Any shop tools require 120+240?

[crazybrit]

An electric clothes dryer is obviously the #1 appliance that comes to mind when thinking of something that is 240v and requires a neutral for 120v.

I know lots of shop tools that require 240v (two hots and a ground) but are there any tools that require an additional neutral for simultaneous 240+120v? I can't think of any.

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[justanengineer]

CNCs and other industrial equipment commonly need 240 to the spindle and 120 for controls, just like your dryer example. If you’re pulling wire, I’d go ahead and pull four in case you ever need it.


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[crazybrit]

CNCs and other industrial equipment commonly need 240 to the spindle and 120 for controls, just like your dryer example. If you’re pulling wire, I’d go ahead and pull four in case you ever need it.


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I'm actually pulling for my CNC mill. Its 240v 10A (no neutral) but you accurately understood the basis of my question.

I have some 10/2 but I do like to future proof hence the Q. I was hoping noone would come back with a use case for /3 so I could be lazy

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[tool_scrounge]

I'm actually pulling for my CNC mill. Its 240v 10A (no neutral) but you accurately understood the basis of my question.

I have some 10/2 but I do like to future proof hence the Q. I was hoping noone would come back with a use case for /3 so I could be lazy

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I guess it comes down to how poor you are vs. how much time to do want to risk rewiring it.

But if you are going to run a welder or a three phase converter in the future AND you have the amperage, you might consider running larger wire to have options.

 

[crazybrit]

I already have a 50A 240 circuit for welder and 30A 240v for misc use. For both these I pulled /3 but i have no idea why as I have never used the neutral.

Pulling this third circuit, I was curious if anything shop tool wise used a neutral.

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[dutchgray]

I would pull the wire you need for the machine you are powering, I find trying to predict for future use in the shop you just end up with a load of wiring that never gets used or when you do want to use it is the wrong type or in the wrong place.
If you already have wire that will work for your current need, use it.

 

[crazybrit]

At this point I'm mostly curious on what else if anything uses 120v and 240v. Curiosity at this point I guess

Thanks for the comments

 

[American Locomotive]

I do not know of any other device besides a clothes dryer and oven/range that would need a neutral. Honestly, I don't even understand WHY clothes dryers still use 120v motors unless it's just to have commonality with gas-fired models or tradition.

Most CNCs I know of have their own internal transformer for control voltages.

Really, the only reason I can think of to install a 4-wire circuit and a NEMA 14-30/50/60 outlet would be for back-feeding from a generator. That's about it.

 

[Renegade1LI]

I have a powermatic PM 30 that is 220v 3phase with a on board transformer that steps it down to 110 single phase for the built in dust collector.