Fusebox being fed by a ring main

[Guest55]

You could end up running the RFC at 32 amps constantly, a RFC is design with diversity in mine i.e. it will not run 32 amp all the time I have seen a RFC
installed to supply 3 heaters, T&E had over heated and gone brittle when I check current draw it was between 30 and 34 amps

cant believe this post hasnt been pulled........

2 x 2.5mm T&E legs combined is good for around 50A clipped direct so i dont see how
32A is going to trouble it in any way ?
and i guarantee if you were to test the cable to destruction it will probably carry double that before the insulation is toast.
absolutely no design issues arise when running a properly installed circuit to its max mcb rating , hence the cornerstone principle of In > or = to Ib.
diversity doesnt even come into it IMO.