what is the difference between 63A and 80A RCCB's? is one just capable of taking more power through it?
if i have a 100A main incomer with 2 63A rccb (17th Ed) is it safe to swap one of them to an 80A?
my 63A RCCB has broken and i have a spare 80A in box (like you do!). just want to make sure it is ok and safe before i get someone out and potential waste their time and my money.