Electric motor connection diagram

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Forum topic by brucenjen posted 10-08-2014 02:31 PM 940 views 0 times favorited 5 replies Add to Favorites Watch
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6 posts in 749 days

10-08-2014 02:31 PM

Topic tags/keywords: bandsaw jointer plane question resource electrical motor

I have a 1 ½ hp, 4 pole single phase, 1720 rpm, 115/230 volt motor. I am attempting to wire the motor for 115 volt. I set the continuity tester on 2,000 ohms. When the leads were placed together the reading was 0.

The attached pic is the plate on the motor.

Readings between the following wires.
Black White 1 Red Yellow 1 2 Grey = capacitor
White Red 1 Black Red 0
White Yellow 0 Black Yellow 1

Assuming that:
Black 1, White 2, Red 3, Yellow 4

This may reflect the correct wiring on that motor’s plate, but what about the capacitor?
L1 L2
1-3 2-4
Black Red White Yellow

What do I do with the capacitor? The motor has three placed to connect wires:

1 3 2-4
Black Red White Yellow
Grey Grey

Ok? If the motor needs to be reversed:

1-3 4 2
Black Red Yellow White Grey Grey

Any help would be appreciated.
Should perk up the bandsaw.

5 replies so far

View dozer57's profile


92 posts in 921 days

#1 posted 10-08-2014 02:40 PM

Bruce your on the right track, wire it as the diagram shows. The gray wires are the starting winding with a cap for extra tork for start up. put one gray wire one each line.

View REO's profile


883 posts in 1496 days

#2 posted 10-09-2014 01:28 AM

provide a picture of the connection area.

View brucenjen's profile


6 posts in 749 days

#3 posted 10-09-2014 02:35 AM

Here it is with: Line 1: black (1)/grey – red(3)/grey >>> White(2)-Yellow(4)
My numbers are based on my limited understanding of using a continuity tester.

View OldWrangler's profile


731 posts in 1017 days

#4 posted 10-09-2014 09:45 AM

This is how all my replacement motors have looked and you are right about the wiring. It’s not rocket science just standard 110/115 connecting. I think you have it figured out.

-- I am going to go stand outside so if anyone asks about me, tell them I'M OUTSTANDING!

View brucenjen's profile


6 posts in 749 days

#5 posted 10-09-2014 02:40 PM

Thanks for the help.

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