Had a bit of a brain freeze. Got to go and do an inspection on a property with 2 consumer units, the 2nd fed from the first on a 50A MCB.
Let's say theoretically I get 0.2 for the Ze on the main board, then 0.3 for the Zdb at the second board and 0.2 for R1+R2 on a ring final on a 32A MCB.
Is...