240v won't cut it for the hydro miners, you need 3 phases 380-415v (10A on each phase), depending on your country specs, for anyone who doesn't know what 3-phase wiring is, you can't just use three wires coming from the same phase and assume the miner will work, most houses will likely run on a single phase setup, so it won't be easy to supply 3 phase appliances, it's easy to figure that out just by looking at the wires coming into your house if they are just 2 wires -- you get a single phase wiring, if they are 4 wires then you got 3 phase which again, is very unlikely.