Can anyone tell me the in regs wether or not a on a TT system with a 10mm main Earth (not buried) to the rod and consumer unit with a split load, if you need or when you need an overall protection of an RCD, or is the 30mA RCD on the sockets enough. I dont know, but could find out the Ze if required. It looks like in the OSG, that it does need the overall RCD but the regs say that sockets on a TT system need to be protected by an RCD.
Please enlighten me.
Please enlighten me.