An earth rod could, in theory, be an issue on TNCS / PME supplies if there's a bad connection on the combined neutral/earth conductor, as the neutral current would try to return to the substation via the earth rods and earth, potentially raising the earth /neutral voltage to a dangerous level, and creating dangerous voltage gradients on the ground around the rods.AE-NMidlands wrote: ↑Sat May 14, 2022 6:21 pmLucky man! How do we find these people?
More to the point, why isn't/wasn't extra earthing always a desirable thing in any circumstances? Can anyone imagine a situation when it could cause a problem?
When we get such dramatic about-turns it makes me suspect that the experts always knew what was needed, but were stitched up by people on committees who were only there to represent vested interests. The changes in building regs or fire safety approvals which lead up to the awful fire in Grenfell Tower are a case in point.
A
Here in west Wales they went through a phase of using aluminium crimps on the copper cables on overhead supplies: every now and then i have to call WPD out when i find a dodgy neutral or earth - but so far this has always been on TNS supplies.