Dapo,
Regarding your earlier question about the availability of the NZ Regs, On-line,
yes, they are.
Go to www.ess.govt.nz/rules/rules_acts.asp
I think you should find what you are after there, but, bear in mind that some of these are PDF files and also, that there may be little mention of RCD's,but, I could also be wrong too!.
Hope this helps!. [Linked Image]