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Electric motor

C

caterpillar guy

Well-known Member
I have a 2 horse electric motor I have the correct line 1 and the ground/neutral. I need the third wire for the 220 3 wire hook up. Some of the wires are not numbered or colored . All the wire coming out of the motor case are white and the same size /gage wire. There are some of the wires with a metal band and a number but not all of them and only a few. Problem is I don't find a number 4 and I find 2 number 1's. and only 1 number 8 wire.
The tag has gotten hard to read due to age. and with all the wires coming out with one color can't tell anything there either.
Motor part number is 6-334389-01 and frame is a 182T.
 
Sorry guys It is a Century electric, and the Part number I guess is for the motor since it is on the tag. There is no model number thoguh there is the frame number previously listed. Type is a CSF.
 
(quoted from post at 15:13:49 08/24/19) Sorry guys It is a Century electric, and the Part number I guess is for the motor since it is on the tag. There is no model number thoguh there is the frame number previously listed. Type is a CSF.
Click to expand...

"I have the correct line 1 and the ground/neutral."

Neutral wouldn't be used in "220" Volt motor, and "ground" would be likely to a green screw in the "frame".

So "L1" and "L2" is what you are concerned with.

Is the a "240 Volt only" motor or a 120/240 Volt motor?

Almost certainly has a "start" capacitor".

Does it have a "run capacitor"?

Does it have an internal overload protector?

How many leads in total are there in the "junction box"?

(IIRC, if it has an internal overload protector, there will be an "L1" lead and a "1" lead.)
 
(quoted from post at 12:22:07 08/24/19)Some of the wires are not numbered or colored .
Click to expand...

I have seen this in motors many years back. It "seems" like I remember something about sometimes having to crack open a motor to see where each wire went in order to find out what it does, but I simply cannot remember.

Right now, not even the numbers you mentioned are ringing any bells....although it "feels" like it should be.

Do you know what the motor was originally on? Part of a power tool, or HVAC system or fan? Air compressor? 1800 or 3600 RPM? Or multiple speeds??

I ask the above questions so that the information might help someone else with your question. Am afraid my mind is "Out To Lunch" for the rest of the night. Sorry.
 
You can ohm the wires to find the correct leads but it's been too long since I've done it to remember. Don't even remember where that particular book is but I'm sure Google can find you the formula. I do know start will read the highest ohm's. Seems like you add the runs.
 
This is a typical Century wiring diagram for a dual voltage, reversible motor.

But without all the wire labels, it's still going to be a challenge.

Connect what you can positively identify. Possibly with the process of elimination you can figure out the rest. But don't attempt a "quick test". If it's wrong, good chance it can smoke it instantly.

If you have another motor that can positively be read, you can use an ohm meter to track them down. Still not going to be easy.

If there is a cooperative motor shop near by they might be able to wire it for you.

PS: If you are wiring this 220v single phase, there is no neutral connection. Just 2 lines and a case ground (the green screw into the motor housing).

If this is a 3 phase motor, disregard the diagram.
Motor Wiring
 

Ground and neutral ARE NOT identical or the same .
Use a multi-meter to find the main windings , start wi sing , capacitor and start contacts .
 
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