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Hi all

I’m planning to install a consumer unit in my garage. The unit will eventually power a 32amp hot tub, 2 double sockets and a small lighting circuit.
The distance from the house CU to garage CU will be about 10m. I plan to run single cables through 20mm steel conduit under my concrete drive once I cut a channel which will exit in the garage.

1. Is it advisable to run singles or T&E through the 20mm conduit?

2. What size cable is preferable (10mm)?

3. What size RCD/ RCBO should I use in the house CU to supple the garage consumer unit (50amp)?

I am an ex electrician who has been a naval engineer for 12 years now so I’m confident I can complete the work myself. Any advise/ comments on my 3 questions would be really helpful. Thanks
 
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