Good evening everyone
I am busy renovating a house that we have recently purchased and as soon as I've fitted the underfloor heating and the floor has been screeded, I will be installing a new kitchen.
As part of the new installation, we are having 2 NEFF ovens, and an induction hob which will be installed on a central island.
I've had a look at the existing wiring and as far as I can tell, there is 10mm2 cable coming into the kitchen from the main consumer unit, which is in the garage. The way I've established this is to measure the full cable in the garage (approx 17mm x 9mm) and the live cable in the CCU (6mm diameter including the red insulation)
The cable run is about 25m from consumer unit to Kitchen and is laid on top of the joists in the loft.
My new appliances have the following ratings
Power Current
Oven 1 3600 15
Oven 2 3600 15
Hob 7200 30
Drawer 800 3
Total 15200 63
I've calculated diversity (10% total plus 30% of what's left) as 26 amps but I would rather not rely on this because at busy periods (Christmas etc) I imagine that the current draw will be towards the top end.
Currently, there is a 30amp MCB in the main control unit and I'd like to increase this assuming it's ok to do so.
But in the kitchen itself, I am trying to work out the best way to wire all these in.
Is it ok to install a second consumer unit (in cupboard above one of the ovens) and then put some smaller MCBs to split the load to each of the 2 ovens and hob.
To reduce the overall load, I will probably wire the warming drawer into the ring main rather than use the cooker circuit.
Assuming what I'm suggesting is not completely mad, what size cable would you recommend I use from the CU in the kitchen to each of the ovens and the hob.
And finally, I am going to lay the cable to the hob under the floor - should I use conduit, and if not, is the cable ok unprotected (it will be laid in the insulation layer) or could I use some armoured cable?
Sorry about all the questions - any help you can offer would be very much appreciated.
Cheers
Steve
I am busy renovating a house that we have recently purchased and as soon as I've fitted the underfloor heating and the floor has been screeded, I will be installing a new kitchen.
As part of the new installation, we are having 2 NEFF ovens, and an induction hob which will be installed on a central island.
I've had a look at the existing wiring and as far as I can tell, there is 10mm2 cable coming into the kitchen from the main consumer unit, which is in the garage. The way I've established this is to measure the full cable in the garage (approx 17mm x 9mm) and the live cable in the CCU (6mm diameter including the red insulation)
The cable run is about 25m from consumer unit to Kitchen and is laid on top of the joists in the loft.
My new appliances have the following ratings
Power Current
Oven 1 3600 15
Oven 2 3600 15
Hob 7200 30
Drawer 800 3
Total 15200 63
I've calculated diversity (10% total plus 30% of what's left) as 26 amps but I would rather not rely on this because at busy periods (Christmas etc) I imagine that the current draw will be towards the top end.
Currently, there is a 30amp MCB in the main control unit and I'd like to increase this assuming it's ok to do so.
But in the kitchen itself, I am trying to work out the best way to wire all these in.
Is it ok to install a second consumer unit (in cupboard above one of the ovens) and then put some smaller MCBs to split the load to each of the 2 ovens and hob.
To reduce the overall load, I will probably wire the warming drawer into the ring main rather than use the cooker circuit.
Assuming what I'm suggesting is not completely mad, what size cable would you recommend I use from the CU in the kitchen to each of the ovens and the hob.
And finally, I am going to lay the cable to the hob under the floor - should I use conduit, and if not, is the cable ok unprotected (it will be laid in the insulation layer) or could I use some armoured cable?
Sorry about all the questions - any help you can offer would be very much appreciated.
Cheers
Steve