[QUOTE-CavLancer]I'll have to dedicate and leave on a transformer which wastes energy. [/QUOTE]
You could simply have a stepped-down circuit that's only active when the user engages the dumbwaiter. You'd have to get a couple of relays for the transformer circuit, of course, but it won't be drawing power 24/7.
Alternatively, you *could* tap one leg of your electric supply... at least I *think* you could. Your plus have 3 conductors, right? If so, you should have 2 phase and 1 ground... I *think*. If I'm right (and PLEASE ask a professional!!) you'd only tap one phase and the ground.
Bear in mind I'm not an electrician - I know enough about the limitations of my understanding to hire / consult a professional in these cases.
...like when I wanted to run a 110V dust collector from the same switch that engages my shop's 220V table saw. I called in a licensed tech from the vendor to set it up. But that's me.
On a side note we used this exact same winch in our old warehouse. The landlord didn't install it properly and the wire would slide off the spool constantly. It was not at all appropriate for what we needed. It was slung from a dolly running along an I-Beam so that we could sling furniture from it, raise it from our loading dock to our storage on the second level, and then pull the contraption over the balcony lip, then lower the load onto the balcony floor. This winch needs to be hung in a fixed manner - there can't be any knuckles or pivots, so DON'T use shackles (like our idiot did). The winch body will torque around the spool when you start and stop it. And you'll need to make sure it's secure front to back (along the winch motor axis), otherwise you get the de-spooling problem we had.
EDIT: you'll also have to check the duty cycle and frequency. If your electric isn't 60Hz then it's going to run at a slower RPM (and less torque). This means that it'll take longer to move a load a given distance, which might impact your duty cycle limitations. Just some things to consider when engineering this.
EDIT2:
you might consider dropping your current plans for an automotive winch (12V) run off a car battery and re-charged from a dedicated solar collector. Advantage here is many RV supply houses carry this stuff so it's all off-the-shelf / plug & play style. Just a thought
