Join Date: Mar 2018
Location: Huntington Beach, California
We had done a remodel and added a 100 amp sub panel in the garage.
I had a 120 volt Jet contractor saw and switched to a 240 volt Unisaw. The Jet was on a 20 Amp circuit with 12 gauge wire from the sub panel. The Unisaw is on a 30 Amp circuit with 10 gauge wire from the sub panel. In other words, both had ample amperage for operation.
When I turned the Jet saw on, it was normal. Sort of a bit of a run up to full speed.
When I turn on the Unisaw it is more like turning a light on. It just explodes to full speed. There is no detectable run up or start.
I liked the way that the Unisaw ran on 240 so much that I converted the dust collector to 240 also. I bought a 240 volt Long Ranger so I could turn it on remotely.
The advice here is to put both on 240 volts and higher amperage than needed. It is well worth it in the long run.
And, yes the saw will run more efficiently on 240 volts, especially on the higher amperage circuit. Not a lot more efficient but somewhat more efficient. The reason is something called IR drop. (I won't go into IR drop as it belongs on an Electrical Engineering forum and not a woodworking forum.)
In furniture 1/32" is a Grand Canyon
Last edited by NoThankyou; 10-23-2019 at 12:19 AM.
Reason: Cutting the nay sayers off at the pass.