Earth bonds on a TT system.?

Question

Can the conductors to the gas and water be left with a csa of 6mm and also electrode conductor be left at 6mm . no cables go underground and are in capping in walls. consumer unit has 100mA rcd with split load 30mA rcd for sockets

Answer 1

Should be ok with 6mm in a domestic installation but if you can replace with 10mm then do so.

Answer 2

think 6mm is okay but cant find my book.

why do you want to know?

if in doubt get a qualified electrician, part p regulations introduced in the last year mean you should seek the advice of a qualifed engineer.