not introduce an earth potential and to main bond the internal copper pipe work of a property[...] a building, then this pipework may be in touch [...]
for supplying IT equipment and twin and earth (T&E) wired ringmains. At present we install with twin & earth cable, dual earth socket outlets, and use two protective conductors terminated
will not do an earth loop impedance test. I am also getting a reading of 50Hz at the main incoming[...] not be damaged if it should be 50Hz? Would this have an effect on the earth loop impedance readings