Paul,
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As I understand from what Mike (Trumpy) has said in the past, all services in New Zealand are wired as TN-C-S (or what you might call the PEN system in Europe).
Thanks for that mate. [Linked Image]
Yeah,
As far as to the Main Switchboard is concerned, we have the MEN (Multiple Earthed Neutral), where the Neutral is Earthed at the Xformer and at the Installation end.
(That's where Inspection ends)
However, some Sub-Mains here can use some pretty wierd set-ups, especially out in the more rural areas that have probably never seen an Electrician in 50 or more years.
I've learned to expect the absolute worst in places like this.
If I'd had a digital camera about 5-10 years ago, there would be a seperate Non-US Violations Area here.
I'm not joking!. [Linked Image]