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Unisaw wiring 220v 50 amp too much?

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Forum topic by waltmoe posted 651 days ago 963 views 0 times favorited 7 replies Add to Favorites Watch
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waltmoe

1 post in 651 days


651 days ago

I just purchase a used Delta Unisaw, perfect condition. I am new to wood working and am staring to install some other wood working equipment.

I have a 220v 50 amp circuit in my garage for a Mig welder. Is 50 amps too much to use for for the Unisaw? I just want to avoid pulling another 220 amp circuit just for this saw..

Thanks for your assistance.


7 replies so far

View Don W's profile

Don W

14498 posts in 1154 days


#1 posted 651 days ago

a 50 amp circuit just means thats how much juice you can draw before the breaker trips. A 30 amp saw will still only (well should only, unless something is wrong) draw 30 amps. Personally I’d use the circuit. The other thing you can do is just switch the breaker. (of course the welder will then probably trip the breaker)

-- Master hand plane hoarder. - http://timetestedtools.com

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toolie

1714 posts in 1215 days


#2 posted 651 days ago

+1. does the unisaw have a magnetic starter switch?

-- there's a solution to every problem.......you just have to be willing to find it.

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Loren

7173 posts in 2235 days


#3 posted 651 days ago

If the saw already has overload protection on the motor or
in a magnetic starter, it should be fine. A Unisaw
wired for single phase is unlikely not to have overload
protection.

-- http://lawoodworking.com

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jmos

681 posts in 956 days


#4 posted 651 days ago

Use the circuit. The breaker is there to protect the wiring, not the motor; you run light bulbs on 15 amp circuits and they don’t draw anything close to 15 amps. You could replace the 50amp breaker with a lower amperage breaker, that more closely matches the motor, if you like, the wiring will just be over sized. The bad situation is having too large a breaker for what the wiring can handle.

-- John

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mbs

1418 posts in 1527 days


#5 posted 651 days ago

+1 use it.

-- Sorry the reply is so long. I didn't have time to write a short reply.

View crank49's profile

crank49

3325 posts in 1558 days


#6 posted 651 days ago

It will be fine.
For all the reasons already mentioned.
Plus, a motor pulls several times its rated running amps to get started.
For example, If running amps is 12 the initial surge might be 50 amps, but for less than a second.

-- Michael :-{| “If you tell a big enough lie and tell it frequently enough, it will be believed.” ― A H

View Rob Drown's profile

Rob Drown

711 posts in 2420 days


#7 posted 651 days ago

Everything said is correct. If you keep the 50 amp breaker, then any additional wire added to that circuit should be rated for 50 amps, not the rating of the motor.

-- The expectations of life depend upon diligence; the mechanic that would perfect his work must first sharpen his tools. Confucius, 经过艰苦的努力的梦想可以成真

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