OP
Engineer54
all double dutch to me i'm afraid - what should it be? and is that why he said it is an undersized earthing conductor and quoted for replacing it?
4 mm is the correct minimum size conductor for an earth rod, the real problem with the rod on this PIR is the Ra (Ze) value!! It is extremely unlikely the electrician obtained a value of 0.22 ohm, not unless you have a decent sized ground matt in your back garden!! How long did this PIR take the electrician to complete?? I'm sure that the electricians here that conduct these PIR tests/reports on a day to day basis can tell you how long it should of taken him, to have been able to undertake correctly....