My uncle wants his property tested as theres a new tennant going to be moving in and just by looking at it i can see its only his sockets that have rcd protection, shower etc don't. What code does this go down as on test sheet and do they have to be changed so that all circuits are rcd protected. I know they obviously need to be on new builds etc just not sure how it works relating to older builds that were up to the regs at the time.