I have 3 phase running some wood working equip, planer, table saw, etc.
The old dust collector also ran on the 3 phase, and automatically
turned on when you turned on a machine.
I guess they wired the collector into the switch on the machine.

New collector is 220, can I just cap one wire and use the other two
to power up the new collector?

 

What is the wire and breaker size?

Still, I would run another circuit, Yeti. It will pay-off in the long run IMHO.

 

#8 wire on a 30amp breaker.

I like the way the collector would come on when turning the equip on, but both were 3 phase and the new collector is 220. I guess if I have to install seperate switch for the collector, and pull new wire from the panel, it wouldn't be a big pain.


Thanks Big Orn

 

New collector is 220, can I just cap one wire and use the other two
to power up the new collector?
__________________
No. A single phase motor will not run on 3 phase. I know you can buy a transformer to change single phase to 3 phase but I don't know abour 3 to single. Ask about the transformer.

 

Ok no biggie, I can just put a new 2 pole breaker in my panel, pull 2 new wires to the collector and wire it up correct?
Both old and new are 230v, just old was 3 phase and new is single.

Also, is there such a thing as a 3 way on/off switch for 230v?
I would like to be able to turn it on or off from 2 different locations.

Thanks

 

Is your building supplied with a delta or a wye form of three phase. A wye system which is 208 will be fine if you just cap one off. If you have a delta system which is in the range of 440 to 477 volts you would need a transformer.
Hope this helps

Dan 03 Ranger EDGE 4x4 5speed

 

It is wye. At this point I think I will just pull some new wire so it's not hob cobby.

Although I would like to switch it on and off at 2 different locations, is that possible?

 

Yes, but you will have to pull additional wire. Use only one switch for the power and pull the wire from that switch to the collector, then from the collector to the other switch. This is where it gets hairy. Make sure that you break the circuit completely and not just pull out a leg.

 

Ok, Big Orn that sounds easy enough, what type of switch for that? 3 pole or ? Since I will have to hots....


Can I use a Double-Pole Double-Throw in series?

 

Yeti, -do you know an electrician that will give you a hand. Even if you had to pay for the job it might just be worth sleeping better at night. If your wiring causes a fire the insurance company won't pay for it.

 

Naw, most I could loose is the machines, its a cinder building with nothing more than 3 machines in it.

I like challenges

 

Ok I was rong.
So shoe me.
August 5, 1997

Why does a single phase 220 volt motor run off two legs of a three-phase circuit?

In three-phase power, the voltages of the three power wires fluctuate up and down cyclically so that they are "120 degrees" apart. By "120 degrees" apart, I mean that each wire reaches its peak voltage at a separate time--first the X wire, then the Y wire, and then the Z wire--with the Y wire reaching its peak 1/3 of the 360 degree cycle (or 120 degrees) after the X wire and the Z wire reaching its peak 1/3 of the 360 degree cycle (or 120 degrees) after the Y wire.

The specific voltages and their relationships with ground or a possible fourth "neutral" wire depend on the exact type of transformer arrangement that supplies your home or business. In the standard "Delta" arrangement (which you can find discussed at sites dealing with power distribution), the voltage differences between any pair of the three phases is typically 240 VAC. In the standard "Wye" arrangement, the typical voltage difference between any pair of phases is 208 VAC and the voltage difference between any single phase and ground is 120 VAC. And in the "Center-Tapped Grounded Delta" arrangement, the voltage difference between any pair of phases is 240 VAC and the voltage difference between a single phase and neutral is 120, 120, and 208 VAC respectively (yes, the three phases behave differently in this third arrangement).

If you run a single-phase 220 VAC motor from two wires of a Delta arrangement power outlet, that motor will receive a little more voltage (240 VAC) than it was designed for and if you run it from two wires of a Wye arrangement outlet, it will receive a little less voltage (208 VAC) than appropriate. Still, the motor will probably run adequately and it's unlikely that you'll ever notice the difference

 

Not me, I appreciate the help!!

 

yes, you can run a single phase motor from a 3 phase power source, as long as you check the voltage on each phase ( use just two of the 3 phases) and be sure you do not hook on to the "high" leg if you have one, as mentioned above. In commercial and industrial apllications all the load centers (breaker boxes) are 3 phase supplied panelboards, they just use 2 hot or 3 hot wires to supply the single phase or 3 phase loads. Be sure your existing wire is large enough to carry the amp draw of your single phase motor. One of the advantages of 3 phase power is , effieciency and lower power consumption, so your single phase motor may have a higher current draw. Size your wire and overcurrent protection (breaker) accordingly. All you will need to do is change the existing 3 pole breaker to a two pole breaker for your new motor, with the correct breaker rating (20 amp, 30 amp, etc) . Be sure and hook up your equipment grounding conductor ! Be sure and safely cap off the unused wire on the motor end ,and in the breaker box. I would not pull the extra conductor out, you might switch back to a 3 phase motor some day. And yes , you can set up mutiple control stations for your motor. You will need to put a 2 pole magnetic starter at your new motor, then using 3 wire control circuits, set start / stop stations at your locations where you want to control the motor. The start buttons (normally open contacts ) are wired in parallel and the stop buttons ( normally closed contacts) are wired in series, along with using a set of auxilary contacts on the starter for maintained contact. You may want to hire a pro for this option, work safe above all, good luck,

 

Thanks Greg, very helpfull!

The stop/starts are already in place from the last collector.
There is already #8 thhn wire there so that should be good, the new motor amp rates are at 13 (the old was 17), so I will go with a 20amp breaker.