The heater is made to be wired directly so any 220 volt cord or plug type can be used as long as the wire is 10 gauge or sized to handle the 22 amp load. I'm happy to say I've got a heated garage brew room now and it really feels good doing stuff out there without having to be all bundled up. The store had only one 220 volt 5,000 watt wall mounted heater left, it was on display and I was able to buy it for 10% off. I ended up buying a 4 wire electric dryer cord that is compatible with my existing 220 volt wall outlet. The lawyers cost a lot more than the right wire.Just wanted to provide my latest update since yesterday. If for no other reason than the liability it would create would be shut down by the legal department. I might worry that an import machine would have incorrect colors, but Miller wouldn't do that. There is little standardization for plugs in this range, so they often just have the user source whatever they need for their shop. It's pretty common for multi-input devices like that to not include plugs. I suspect inverter welders work like VFDs, converting it into a strong DC source, then using switching transistors to create the output. I would guess they included 3 phase input as an option for industrial users for convenience. That's a pretty commonly available setup. If it's rated for 220V/45A single phase, I wouldn't bother with setting it up for 3 phase input. And better manufacturers would design fail-safe setups to prevent it. But if you follow the directions using the color codes, you'll be fine. In theory, running hot to the ground side could cause a problem. There is some risk to the welder, but it's quite low. Same thing, just more complex switching setups. The 3 phase wires are usually just L1/L2/元, and your lathe likely just swapped two of them around when you did that. "Brushless DC" motors are just 3 phase motors. Again, simplified, and I'm not positive I totally understand it. Switching two wires changes the relationship, making the motor spin the other way. It works similarly between phases, but they way the motors work is that alternating poles are on different phases, so the magnetic field is almost rotating itself around the motor. ![]() It's a bit oversimplified, but you don't need all that just to connect a welder safely.ģ phase is each phase 120 degrees off from the next. You connect the metal case of the equipment to ground, and any stray voltage flows there instead of into the unwary person touching it. It doesn't "need" ground either, but ground is included for safety. That was a bit long-winded to say what amounted to "because it's AC" I guess, but you seem the type that likes to get info.Ģ20V like this doesn't need a neutral and current flows basically between the two phase wires. Just don't treat them as the same thing, or you create the possible safety hazard they added the separate line to fix. But in your panel, neutral and ground are connected. And it did create a shock hazard as "ground" could actually have some stray voltage on it. Newer equipment gets angry if you do that, and wants a dedicated neutral for 120V. Single phase 220 is actually just two 120V phases 180 degrees out of sync.
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