Single Phase 3 speed motor with no white wire(neutral)

Thread Starter

Ryan!

Joined Jun 12, 2018
3
I read about a thousand threads on wiring 3 speed motors but they all had a neutral wire.
I can make this motor run but I'm connecting the hot and neutral between the black yellow and blue combinations and not getting the correct speed changes. I would think that either the hot or the neutral is switched between the H,M,L. and the other is connected ....somewhere...I just don't know where. Thanks in advance. :D
IMG_20180612_150205356.jpg
 

dendad

Joined Feb 20, 2016
4,481
It could be RD or BN. And the connection may determine the motor direction.
Can you measure the resistance from BK to BN then BK to RD?
If they are both the same, I'd think it is as above, that is, a reversible motor.
It is just a guess really.
 

Thread Starter

Ryan!

Joined Jun 12, 2018
3
Ok I finally got the resistances.
I figured I just get em all. while I was at it :D
Red -> Brown =101 Ohms
Red -> Black =54 Ohms
Red -> Yellow =65 Ohms
Red -> Blue 76 Ohms
Black -> Brown 48 Ohms
Black -> Yellow 12 Ohms
Black -> Blue 24 Ohms
Brown-> Yellow 59 Ohms
Brown-> Blue 70 Ohms
Blue -> Yellow 13 Ohms
 

Thread Starter

Ryan!

Joined Jun 12, 2018
3
48 ohms vs 54 ohms.. close.
Success. I was able to get all three speeds and change direction by reversing the leads.
Thank you very much. :D
 
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