Went to a house to extend a circuit and upon doing the minor works I couldn't figure the earthing system. There was no DNO cutout and L and N came from overhead powerlines. I followed the main earth cable down and it went half a foot below the consumer unit to a connector block with 3 small, maybe 2.5 earth singles which disappeared behind the wall. The Ze (from said main earth) was 0.33. PFC though was 14A? That doesn't make sense giving that 230/0.33 = 0.7Ka
Any thoughts?
Any thoughts?