Any electricians out there?

My oven is a 220 Volt one phase device according to the specs but it consumes 3700 Watt (max).

How is that possible with a 10 Amp fuse.....Yeah even with a 16 A fuse?

Thanks.

In Switzerland the ovens and stovetops are often single phase devices, but with multiple feeds.

eg: my stove top is single phase, but connected to 3 breakers.
One breaker per 2 elements

So if one breaker fails, I loose 2 elements, but the other 2 still work.
I found this out when it happened :-)

It's just OK with a 16 A fuse, some ovens can also run on 3 phase, it's fairly usual here & in DE, not in the UK however.

if everything is on then thats the 3700w, most of time its not so 3700 and 220v is just under 16A.

if it trips look to install a higher rating fuse or CB.

our oven has 2 seprate CB's - you may have the same.

It's connected to 2 phases of a 3 phase supply so the feed is approx 385V.

http://en.wikipedia.org/wiki/Three-phase

Why are you concerned? If the oven works then I wouldnt even worry, however its breaking regular then clearly there is a problem.

Generally though if the oven works so what if its using a little bit more then you expected as electricity here is one of the cheapest things you will find.

A few clarifying comments.

The oven is not installed yet. I am just trying to figure out how to arrange installations in the kitchen.

The oven has only one connection to a single phase, the zero/nil and ground, so using more than one phase is not an option.

Please see pictures attached.

Bonus info.
1 - Phase.
2 - Zero
Ground

No, its a single phase connection, 1 cb for the hob 1 cb for the oven. i work with 3 phase each day.

dont always assume, you been in UK again?

Are they both on the same phase? In the UK they would be, here probaby not.

Elgg, I think you might need a tri-phase installed.
Unfortunately everything here in CH, must be carried out by an electrician, because none of the insurances cover any personal household enhancements and/or work.

doubt it, the oven is a single phase appliance, unless he plans to buy a new unit 3 phase will not help.

I dont really understand the concern though, install the oven and use it, if it trips all the time then fair enough have a larger CB put in and wiring checked as required.

install and get on with it.

Yep......could not have said it better.

I will replace the 1.5 mm2 wire with the correct one i.e. 2.5 mm2 and replace the 10 A cb with a 16 A ditto.

Elgg the others have given great advise re the way to have it installed but as Sky states, armed with all this knowledge get an over priced man to come and wire it up. If anything were to go pear shaped you would have rather a large bill. Although I cant see why we have to pay so called qualified electricians. I have dual phase and had a single phase oven installed. The electrician told me it was risky, and recommended additional work, which I declined and the oven is still working after 6 years.

Maybe, depends if it connected between the two phases, or had two elements, each connected across a different phase and neutral.

(P.S. I see that the Norwegian versions is across two phases)

Tom

Acoording to that, it CAN be connected to two phases, but only in Norway!

Of course, there are also two phase wires coming from the block, so those COULD be separated and then run on two separate phases (which is what I would do if I only had 10A circuits).

In any case, 3700W/230V=16A.

(voltage here is 230, not 220, as is clearly stated on your device)

Tom

Nope, if a fire starts the insurance company will only cover damages if the appliance has been installed by a professional. Even if the OP is a professional (and I'm pretty sure he is), you've got to be a certified electrician.

Insurance in CH generally just pays out with very few questions asked. If there was a fire then there is a good chance that any invoice you got for the work will have been destroyed. I doubt it would dawn on the insurance that someone might fix it themselves.

FWIW I know an instalation where pros's in ZH used the wrong thickness cables, at a control 5 years later they needed to be replaced, even with the thicher cables the trips were reduced from 32A to 24A per circuit. Quite a pain as 24A was borderline & often tripped out.

The ratings on that oven are for a single phase appliance drawing up to 16 A from the mains. It should not be connected to Swiss electrical outlets which are rated at 10 A only. Replacing the fuse / circuit breaker is not sufficient as the wiring between the circuit breaker and the socket outlet is not rated at 16 A.

Well, I've got a 3P16A circuit in my kitchen, as well as a 3P10A circuit, but my stove runs on the 10 circuit, and I use the three 16A circuits to run my server, freezer, fridges, and various electrical devices (and thus no longer trip the 10A breaker that was the only circuit in the kitchen before).

Tom