Hi, hoping there are some electricians here that can help.
We are building an extension to the rear of our house.
Existing consumer unit was replaced roughly 8 years ago, with an MK split unit, RCD for sockets and non-RCD for lights, and new thicker tails from the main fuse. It's pretty much full mcb-wise - not enough capacity for the extension anyway, as we'd like a second cooker down there - just like Ed
Main electric board fuse is still 100A.
The house is an L shaped bungalow with an attached garage, so the extension-to-incoming-mains distance is a good 20 metres-plus through/under/over the house to the extension.
My electrician (who fitted the existing unit) is now retired/AWOL so I'm going to have to 'get quotes'.
I'd like to stick with MK as its a decent known brand.
What I would like to ask for is....
Keeping the existing consumer unit in place.
Teeing off the main fuse with new tails to a small consumer unit with 100A switch and one 50A mcb, probably with RCD capability.
Then feeding from that 50A mcb a single thick cable to the extension, where that 50A supply would go into another consumer unit.
That final consumer unit in the extension would then have enough mcbs to safely supply a small ring main, lights, dishwasher/fridge circuit, and a 13A electric cooker. It would all be RCD protected back at that 50A rated consumer unit near the main fuse.
This way only one (large) cable needs to be run the 20 or so metres from main fuse area to extension, instead of a whole load of lighting/sockets/cooker cables all bunched together.
My questions are
- is this acceptable regs-wise?
- am I asking for the right set-up?
- is there a better way?
Many thanks in advance for any assistance
We are building an extension to the rear of our house.
Existing consumer unit was replaced roughly 8 years ago, with an MK split unit, RCD for sockets and non-RCD for lights, and new thicker tails from the main fuse. It's pretty much full mcb-wise - not enough capacity for the extension anyway, as we'd like a second cooker down there - just like Ed
Main electric board fuse is still 100A.
The house is an L shaped bungalow with an attached garage, so the extension-to-incoming-mains distance is a good 20 metres-plus through/under/over the house to the extension.
My electrician (who fitted the existing unit) is now retired/AWOL so I'm going to have to 'get quotes'.
I'd like to stick with MK as its a decent known brand.
What I would like to ask for is....
Keeping the existing consumer unit in place.
Teeing off the main fuse with new tails to a small consumer unit with 100A switch and one 50A mcb, probably with RCD capability.
Then feeding from that 50A mcb a single thick cable to the extension, where that 50A supply would go into another consumer unit.
That final consumer unit in the extension would then have enough mcbs to safely supply a small ring main, lights, dishwasher/fridge circuit, and a 13A electric cooker. It would all be RCD protected back at that 50A rated consumer unit near the main fuse.
This way only one (large) cable needs to be run the 20 or so metres from main fuse area to extension, instead of a whole load of lighting/sockets/cooker cables all bunched together.
My questions are
- is this acceptable regs-wise?
- am I asking for the right set-up?
- is there a better way?
Many thanks in advance for any assistance