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Reply by Catspaw

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Posted on MORE Power!!! 120 vs 240 volts

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Catspaw

236 posts in 3627 days


#1 posted 05-15-2008 06:04 AM

Bob #2…see Bill Davis above.

240 motors start alittle quicker ‘cause they’re hit with 240 at start up. A motor will draw alot of current until it gets up to speed and starts generating counter emf. The quicker the start, the less current used for start-up. Also less voltage drop because the amperage is halved so less watts lost in the wiring. Although as Bill pointed out if the wiring is sized correctly, this drop is usually minimal.

These factors are what I consider “more efficient”. chances are you’d never notice a difference in your electric bill though.

I’ve heard that 240 saves on your motor life through less heat. But, I think that isn’t true because watts are watts. With 120, coils are wired in parallel, with 240 they’re in series. 120V/10A = 5A through each coil or 240V/5A, still through each coil.

What happens if you wire an adirondack chair for 240V?

-- arborial reconfiguration specialist


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