PSC Motor Wiring Help

[ookpik]

I have a Gould Century ½ HP permanent-split capacitor (PSC) motor that I am unsure how to properly connect. I used the motor years ago for a project and it worked fine however, when I put it away it appears that I not only mislaid the cover plate but also failed to properly label the leads. There are three leads, which are numbered as follows:

# 1 – Red

# 2 – Black

# 3 – White

How are the leads supposed to be connected in order to make the motor work? Direction is not import at this time.

Any help would be great appreciated!

 

[zmaxmotorsports]

Was that a multi speed motor by any chance?I would guess the white is common and the red is low speed ,black is high speed.

 

[ookpik]

To the best of memory this is a single speed motor or at least I used it as such.

I was able to find a wiring diagram that appears to match my motor however, without disassembling the motor is there any way to determine which lead is Common, Run and Start?

 

[MBfreak]

Yes.
Use an ordinary DVM set to ohms
C-R will be the lowest resistance
C-S will be a bit higher ( BUT may be exactly the same as C-R)
R-S will be the sum of C-R and C-S.
My guess is that applying Neutral to C and Phase to R will spin the motor in one direction.
Applying Neutral to C and Phase to S will spin the motor in the reverse direction.
Ie , electrically reversible.

But if there is a larger ( 10%?) difference in resistance between C-R and C-S it is a uniderectional motor ( to save some on copper)

Ola