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Re: Retracting power wiring ?
Jaine & Mark,
1) You can limit your motion (less than 360 degrees) such that you leave enough cable slack (with maybe a spring to keep it neatly retracted). Or, you can go to the expense of building or buying (if allowed) a 360 degree turntable assembly. Do a search on turntable displays for trade shows which have a wiper inside to carry power to the rotating turntable. Someone here even has a 30' Christmas tree that rotates via such a turntable device!
2) There is also "curly-cable" which is multiple conductor coil cord that could be used (again, if it's a legal part). Just ask at an industrial electrical place. Or get some coiled air hose and run your wires up the middle of that.
3) A poor-man's wire retractor might be the cord retractor from an old vacuum cleaner too.
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