Post
by sparx »
Fri Oct 02, 2009 8:16 pm
Hi, you mention TN-S so was the main earth on the supply cable metal outer sheath, & is this the clamp you refer to?
3 pieces of wire? it should be a 16mm2 between board and M.E.Terminal.
More Info Please, I'm curious
BTW when I do an inspection/test I always fill in on front sheet first:
Ze/PFC main earth size, main bonding size and confirm connected otherwise all other readings are meaningless and a waste of time as you are about to have to redo all IR's (which should be done with CPC's connected to earth bar), all Zs's will change after fixing faulty main bond.
Is this in town/city or country area? if there are overhead lines around I have found underground service to house with earth on cable sheath, but other end went up pole and L&N connected but sheath turned back and not connected!
First thing is to confirm TN-S system, make sure continuity of main earth between board and intake position, is it same looking cable each end or has there been a joint, it should be easy since only allowed 3 metres long!
Once happy with this then it is the owners responsibility to contact REC about condition of their connection to their cable, which they are not obliged to provide, you may end up having to request TN-C-S or go T.T.
Presume you are doing PIR, if so you need to stop now and get the fault fixed first, this should have been covered when you did your 2391-10 inspection & test course.
Ensure you have 'Professional Indemnity' cover with your P.L. insurence if doing I&T's, as you are giving a professional opinion as to the safe condition of the property!
regards SPARX