Winston1 is once again posting poor information / advice
Adding a hob ( or job ? ) may require an MCB with a higher current rating. The higher rated MCB may require a higher rated cable.
Cable for 32a / 6.3KW double oven
- Thread starter Sard
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Winston1 is once again posting poor information / advice
Adding a hob ( or job ? ) may require an MCB with a higher current rating. The higher rated MCB may require a higher rated cable.
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That's extremely unlikely.
People are so used to arguing with Winston that they now also do it when he is right.
Post-truth politics enter the electrical world.
People are so used to arguing with Winston that they now also do it when he is right.
Post-truth politics enter the electrical world.
He stated that adding a hob will not affect the cable size.
Adding a hob onto the existing cable may not be possible if the current rating and voltage drop of the existing cable would be exceeded by the combined loads of oven and hob. What happens then ?
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So - you are saying that a 32A circuit must always be installed with 6mm² cable.
No I am not..
What I am saying is that if there is a foreseeable possibility that the circuit will need at sometime to be upgraded to 45 Amp ( by adding the load of an electric hob ) then installing a 6mm² cable would be sensible planning ahead.
Indeed. It was only at the last gasp that the full scenario was revealed.
Ok.
There isn't. It would have to be more than 19kW.
6mm² was not traditionally used for sensible planning ahead; it was used because of the 30A BS3036 rewireable fuse requiring it.
As I wrote in my recent 'afterthought', that really depends upon installation method and any de-rating factors.
If one has 4mm² T+E installed by Method C and with no de-rating factors (hence CCC=32A) protected by a 32A MCB/RCBO, then, using the standard diversity calculation for cooking appliances, that would be good for a cooking appliance load up to 83.3 A (about 19.2 kW at 230V) - far more than any credible domestic cooker, either now in the future.
Kind Regards, John
OK but no need for a separate circuit. As has been proven above it can go on the same circuit as the oven using 4mm2 cable and a 32 a MCB.
If the op has an existing “cooker circuit” then a second circuit may not be necessary.
Sometimes the layout of the appliances may mean that separate circuits are a better option.
Sometimes the layout of the appliances may mean that separate circuits are a better option.
I don't think DP switches come in 32 amp rating so you would use a 45 amp one. Get one without a neon as neons go black and waste around £25 of electricity a year. You can wire the oven straight to the switch if you like but most people like a connection unit.
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That is wrong. The MCB is sized in relation to the load and does not change.
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