Isn't most if not all of the power 3 phase in the UK it was in Germany
The power supply to the street is 440v three-phase, which is what industrial equipment used by businesses runs on. But houses only get half that - literally the houses on one side of the street take one leg of the supply, and those on the other side take the other leg - or so I understand it
American junction boxes don't have terminal strips in them, at least I have never seen one with a terminal strip. I think wiring would probably be easier than wire nuts.
Doesn't the UK use very high amperage circuits and then each item has its own fuse or breaker? Here in the USA we use smaller circuits and depend on the breakers at the main box to trip if a circuit is overloaded.
I've no idea how amperages compare; here is a typical UK fuse box (or 'consumer unit', as they are called):
10-way, 16-module high integrity, insulated consumer unit with a smooth profile and flexible busbar. BS EN 60439-3.
100A Main Switch
2 x 63A RCDs
10 x MCBs (3 x 6A
2 X 16A
4 x 32A
1 x 40A)
10-Way (5+7+7 Way)
The two RCD (earth leakage trips) will be for the kitchen (and any outside supply) and the bathroom (ie. electric shower), because the law says you have to have RCDs wherever there is water in the vicinity to an electrical supply.
The two 16A breakers will be the lighting circuits (upstairs and downstairs), and the four 32A breakers will be for various ring mains (ie, outlet socket circuits). Not sure what the 40A breaker will be for - probably an immersion water heater supply.http://www.screwfix.com/p/bg-10-way-high-integrity-populated-insulated-consumer-unit-dual-63a-rcd/72088#
My bus incidentally has one of these (this exact model as it happens) - A three circuit consumer unit intended for sheds/garages/outbuildings:
IP55. 5-module plastic, garage kit enclosure with a neutral cable and flexible busbar.
1 x 40A 30mA RCD
2 x MCBs (1 x 6A
1 x 32A)http://www.screwfix.com/p/bg-garage-kit-enclosure-5-module-ip55-40a-rcd-dual-6a-32a-mcb/68849
Edit:- Brian was typing at the same time I was - what he says is correct. I've never heard of a house using the 440v supply for any 'domestic' equipment, but I'm sure it's doable in theory; certainly a friend of mine had a three-phase power supply installed at his home-based business to power the industrial sewing machines he uses. I also know that in certain fashionable circles (ie., mega-buck homes in London) it's de-rigur to have full restaurant-spec cookers etc in your home kitchen, which might well need a 3-phase supply