I am not sure it needs 4 wires for three phase. I have zero experience with three phase, but based on my readings, the neutral leg is optional. Plus you have a separate ground already. https://en.wikipedia.org/wiki/Three-phase_electric_power#Three-wire_and_four-wire_circuits

 

If it were 3 phase, it would(should) have
four wires,3 current carrying conductors
and a ground. No neutral. Not sure
what’s going on there. I would have
expected one of those wires to be green
or green/yellow for ground. I’m assuming
it’s single phase and one of those wires
is ground. You’ll need to look at what
the wires are connected to.


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Unless ground connection is to be
made at that ground screw in the
pic. That would explain the claim of
three phase and no green wire.
Seems pretty hack though.
I would definitely track those three
wires inside the unit and see what’s
going on.


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Like said, take the cover off and see were the wires go. If all three goes to the switch then its 3 phase. If two go to the switch and one to ground/case then its 1 phase.

 

The sticker on the machine is not showing it as 3 phase.
2 places on it show single phase.
The top where the 1 AC is coming in and turning it to DC in the diagram.
Then bottom left side,
1-60hz

Black, blue and brown in the cable is Chinese BS. It should have a GREEN ground conductor in the supply cable. Guessing the blue may be the ground but no way to confirm except test and/or physically looking.

It is two hots and a ground conductor in that cable. Ring it out with ohm meter and see if one has zero resistance to the cabinet. Be sure though as the others could show a low reading also even with switch off in some cases but if switch is off likely be nothing on two of them and ground will be easy to identify.

Open and physically looking is another way to be sure you have the proper wire.

 

Thanks guys took the cover off. The blue wire looks to me to be grounded to the machine. The Black and Brown go into the on\off switch.
See pic attached. View attachment PIC_0569.JPG

 

I don't see how that could possibly be 3-phase, you have no "3rd Leg"....

 

Yea its a 1 phase unit. Blue is ground and the other 2 are hot.

 

Thanks guys, I assume this is 1 phase 220v. I'm wiring it up to my plug (pic. attached) . Blue wire to ground on plug, Black wire to black wire marked location on the plug and the brown wire to the spot marked white on the plug............seem right to you folks. View attachment PIC_0570.JPG View attachment PIC_0571.JPG View attachment PIC_0571.JPG View attachment PIC_0571.JPG

 

Thanks guys, I assume this is 1 phase 220v. I'm wiring it up to my plug (pic. attached) . Blue wire to ground on plug, Black wire to black wire marked location on the plug and the brown wire to the spot marked white on the plug............seem right to you folks.

Whatcha got there a 30 amp dryer cord cap ? Hard to tell from backside what the terminals are coming out. Dryer or welder outlet I recon.
They are single phase 240 volt. Your good plug it in.

 

Well boys looks like we've played this out and got all the information we are going to get. It is enough to get me through the problem. I want to thank all that replied with info and help, I really appreciate it. It is really terrific to have a place to go when you have a problem and need help.

Thanks again to all and to Daniel.

Thanks to the website.