole
isolator must be used on the connection side. it later says in the GB
to permanently connect it and use the isolator.

Remove the existing FCU and replace it with a cooker connection unit. This
is essentially a 45 amp connector block mounted on the back of a one gang
plate with a cable outlet. Run 6mm cable from there to the oven.
This type of oven doesn't normally have any internal or external fusing
other than the main MCB.

Yup. Doing this means violating the letter of the installation
instructions; but it's hard to conceive of this actually affecting
safety materially. The fusing in the supply is to protect the cable, not
the appliance: by running the cable as 6mm all the way, you're using
cable which can take the nominal rating of the 32A MCB indefinitely.
(Since the oven won't generate a load of more than 3.6kw = 15A@240V, you
could wire its drop from the FCU in 4mmsq or even 2.5mmsq, but that
would require calculations to show it's safe (they've been done here on
this NG, and been so shown for 'reasonable' lengths of feed and tail;
but sticking to 6mmsq keeps any 'ordinary' and/or picky NICEIC
periodic-inspecting type in familiar territory...). It's *extremely*
difficult to construct a plausible scenario where some appliance fault
would be cleared by a 16A breaker but not a 32A one - the fault
resistance would have to be unusually high and in a very precise band of
values for that to happen.

Stefek