[Al Skierkiewicz]

Hello all,
The name you are searching for is "slip rings" and they are available from many sources like McMaster and other vendors. They are not cheap but do provide constant electrical contact while spinning a full 360 degrees. They only became legal devices last year so double check through the Q&A and parts usage flowchart before using.
As to feeding the motor on a lift... There are a few ways to do this depending on the operating design of the lift. If it is a simple elevator (i.e. sliding parts going straight up and down) then wiring can be attached on the side with surgical tubing used to keep it out of the way during operation and to manage it when the elevator is retracted. A cable reel can also be used but it adds weight. A simple drum can be used that is attached to part of the lift. You measure how much wire you are going to need and add a few feet. Then you fold the wire in half and attach the fold to a rotating drum that contains a spring return. Then wind both ends of the wire onto the drum in parallel and attach to speed controller and motor. As the lift rises (and the drum with it) wire is payed out in both directions. When the lift falls, the spring rewinds the drum and the wire. It adds some weight but not as much as the cable reel. Again check the appropriate sources to make sure the reel is legal.