I expect to be buying a new saw and maybe a dust collector in a couple
months. Since I have about maxed out my two circuits in the shop already, I
will be putting in a new 240v line. Since I have some free time now, I
would like to get on it.
Presumably a 20a circuit will be adequate for a contractor saw and a small
DC (7 or 8 amps each?) but do they need a neutral? I have a big coil of
12/2 and I would prefer to use it up instead of buying 12/3, but will
obviously get what the equipment requires. And what is the outlet, the one
with the two blades going the wrong way (6-20R)?
Go to HD and get a 125 Amp panel. Connect it to a 60 Amp breaker in the house
panel. Run 3 # 6 and a bare copper ground between the panels. Drive a ground
rod/stake at the new panel and connect it to the ground buss in the new panel.
Then you will be sitting fat for electrical for a long time.
There should NOT be two ground rods connected at different locations in the
electrical system. There may be more than one ground rod but they all should
be connected to the system at one point -- at the entrance panel.
Damn, I hate when people give electrical advice that is against code, and
Better off contacting an electrician, stopping by and giving him 20 bucks to
give you real advise, than take what you learn here at face value.
Basically, Bob, no. That is not the proper way to do it.
Original poster, yes, 12 2 with ground will be fine, but don't use it for
220 and 110 at the same time, or on the same circuit.
Nope, no neutral is necessary for a dedicated 240v for most shop tools ...
12/2 w/ground is what you want and will work fine for a 20A 240v dedicated
circuit. Just tag the white wire at the panel and the receptacle with black
tape to indicate that it is hot.
NOTE: You might want bigger wire and a 30-40A circuit for your dust
collector ... check that out before you go pulling wire.
That's what you want for 20A:
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