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I bought the new Dayton 3 phase 208/230vac blower model #3HMJ8. There is 3 wires red/white/black and next to the diagram for each wire on the blower is a letter. I don’t know what these letters mean.. my goal is to have it hooked up to a clothes dryer cord/plug that’s 240v so I can just plug it in and use as a fan as needed.. can anyone tell me how to hook his up.... graingers instructions are horrible I emailed them no reply yet enter image description here

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    \$\begingroup\$ You can't hook up a 3 phase motor to a split 1 phase supply without big phase shifting caps. wrong motor. \$\endgroup\$ – Tony Stewart Sunnyskyguy EE75 Sep 5 '18 at 17:18
  • \$\begingroup\$ If you have three phase power, which I doubt, you just connect the three wires to the three hot phase wires and the frame of the motor to ground. If the three phase power has a neutral, you don'd connect it to anything. \$\endgroup\$ – Charles Cowie Sep 5 '18 at 17:21
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On the label (bottom pic) it is clear, after the word "VOLTS" is the term "3PH".

That means the device is meant to operate on 3-phase AC power. That's not what the normal house has installed and you cannot, therefore, easily use.

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  • \$\begingroup\$ ok thanks so its pretty much useless lol. could i use just 2 of the hot wires possibly on the blower and cap one and get it working with less power or is this impossible as well \$\endgroup\$ – Ben Baker Sep 5 '18 at 17:42
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schematic

simulate this circuit – Schematic created using CircuitLab

This is North American residential standard 240Vac split phase (120L1,120L2+N)

For bigger motors, some people buy VFD generators. 1 to 3Ph.

It is not a perfect match and supplies 240V ph-ph instead of 208~230V ph-ph rated. It might have 50% speed since 60Hz requires more voltage than 50V motors (V/F) and the phases are not balanced.

This is my estimate of what you need. I have not done this myself.

The cap you must buy may be used for PFC or Motor Start/run cap rated > 400Vac. Depending on inductance of motor, determines value of 40uF cap. Seach for better values online or measure actual motor inductance.

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