Hi guys, would appreciate some comments on what others would consider best option in the following circumstance.....
Customer wants a shower circuit running from existing CU.......the circuit itself isnt the problem, its how best to suplly it. Currently installed is an old (80's??) wylex metalclad CU with the pushbutton 3871 mcb's in (yuk) and with a 63A RCCB main switch upfront of it all.
I did think about installing one of those push-in 50A Wylex 60898 mcb's in it for the new circuit but my concerns would be that im getting close to the 63A rating of the RCCB considering that there is a 40A cooker circuit and a couple of rings already existing. Id be worried the RCCB might not even still meet trip times aswell (how reliable were these type after years?) and really this board is well out of date but the customer is typical 'as cheap as possible' so changing the entire CU is a last resort thing to them.
Other option would be split the tails and install a seperate shower CU with its own RCD and breaker in it but to me this seems like dead money when a new CU would sort the lot.
Regards
Customer wants a shower circuit running from existing CU.......the circuit itself isnt the problem, its how best to suplly it. Currently installed is an old (80's??) wylex metalclad CU with the pushbutton 3871 mcb's in (yuk) and with a 63A RCCB main switch upfront of it all.
I did think about installing one of those push-in 50A Wylex 60898 mcb's in it for the new circuit but my concerns would be that im getting close to the 63A rating of the RCCB considering that there is a 40A cooker circuit and a couple of rings already existing. Id be worried the RCCB might not even still meet trip times aswell (how reliable were these type after years?) and really this board is well out of date but the customer is typical 'as cheap as possible' so changing the entire CU is a last resort thing to them.
Other option would be split the tails and install a seperate shower CU with its own RCD and breaker in it but to me this seems like dead money when a new CU would sort the lot.
Regards