I am installing a Mira Sport 10.8 KW on 10mm cable. At 230V this pulls almost 47 amps, by my reckoning.
Mira have told me that I should use an RCD and an MCB in the CU. They have told me that this is better than an RCBO as if one fails it can be replaced.
Can anyone tell me what type (ampage and rating) RCD and MCB I should use? I guess that a 50A 30ma MCB and 50A RCD are the correct bits to get?
Also, I need to run the cable from the CU to the ceiling, then through the old lath and plaster ceiling and through the floor space to the bathroom. I don't need to chase the wall as the cu is boxed in and the box comes to the ceiling but do I need to put the 10mm cable in any sort of conduit where it passes through the roof?
I am getting an electrician to do the actual connection to the CU but I want to save money by getting all the bits in place first.
Thanks!
Mira have told me that I should use an RCD and an MCB in the CU. They have told me that this is better than an RCBO as if one fails it can be replaced.
Can anyone tell me what type (ampage and rating) RCD and MCB I should use? I guess that a 50A 30ma MCB and 50A RCD are the correct bits to get?
Also, I need to run the cable from the CU to the ceiling, then through the old lath and plaster ceiling and through the floor space to the bathroom. I don't need to chase the wall as the cu is boxed in and the box comes to the ceiling but do I need to put the 10mm cable in any sort of conduit where it passes through the roof?
I am getting an electrician to do the actual connection to the CU but I want to save money by getting all the bits in place first.
Thanks!