ECN Forum Forums General Topics of the Trade General Discussion Area 4pdt switch for reversing motor

does anyone know where i can find a schematic for wiring a single phase, 120v rvsing motor using a 4pole, dbl throw toggle?

Basically you just swap the orange and black wire on most of the motors I see.

Use the standard cross connect method on the DPDT sw.



Furnas has a lot of diagrams for doing this with their drum switches and various motors.
See page 5
http://gfretwell.com/electrical/Catalog%204258%20Drum%20Controllers.pdf

I've even worked with three-position double-throw switches -- as toggles.

Forward - off - reverse.

Is this a gear-motor?

That is what the drum switches are good for. We have thousands of them here on boat lifts. They use the garden variety 6 lead induction motor in the top left of figure 1 of the Furnas diagrams I referenced. Those are dual voltage, reversible.

yes, it's a 3pos switch, fwd/off/rvs 4 pole (12 terminal) dbl throw switch. 6 leads coming from motor. boss wants me to use this switch. haven't had much luck looking for a schematic online..?

Does this help?

This is how the drum switch does it.



I have never seen it done with 4pDT but if you see the connections necessary we should be able to figure it out.

Try this.

Someone check my logic, it is late

120v wired 6 wire motor

My style is to bring L1,L2 to the center, common connections. In the center off position the voltage goes no further.

Then Fwd/Reverse use mirrored connections... with either the Run or Start leads flopped.

But that's not the only way to skin a rabbit.

BTW, with my scheme you don't need so many poles.

I was just going for no power ti the motor when it was "off". I see where you could do a couple of different solutions to this puzzle.

The real answer is a drum switch IMHO. They are definitely motor rated and pretty robust. Like I said up thread, we have thousands of them down here on boat lifts. That is why I knew about the black and orange wire thing ;-)

I agree Tesla
I redrew the picture to make it easier to see.
You could eliminate the top set of contacts as long as this is a Line/Neutral motor. (wired 120v)