Motors

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Dario

Member
Location
Boynton Beach, Florida
Occupation
Retired Contractor
if I replace a motor which is 120 volts with a 220 volts, same HP same RPM, would it save electricity?
It is for a table saw and other woodworking tools.
Thanks
 
raider1 said:
This seems to be a very stange question comming from an electrical contractor.

This might help P=IxE

Chris
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Yeah, you shouldn't need woodworking tools to wire a house.....:wink:
 
You won't save much on your electric bill. At wee bit perhaps, because the motor and circuit conductors might operate a bit cooler (read: More efficient).

Your motor might last longer as well. Motor start-up will be quicker, and when working under heavy load, the motor will appear to have more oomph! :grin:

This is all because of the increased efficiency, and extra capacity of the higher voltage circuits.
 
Dennis Alwon said:
Yeah, you shouldn't need woodworking tools to wire a house.....:wink:
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You'd be surprised at how often we have to become "carpenters" to properly install the electrical apparatus on some of our projects. :grin:
 
kbsparky said:
You'd be surprised at how often we have to become "carpenters" to properly install the electrical apparatus on some of our projects. :grin:
Click to expand...

I have a table saw, drill press. rotor, scroll saw, etc. also.
My comment on this was to ease the pain of the comment made by chris. I thought it was harsh and I tried to redirect the comment. Didn't do too well with it. That's why I had the wink there.
 
I've generally liked to wire as many of my larger woodworking tools as possible for 240 volt operation for one reason only. It keeps people from wanting to borrow my stuff. That's the same reason most of my trailers have pintle hitches, too. All of the air tools have the oddest quick-connect I could find in the Grainger catalog.
 
mdshunk said:
I've generally liked to wire as many of my larger woodworking tools as possible for 240 volt operation for one reason only. It keeps people from wanting to borrow my stuff. That's the same reason most of my trailers have pintle hitches, too. All of the air tools have the oddest quick-connect I could find in the Grainger catalog.
Click to expand...

That's pretty funny. - Just make wierd screeching noises in your garage at night, that'll keep the neighbors away too!
 
Dennis Alwon said:
I have a table saw, drill press. rotor, scroll saw, etc. also.
My comment on this was to ease the pain of the comment made by chris. I thought it was harsh and I tried to redirect the comment. Didn't do too well with it. That's why I had the wink there.
Click to expand...

I apologize if I came across harsh, I do that sometimes. (comes from being an inspector i guess:D)

It just struck me as an odd question, but on reflection I can see what it was he was asking.

Chris
 
I think it makes very little difference at all. You typically run these tools for short periods of time at far less then full load.

You do gain some advantage by being able to use smaller conductors, which is a convenience issue, and slightly cheaper to install. And the lower currents does have slightly less I^2R losses as someone else pointed out.
 
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