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).

"Kevin" wrote in message l.net...
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.


I would
I hate being in the dark when you trip a breaker or it
needs to be shut off, and you can still have light to work
Just put all the lights on a 15-amp breaker
You forgot the 80% rule Just because you didn't trip a breaker on your 20A
Means nothing at all
20-amp breakers can only carry 16 amps-80 percent of their rating-on a continuous basis. Continuous basis is considered to be a circuit loaded to capacity for three hours or more.
So dust collector (5.5A, 1.5HP) on it's own could have the lights added

Spud

Yeah, there's a 20A circuit now that runs the outlets , 2 garage door
openers, and 2 lights sockets inside and 2 outside. I'm going to see about
intercepting the lighting circuit and put them on their own 20A service. I
need to drop in a few ceiling outlets anyway for more fixtures, so hopefully
it will be simple enough to drop in that extra circuit. Since I put in the
two 220V circuits I have the wall about the panel opened up already.


"spud42" wrote in message
...

"Kevin" wrote in message
l.net...
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.


I would
I hate being in the dark when you trip a breaker or it
needs to be shut off, and you can still have light to work
Just put all the lights on a 15-amp breaker
You forgot the 80% rule Just because you didn't trip a breaker on your 20A
Means nothing at all
20-amp breakers can only carry 16 amps-80 percent of their rating-on a
continuous basis. Continuous basis is considered to be a circuit loaded to
capacity for three hours or more.
So dust collector (5.5A, 1.5HP) on it's own could have the lights added

Spud