I bought an old jointer from an auction. The maintenance guy that was there told me that it had been converted to 120v. I pulled the panel to wire it and found that there's no diagram or anything for how they did it. The three screws that my fingers are on were loose so I'm assuming they were used. Just looking to see if anyone has a guess at this. I'm assuming white leg on the first post and black on the second and the third is dead?
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
Tool wiring - 120v conversion
- Thread starter ikessky
- Start date
454ragtop
Well-known member
If I'm seeing what I think I'm seeing, it looks like that contactor has a 200-208 volt coil, and won't work on 115 volt.
454ragtop
Well-known member
3 hot legs and 208 volt coil usually equal 3 phase, I'd look at the motor tag before hooking anything up.
Motor plate shows 3 phase. I've got a four prong 240 plug in the garage. I'm no electrical engineer, but I'm assuming that what I'll need is a 4 wire plug with red, white, and black hooking up as the legs and then my green to the ground.
454ragtop
Well-known member
Yes that's correct. Didn't realize you had 3 phase power. Carry on.
On edit, 4 wire 240 volt isn't necessarily 3 phase, a lot of single phase 240 volt is 2 hot legs, a neutral, and a ground. This will not run 3 phase without a converter or VFD.
On edit, 4 wire 240 volt isn't necessarily 3 phase, a lot of single phase 240 volt is 2 hot legs, a neutral, and a ground. This will not run 3 phase without a converter or VFD.
Last edited:
Lassen Forge
Well-known member
No joke, if you hook it up to 208 and it has a 120 motor in it... Wheee!!! (make sure you have a video camera going and post the results!)
Seriously, unless you can get the maintenance guy to explain how they did what they did to make it 120, that picture (to my untrained eye) looks like it's still set up for 3ø 208.
Seriously, unless you can get the maintenance guy to explain how they did what they did to make it 120, that picture (to my untrained eye) looks like it's still set up for 3ø 208.
454ragtop
Well-known member
How many HP is the motor? On a jointer probably better off swapping the motor unless it's something strange.
kngelv
Well-known member
I miss those old starters with the heaters on them. Definitely not 120 nor single phase. Your home outlet is probably not three phase either.
James
James
454ragtop
Well-known member
Could there be a possibility that the motor itself was rewired to single phase and the maintenance guy misspoke about 120v?
Less than .001% I'd say....
Less than .001% I'd say....
Lol! Well that's that!
My FIL just showed me a converter that he had built for an old lathe in his shop. However, that was years and years ago. I'll have to hit up Google and eBay and see what I can find.