I am about to get a Delta Contractor saw, and I would like to run it at 240 volt. I have done 120 volt circuits before, but I need to check to make sure I have everything connection correct.
The saw is a Delta 36-682, I’m assuming that the motor will draw around 8-10 amps @ 240 volts, I can’t remember what the plate said. I was planning on adding a 2 pole 20 amp breaker and using 12 ga romex to go to the plug, which is only a few feet from the panel.
Look at the diagram, and let me know if I need to change anything.
Thanks,
Josh
Replies
Looks good to me. If you go to the Delta site and poke around a while, you can find the owner's manual for that saw and it shows basically the same thing.
looks fine, have fun !
that is the receptacle you are going to use correct?
It is a 240 volt 20 amp receptacle. Home Depot calls it a "Air Conditioner" plug.
well there's a surprise...... If you need to know specifically, it is a NEMA 6-20R"
Just out of curiousity, if the receptacle were going to be further from the panel, say 40 or 50 feet away, would there be any advantage to running 10 ga cable instead of 12?
It wouldn't hurt anything, but 40 or 50 feet shouldn't be any problem for 12 gauge wire. It's still close enough that you won't have significant voltage drop. Here's a link to an online voltage drop calculator I like to use: http://www.electrician.com/vd_calculator.htmlGenerally, you want to keep the voltage drop less than 3%. If you enter 240vac single phase power, 12 gauge wire, 50 feet distance, and a running current of around 12 amps you only get 1% voltage drop.
Ryan, many folks here worry about VD,
sometimes the concern is genuine, but this time 50 -60 feet will be just fine , no need to go BIG with the wire"
Thanks to all for the help. I'm setting up a Jet contractor saw for 240, and the run will be appox 40 - 50 ft.
in vino veritas
Ryan1 anytime, don't forget to bookmark the calculator that Stuart posted"
From your descriptions I think you have it right.
But your drawing is not correct.
The ground should go to the GROUND BUS BAR in the panel, not to earth ground.
While it might sooner or later end up connected to something that is connected to something that is earth grounded the most important thing is that it be connected to the ground bus bar that is is bonded to the neutral at one and only one place in the system.