In article , DoN. Nichols says...

Unfortunately -- the design of his motor and terminal board hide
the details of the winding from him -- and the numbers assigned on that
terminal board don't match the ones shown on the schematic which you
pointed to.

Correct. In most motors, if you want to reverse that way (using
the CT of the run windings) you need to do some digging.

Unless he really understands what's going on in there - that is,
can look at the wires inside, and map them in his mind to the
conceptual diagram on paper - he's going to have a tough time
achieving his goal.

Most folks who try to wire a drum switch up to a single phase
motor give up in frustration after a while, because they can't
just go red-to-red, black-to-black, and white-to-white the way
electricans 'wire' things. You can't rely on wire numbers,
colors, terminal board markings, etc when doing this.

Rules for this stuff a

1) make a diagram.

2) wire according to that diagram.

3) draw the best possible picture of it after you are done,
using the nomenclature for individual terminals and wires
that you yourself applied to project.

The diagram I gave him won't be a cure-all. The numbers won't
match his project. But if he can understand what's going
on in the diagram (the three pole, center off switch is drawn
quite clearly, that's what a drum switch looks like on paper)
then he has a chance of making his *own* diagram that suits
his purposes. Topologically, his and mine will be nearly
identical - possibly with the exception of the thermal cutout
switch. That adds one extra wire between drum switch and
motor. OTherwise you can do it with six.

Jim


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