Been having a discussion with my electrician on the best way to wire up a new oven and a combi oven/microwave and would appreciate some more input.
There is an existing cooker connection in 10mm t&e with a 32a MCB (and RCD protection).
The oven is 3.49kw and the combi is 3kw. Oven doesn't have a cable with in and the absolute max that fits in the connection is 2.5mm flex. The combi has a 1.5mm flex.
Now I believe the oven could be wired into a cooker switch and from there connected up to the 10mm cable maintaining the 32a MCB as it's a fixed loan appliance.
The combi however has the microwave which I don't believe to be fixed load, the cable size is also quite small at 1.5mm, so I'm not sure this would work in the same way.
So my options seem to be a dual outlet cooker plate connected to the 10mm t&e, then a cooker switch for each appliance and 2.5mm flex to oven and the 1.5mm flex to combi microwave. If I did this I could downgrade the MCB to 20a, I believe the diversity calc for cooking appliances is first 10a + 30% of the remainder, which is just over 15a. Would that be necessary or could I leave it at 32a?
Are there any better options that don't involve running another cable to the consumer unit?
There is an existing cooker connection in 10mm t&e with a 32a MCB (and RCD protection).
The oven is 3.49kw and the combi is 3kw. Oven doesn't have a cable with in and the absolute max that fits in the connection is 2.5mm flex. The combi has a 1.5mm flex.
Now I believe the oven could be wired into a cooker switch and from there connected up to the 10mm cable maintaining the 32a MCB as it's a fixed loan appliance.
The combi however has the microwave which I don't believe to be fixed load, the cable size is also quite small at 1.5mm, so I'm not sure this would work in the same way.
So my options seem to be a dual outlet cooker plate connected to the 10mm t&e, then a cooker switch for each appliance and 2.5mm flex to oven and the 1.5mm flex to combi microwave. If I did this I could downgrade the MCB to 20a, I believe the diversity calc for cooking appliances is first 10a + 30% of the remainder, which is just over 15a. Would that be necessary or could I leave it at 32a?
Are there any better options that don't involve running another cable to the consumer unit?
