Reply by REO

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Posted on converting a unisaw 1.5hp motor from 115 volt to 220 volt

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928 posts in 2070 days

#1 posted 04-16-2013 06:25 PM

people have a tendency to think of electricity like water in a hose. often people will use the analogy and oversimplify an explanation but it is misguiding. The simple hose story leaves out resistance to flow, pressure, hose diameter etc. To get right down to it, a motor is designed to use a certain amount of electricity. it can only pass a given amount of water (HP or work) At a given pressure (110 volts) if you feed it with one hose (110) it will require a bigger hose to allow enough flow to satisfy the draw. if you split it up into two supplies (220 peak to peak 110 per leg, less if you use RMS because they are 180 out of phase.) you can use a smaller diameter hose. The total volume in the bucket over a given amount of time is still the same. smaller hoses are easier to run and

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