how many 220s do you need/wish you had?

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Forum topic by CplSteel posted 08-08-2012 09:50 AM 1539 views 1 time favorited 29 replies Add to Favorites Watch
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142 posts in 2132 days

08-08-2012 09:50 AM

Topic tags/keywords: question

The title is somewhat self explanatory. I plan on adding some electrical soon and can’t decide how many 220s I will want.. I figure at least 3 will leave me with options. What do you guys think?

29 replies so far

View bent's profile


311 posts in 3637 days

#1 posted 08-08-2012 10:04 AM

when i rewired my shop, i ran 3/10 romex to all the outlets. that way you can convert any of them to 220 or 30A as needed.

View hhhopks's profile


651 posts in 2345 days

#2 posted 08-08-2012 10:06 AM

I only have one along with an extension cord for 220. Currently, I only have three tools on 220 (compressor, sander, table saw).

The question is how many tools are you going to run at the same time at 220?.
I can think of two (table saw & duist collector).
Having a dedicated service would be nice.

Yes, the extra 220 will give you options. Still, make sure your extension cord is long enough to reach it. Actually the cord will give you the most flexiblity. It’s just a pain to connect/dis-connect….....

You also need extra 110s circuits too. When a common circuit is shared (Ex: table saw & dust collector), you may run into problem of drawing overcurrent and trip the circuit breaker at the panel. Having additional circuit will allow you run couple tools at the same time.

So yes, if you have extra 220s that would be great and you can reduce the number of 110s. But having extra 110s are great too. We all get caught up on the new tools until we actully use it on a project and relize our infrastructure doesn’t match our usage.

-- I'll be a woodworker when I grow up. HHHOPKS

View b2rtch's profile


4851 posts in 3016 days

#3 posted 08-08-2012 10:13 AM

I have one or two on each wall.
How many machine running 220 might you buy?
Table saw, jointer, planer, welder, dust collector, band saw,air conditioner,electric heater, what else?
So, if you have four or five o them in your shop you should be OK.
I have a 100 Amps panel and 5×220 outlets and I am good so far.

-- Bert

View kizerpea's profile


774 posts in 2336 days

#4 posted 08-08-2012 01:10 PM

I have 18..220 outlets around my shop…if i need to move a machine i have the outlet….i hate drop cord in the shop..


View dbhost's profile


5705 posts in 3200 days

#5 posted 08-08-2012 01:16 PM

I am in the process of running a sub panel for my shop. Nothing huge, just enough to feed my needs. Lighting staying on house circuit, 3 110 circuits, 3 220. The 220s won’t get used for quite some time. Most likely the first one will be my 1.5 HP motor for my wide drum sander build. Might as well start out with it that way. Next upgrade would likely be a new dust collector / cyclone. But my HF DC works well enough for now. The third really doesn’t need to be there. It runs HVAC which is 110V and no need to replace yet, or even close to yet. Would be good to have the power there if I need…

The main circuit, the one dedicated to power tools, will have 3 outlets. So I am going to be running a total of 5 220 outlets…

-- Please like and subscribe to my YouTube Channel

View Gene Howe's profile

Gene Howe

10369 posts in 3397 days

#6 posted 08-08-2012 01:54 PM

One for an air compressor.
I wish I had more. I wish even more that there were 3 phase available to the shop.

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

View blackcherry's profile


3337 posts in 3791 days

#7 posted 08-08-2012 02:01 PM

As stated above how many can you run at the same time, in my shop I have two outlets gear up but only one 30A breaker. This way I don’t have to keep unplugging the two machines. Good luck on what you decide to do…Blkcherry

View Ken90712's profile


17553 posts in 3157 days

#8 posted 08-08-2012 02:01 PM

Which I had more!!!!! Only have 4 ughhh

-- Ken, "Everyday above ground is a good day!"

View Mainiac Matt 's profile

Mainiac Matt

7948 posts in 2297 days

#9 posted 08-08-2012 02:28 PM

for my 400 sf. basement shop…. I need two for now and three in the future

1 for TS
1 for DC

and if my 115 v oiless air compressor ever give up the ghost (the thing is 20 years old and still kickin’) I’m replacing it with a 60 gal. two stage twin cyl. upright with a 5 HP 220 v motor.

I can’t see any other requirements in my future.

-- It’s the knowledge in your head, skill in your hands and motivation to create in you heart that makes you a woodworker. - Mainiac Matt

View JCantin's profile


179 posts in 3380 days

#10 posted 08-08-2012 03:23 PM

Not very fluent in things electrical but assuming there’s room on an existing panel what’s the rough cost to have an electrician add a 220 outlet? And if a subpanel is needed…?

View Loren's profile (online now)


10278 posts in 3616 days

#11 posted 08-08-2012 03:34 PM

Well, think about what you’d want to leave hooked up to

Examples are: table saw, dust collector, air compressor.

Most other machines are going to be intermittently used
and plugging them in is no big deal. If you shop is big and
you have room for permanent infeed/outfeed areas for
each machine, that’s nice. As a practical matter I
have all my stuff on wheels and positioning machines
and plugging them in is part of the process.

I have only 2 220 volt outlets and I get by with them
fine, but my DC and air compressor are 110.

View dbhost's profile


5705 posts in 3200 days

#12 posted 08-08-2012 04:17 PM

Sorry, I was in a hurry on my last response. Let me be a little clearer on what I am trying to say…

In my in progress electrical project, I am adding 6 circuits, 3 of them 110V, 3 of them 220V. All of the 110, and 2 of the 220 are 20 amp, 1 220 is 30 amp.

Right now, every last bit of my equipment is 110V only. And most of it is not dual voltage capable.

My 29 gallon air compressor is less than 2 months old, and I am tickled silly with it. No chance that is going to be changed out for 220 any time soon.

My air conditioner, 13.5K BTU portable unit is 110V only, and works flawlessly. Because I want to be able to press portable units into service INSIDE the house if the AC ever goes out again, I want to stay 110V with this. Very little chance I will go away from that. Ever. Same goes with heat. My little oil filled radiator takes a while to heat up the shop, but once it is warm, the shop stays toasty on the lowest setting, no need for 220V here…

Dust collector. It works, but I have a big desire for a 3HP cyclone. That will require 220V for sure.

Band Saw, lathe, miter saw? All Harbor Freight 110V, not convertible, and working flawlessly…

Table saw? I am saving my $$ up for a 3 HP SawStop PCS. The cyclone and SawStop are why I want 220V. I actually very much love my Ryobi BT3100-1, it is a way better saw than folks give credit for, but it lacks a blade brake. While I hate the SawStop inventors legal / legislative tactics, I do like the product… Like I mentioned, if Grizzly offered the G0961 type saw with a similar, or better technology safety devices, I would be all over that.
I am hopeful by the time I can afford one, they will offer just such a saw.

Jointer, Planer, sanders? All bench top, all 110V and very likely to stay that way. I am happy with the way they work, and I do not want to dedicate floor space for dedicated floor models!

-- Please like and subscribe to my YouTube Channel

View MonteCristo's profile


2099 posts in 2157 days

#13 posted 08-08-2012 05:23 PM

The flipant answer is “you can never have enough”. More seriously, it depends on how many machines you have that are heavy drawers of electricity. Many motors can run on 110 or 220 and, especially if they are close to being maxed out on 110, it is better to run them on 220 with 1/2 the AMPS because they will run cooler and your wiring won’t get cooked.

-- Dwight - "Free legal advice available - contact Dewey, Cheetam & Howe""

View CplSteel's profile


142 posts in 2132 days

#14 posted 08-08-2012 05:55 PM

Maybe I should have worded the question differently, but ideally I would have a 220 on each wall and a drop down for a center position TS. That leaves me options. Even if I only have 2 or 3 tools that can use them (TS, dust collector and ?)

However, my understanding of local building codes (which may very well be wrong) is that a 220 line can only run to one outlet. If I could run them to more than one outlet then I would run a 220 20amp to a drop down TS, a 220 20amp to dust collection and a 220 30 amp around the room with 4 or 5 outlets. That would give me lots of options on the third 220 tool, and I could have more than one if I do not use them at the same time (I won’t be jointing and a planer at the same time, probably….) But that is not allowed.

So, and I know little about electricity so I may be wrong, but if I run 2 20amp and one 30 amp that leaves me with 2 15amp out of a 100 amp sub panel, which does not seem like enough for everything else.

I like Bent’s idea as a stop gap to leave it flexible.

View hhhopks's profile


651 posts in 2345 days

#15 posted 08-08-2012 06:19 PM

Oh yes.
With the recent triple digit temperature, a dedicated 220 for the AC & Heating is a must for the garge workshop!

-- I'll be a woodworker when I grow up. HHHOPKS

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