I am a qualified maintenance electrician working in the natural gas industry, as such I have some specific training in electrical installations in explosive atmospheres. Just finished my HNC in Electrical Engineering and now looking to climb the ladder in my organisation.
My question is - I have an installation I maintain and the DNO have recently changed their pole transformer. Since this change I have been unable to do earth loop tests. The installation is a TT system with one earth rod. For some reason I get 186V L-E and 66V N-E and 252V L-N at the cut out fuse.
I disconnected and measured against the rod only. All circuits were off via the main switch.
Any ideas?
TIA, SJE392
My question is - I have an installation I maintain and the DNO have recently changed their pole transformer. Since this change I have been unable to do earth loop tests. The installation is a TT system with one earth rod. For some reason I get 186V L-E and 66V N-E and 252V L-N at the cut out fuse.
I disconnected and measured against the rod only. All circuits were off via the main switch.
Any ideas?
TIA, SJE392
