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Re: [Shop-talk] Table saw, (it's here.)

Subject: Re: [Shop-talk] Table saw, (it's here.)
From: Mark Andy <>
Date: Wed, 1 Jul 2009 09:56:01 -0400 (EDT)

On Wed, 1 Jul 2009, wrote:
> Thanks for the quick response.
> I ran a 3 conductor line to the saw (red, black, and white) with a bare
> ground wire as well.

If this is for a 220/230/240 single phase line and its wired correctly, 
the red and black are hot (each side of the split phase or whatever you 
want to call it :-), the white is the neutral for 120vac loads, and the 
bare wire is the safety ground.

You'd wire your 220vac saw to the red & black to get the 220vac.  You'd 
wire a regular 110vac load to either the red/white or the black/white to 
get the 110vac from one or the other of the split phases.  You'd wire the 
safety ground to the chassis in both cases.

This is, AFAIK (and I'm not an electrician, so you get what you pay for) 
completely within the spec & intent of the all the codes.  Its how dryers 
& electric stoves work, etc.

> mechanically, I understand how I can get the 120 outlet, but I don't 
> understand, if it's safe.  and if it is, how do I breaker the wire? 
> (do I use a common single breaker for 240 or do i use 2X 120 breakers?)

I don't know the code here, but I would think either would work fine.  I 
imagine a common single breaker is really two breakers inside anyway, one 
for each split phase.

> Also, is there a "better way" to do it (the 120 outlet after the 240, or
> the 240 after the 120?)

Electrically it shouldn't matter at all, except maybe if you use GFCI 
110vac outlets?  If you wanted GFCI outlets, I'd put them after the saw, 
but I have no idea if that's required.

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