This is my attempt to answer one of the questions about the circuit of this switch. My diagram is pretty mundane, but hopefully it shows which terminals are connected for each of the 3 switch positions. I use this switch for my house to choose between Edison power and my standby generator. This is an interrupt before the close switch, so it's perfectly acceptable for this use. I use 3 clamps for hot-neutral-hot in one phase 220V. But you can also use it for three hotspots in three phases. The best thing about this switch is also the worst, that's the only reason I didn't give it 5 stars. This is what Nathan stated in his review: The case is EXTREMELY compact. It looks great on my garage wall, but it's hell to hook up all those 6 or 8 GA wires and stick them in the box. I couldn't do this with existing perforations. I had to cut additional larger holes. Otherwise a great switch.
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