I have an older 90 ft Triex Sky Needle that I have been working on. I'm down to the wiring of the raising/lowering motor. Because of the long distance, I ran four conductors (250 ft) of #10 wire. The
I don't know anything about the control box, but I know a lot about power wiring that might help you think through the schematic. Think of the power source as a center-tapped transformer with the neu
On 2013-11-04 22:48, Ray Benny wrote: I have an older 90 ft Triex Sky Needle that I have been working on. I'm down to the wiring of the raising/lowering motor. Because of the long distance, I ran fou
Another alternative is the Home Depot 6/4 aluminum cable, when I bought 165' for a 50amp construction drop they called it "hot tub wire". About a buck a foot, so more ampacity than #10 Cu at lower co
Grant KZ1W The problem with the US Tower motor is that it draws 20A plus a surge when you start and the relays drop out if you get much below 120V. "Ampacity" refers to what the wire can carry withou
A 10 volt filament transformer can be wired autotransformer style to pre-compensate for the Cu drop. -Mike _______________________________________________ ____________________________________________
Im not sure of this, but the motor must be a seriously lagging current load. I wonder if some power factor correcting caps would get the sluggish motor going. With the lagging PF, you get the most dr
You are correct that ampacity is a maximum current rating. #6 Al is 0.81 ohms/kft and #10 Cu is 1.29 ohms/kft so there is a substantial difference in DC resistance indicated by the ampacity ratings (
That's a very clever idea that might work; you would have to try it. The excess voltage might increase stress on some of the components, mainly the motor. I should mention that my power voltage alrea
I view a stalled motor as being similar to a transformer with the secondary shorted. The current will be limited only by the winding resistances and the leakage reactances. Surprisingly, the PF is