I am considering whether or not to get power installed to my garage, as it is a hassle running an extension lead from the house any time I want to do some work involving power tools. It would also mean that I can have LIGHT, and a wired security alarm in the garage too.
After reading this: http://www.ess.govt.nz/rules/pdf/ecp51v18.pdf to get an idea of legal requirements for home wiring, I have a few questions for those who are current/former/retired electricians. (A quote I got a few years back from an electrician was too expensive for what I can afford, which is why I'm considering doing as much of the work myself as I can legally do).
1) Is running a mains cable overhead between a house and a garage legal (assuming it is properly protected by conduit etc)? The code of practice only mentions underground cabling.
2) As all new wiring requires an RCD, will an RCD be required at BOTH the main switchboard, and the submain switchboard in the garage, or is just one needed? If just one, which switchboard does it need to be on?
Thanks in advance.