There's also the practical consideration that 110 outlets generally have
the second set of terminals to make it easy to daisy chain them. I've
never seen a 220 outlet with those. That means you'll need to use wire
nuts. Three big wire nuts, some fat wire, and a 220 outlet get too big
for the box pretty soon, so you'll need extra deep boxes, or a box
extender, and then after all that you're not equipped properly if you
ever need to weld something while the table saw is running and the
compressor kicks in. <g>
With separate circuits, you also get to put the right breaker on each
circuit. I have 2 tools that are 220 but not hardwired -- a 15 amp
table saw and a 50 amp welder. The plugs are different, so I'd have to
either put a 15 amp outlet on a 50 amp breaker (which is bad) or have my
welder pop the 15 amp breaker constantly. Each outlet has its own
correct size breaker now.
The separate panel is a fine idea.
-----Original Message-----
From: Randall Young [mailto:ryoung@navcomtech.com]
> Even though I'm supposed to be concentrating on some remodeling on
> Mom's rental, I've noticed my workshop is starting to gather more 220v
> tools than outlets. With 110 you can just add outlets on an existing
> circuit but I'm
> under the impression that only one 220v outlet per circuit.
There's no reason you can't daisy-chain 220v outlets just like 110v
outlets. The reason it isn't commonly done is that most 220v outlets are
not general purpose outlets, they're for a specific device. Of course,
if you plan to run multiple devices at one time, the circuit (and the
outlets) have to be big enough to handle the total current.
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