Our house had three phase power when we moved in - it was separate flats upstairs and down so had two ovens. We've since had the meters merged (maybe "amalgamated") and second oven removed. When finishing off the meter merging, the network line guy removed a "pole fuse" (I think?), as he said we had no need for three phase power. I didn't think much of this at the time.
I am now refitting the garage and the (professionally qualified and suitably licensed/certified) electrician is coming in a couple of weeks to do the wiring. I've seen a couple of tools that use three phase power that I am currently lusting after and one day may actually be able to afford (once I've paid for the garage) - a big table saw induction motor and a welder.
So I can talk to the (professionally qualified and suitably licensed/certified) electrician on a somewhat informed basis, I have a few queries:
- Is three phase wiring different to ordinary wiring? Oven sockets are often different to ordinary sockets, but thought that was a 15 amp circuit?
- Does three phase power cost any more than single phase power? I assume you typically use more power if you're using bigger tools, but do you need to go on a commercial plan or similar to get it?
- A separate set of breakers in the garage seems like a passably good idea, but no idea if that is actually worthwhile or not. Thoughts?
- Anything else you wish you had done when you were wiring your garage?
I'm planning on lining the garage once the wiring is in, but will be using ply and screws so I can remove the linings if/when necessary. It's not the end of the world if I miss something now, but would obviously prefer to do it once, properly.
Hopefully it is clear that my knowledge of mains electricity is limited, though sufficient to be afraid of it (voiding insurance if nothing else). I do enjoy electroBOOM's antics (that I am pretty sure are staged anyway), but I have zero desire to emulate them and all work will actually be done by professionally qualified and suitably licensed/certified electricians. Really just after some base knowledge so that I don't ask them to do (or not do) something I will regret later.