Hi Steve,
Welcome to ECN, first off. [Linked Image]
The Standards currently used here are AS/NZS 3000.
There are also other Standards that you should read.
That is for any general place, there are additional Standards for things like Domestic places and Cables to be installed in them places.
{Message edited to remove union reference}

[This message has been edited by Trumpy (edited 12-31-2006).]