tt earthing

I currently have a bond to the MET on my gas pipe, as per gas regs. There is no bonding on the rising main, which comes in in MDPE before switching to copper at the stop valve. The pipes at the boiler are cross-bonded. I have a TT installation with an earth rod, a Wylex NS consumer unit, and a...

Evening all, just a quick question, I've been looking at this subject quite a bit now can anybody give me some hard evidence requarding exporting a earth to a out building, I've heard so many diffrent things like you shouldn't connect a pme earth to a outbuilding earthing terminal and all sorts...

Just wondering what BS7671 says about fixed sockets being RCD protected when being fed from a portable UPS (i.e. removable rack type UPS) when the the UPS is operating on battery mode and the Line & Neutral conductors are isolated from Earth. (Effectively a Isolated Terra based earthing system.)...