Can this be done

[SKY]

Hi

In a home installation there is a main board supplying the house with no spare ways - from another feed from the main incoming there is a small CU that supply's a shower (rcd with 40a mcb).

The small CU has a 63A main switch and has a spare way. Can the spare way be used to power a cooker??
So in total the small CU will have 2 40A mcbs running 2 very high power concumers with a 63a main switch?

Thanks in advance.

*electrical trainee currently halfway through the 2330 level 2*

 

[Hawk81]

can you not change the main switch from 63amp to an 100amp main switch. What size are the tails feeding this small board?

 

[Sintra]

What size of tails are supplying the 2nd cu?