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Craig
Craig, Electrical Technician
Category: Electrical
Satisfied Customers: 4529
Experience:  33 years experience electrical troubleshooting industrial equipment and control systems.
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how to wire a 1 hp single phase 120 volt baldor motor when

Customer Question

how to wire a 1 hp single phase 120 volt baldor motor when i wire up a 1hp sigle phase baldor i conect the 135 and 248 together the motor runs but starts getting hot and smoking after a while
Submitted: 3 years ago.
Category: Electrical
Expert:  electrifier replied 3 years ago.

electrifier :

What voltage are you trying to wire it for?

electrifier :

Do you have a wiring diagram anywhere on the cover or on the motor ID tag?

Customer :

120 volts is another way to wire it other than tieing the 135 and 248 together and then wiring each one of those to a hot and common ..

Customer :

u think maybe it has a start and then run windings ?

Customer :

the diagram is worn bit it has a low voltage and i beleive the other might say high voltage.

electrifier :

That is normal. Are you trying to wire it for 120 volts?

electrifier :

What does the diagram say for low voltage for connections? Are you sure it's #8 and not #6? How many total wires are there in the motor junction box?

Customer :

theres 6 total there is a number 1,2,3,4,5,8 the wire diagram is wore off

electrifier :

Was the motor wired for anything when you got it?

electrifier :

Do you have a # XXXXX the baldor motor?

Expert:  Craig replied 3 years ago.
I believe I know what 's wrong here. I think you actually have 240 volts coming in and the motor is wired for 120 volts. That's why it gets hot and smokes. Check incoming power and verify 240 volts. Then change motor connection to this:

Li- #1
L2- # XXXXX & 5
join- #2-3 8
this is for CCW rotation, to reverse, join 2-3-5 and L2 is #4-8

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