Yeah, I know; this is mostly an academic discussion.

I did try to have the DC and jointer running, and then switched on the TS.
That still did not trip it.

Pragmatically, what I've wired is exactly as I expect -- a dedicated DC
circuit and one other for the tool solo use (TS, jointer, TBD).

Now my more pressing reality is that the 110 outlets and lighting are on
another 20A circuit. I'm contemplating installing more ceiling outlets for
about 12 shoplight fixtures (12x2x40 (maybe 32) ) or 768 watts or about 7
amps. That leaves 13A for the other 110 power tools ( 1 hp bandsaw, rated
10A, miter box, 12.5" planer, etc). I'm contemplating adding another 110
circuit for the lights.


wrote in message
...
On Nov 27, 7:15 am, wrote:
On Nov 27, 2:15 am, "Kevin" wrote:



I just finished wiring in two 220V circuits to the shop -- 1 for the
dust
collector (5.5A), and the other for the tablesaw (14.5A), jointer
(6.5A),
and tbd.

Just for grins I put all of them onto the one circuit. So 5.5+14.5+6.5 =
26.5A. The 20A breaker did not trip. I even tried starting up the
tablesaw
while the others were running.

Now in practice, I will keep my dust collector (5.5A, 1.5HP) on it's own
circuit, but apparently I could concurrently run both the tablesaw
(14.5A)
and the jointer (6.5A) and possibly even a 3rd TBD on that other
circuit.
How is that? The real load must be under 20A, or the 20A breaker allows
more like 28A.

I first tried the TS and Jointer, and when they did not trip the breaker
(total 21A), I added the DC. I was surprised all three did not trip the
breaker. But I guess each was running with no load, so that is surely
another reason.

Curious,

Those ratings are for machines with a maximum work load. In other
words, a saw just spinning doesn't pull as many amps as one ripping a
big piece of wood. If you put them to work instead of just spinning
them up, your results would be different.

Or, if you could switch them all on at the same time (starting load).