Hi plugwash. I did what you recommended and the shower and RCCB now work perfectly. Thank you very much indeed for your help.
I'll get Swalec in asap to uprate the supply/main fuse and ask their advice on upgrading the CU and testing the system.
Once again thank you very much.
I'll get Swalec in asap to uprate the supply/main fuse and ask their advice on upgrading the CU and testing the system.
Once again thank you very much.