Knowing that sometimes the obvious answer is incorrect comes from experience. Because sometimes the "obvious" answer is not the correct one, even though it might be. When verification is so cheap and easy, and the background of a situation is unknown, why not verify?

 

We used to deploy these Slosyn motors. The cap being a phase.

 

We used to deploy these Slosyn motors. The cap being a phase.
View attachment 284821

Used those also, AC synchronous, they were designed to be ran fixed RPM from off of the mains frequency & voltage, 50hz/60hz.
The R/C provided a 90° phase shift.
On 60Hz the SS series ran at 72rpm

 

Knowing that sometimes the obvious answer is incorrect comes from experience. Because sometimes the "obvious" answer is not the correct one, even though it might be. When verification is so cheap and easy, and the background of a situation is unknown, why not verify?

A simple measurement from Black to Blue should confirm it by reading the sum of the windings, i.e. each in series.

 

A simple measurement from Black to Blue should confirm it by reading the sum of the windings, i.e. each in series.

That was exactly what I suggested in post #11. Several responses said otherwise.

 

You tend to muddy the waters a tad, talk of having to access all four winding ends etc. ??
When the DWG was obvious. and a simple reading clear it up.