Furthering what I said above, 3 phase breakers and 600-volt rated equipment, like meter sockets and panels, is considerably more expensive than our typical "residential grade" stuff.
Why is that? You won't find a single-phase main switch here. Also, there is no such thing as 3-phase panels, as the panel is completly passive. (It's just a plastic box)
A 3-phase breaker carries about the same price as a single-phase breaker.
Here you sometimes see "over-rated" switches: E.g. the switch for the washing-machine in my house is marked 400/690V rather than 230/400V. Some electric motors sold at the sheds are also marked 400/690V. Does anybody know where this system is used?
