Thinking of installing an electric shower in my bro's house. CU is very old so i will be replacing it with a split load cu but there is one thing i'm unsure about. The 'leccy meter has 40A max written on it - surely this isn't max load for the house? (Thought it would be at least 60A these days?)It is a very old meter so nothing would suprise me. If it max load, then i guess it will have to be changed, put outside, house re-wired, £1000's spent, job abandoned! Any thoughts?