Lets just say I ran myself out of outlets, I wired up 19 today in a 8x20 space and have 5 more to put in after I get more... I alternated them on the wall so unless you are on the opposite wall you are on a separate breaker, put in two 20A breakers for that area which should cover it, there's 4 junction boxes so would be easy to break it apart later... I have more outlets but they're used and for some reason someone took out all the screws that hold them into the boxes... I probably have several #6 screws that would work but not feeling it... I haven't done all the splicing in the junction boxes yet, I ran out of go after dinner and once I got the boxes wired... just realized I need to add in another so I can get more lights under the loft...
Sounds like my work is done here regarding outlets, my son.
Another thing I would suggest. Do you have a floor plan of your whole shop, and the top and the bottom of this new addition? Do you know where each and every one of your tools is going to go? Do you know which tools you’re planning to acquire?
I’ve been doing all this stuff all my life, and I still play “paper doll house.“ I make a large scale plan drawing, and then I cut out little squares of paper, usually colored paper, the approximate scale/size of whatever I’m going to put in there. I’ve even gone to the trouble of making a square, or circle, the size of the work area, with a smaller square inside that, with what the actual use or equipment would be. I have my drill press, and my chopsaw set up down one wall, with a couple of supported 2 x 4s sticky straight out from the wall at the right level, so I can handle 20 foot pieces of whatever and drill holes or cut it on the square
Then visualize the specifics of every workstation. I think 1/3 or more of my outlets are not 16 inches off the floor. Of those, many are about chest height, but some are even higher. I have different tables, and the outlets on the wall are about 15 inches higher than the top of the table.Some tools might require three or four outlets for feeding the machine, but then for lights, accessories, who knows. It takes about two seconds to do a sketch and visualize the ideal locations for such things.
Don’t underestimate the value of pull chain lights, or a pull chain operated outlet. I’m the world‘s largest fan of pull chain switches in and around a workshop or maintenance area. If you’re paying the electrical bill, why have the lights of the whole shop on when you’re working in one corner. I have lights that go on all through the shop tapped off the garage door opener, but they time out. I have a small subset on one switch, and then the whole lighting of the garage. I did my LED lighting when I was hurt and sick, so it’s kind of funky, but I used to have six 100lightbulbs. In hindsight, that was like working in a cave.
What about an outlet or a light on the outside of the building close to where you’ll be doing this stuff on the inside?
I also have a few 220 V single phase lines running across the shop. One is for an in wall space heater in the bathroom that I never use, it’s too big, but that was the code. I have a small twist block outlet where I use a laminating machine. The machine doesn’t justify needing 220 V, but if you go on eBay and you buy them, the 220 V machines are 1/3 the price of the 110 V machines. So I put it in an outlet, and I made a 20 foot long cord.
My panel is to the right of the garage door when you walk in. Along the way I got a squirrel cage blower that’s about 2 feet in diameter, and about 18 inches wide. That’s 220 V. That exact size may be off, but it is much larger than the squirrel cage blower in a home unit. I plan on installing it in the back wall to move a lot of air through the shop. When I built the addition, and bumped the wall back to a total of 45 feet plus or minus, I ran a 220 line that just dangles near the peak back there.
Finally, somewhere in my junk collecting, I picked up a used power filter that I think is good for 15 A. It’s the kind of thing you use for electronic equipment or laboratory equipment where you can’t have variations in the current. It’s also a damn near fool proof lightning protector. I started installing it 10 years ago, and I haven’t gotten too far, but I will probably finish it up this year. I have two TVs out there, and two places I might use a laptop. I also have a vinyl, cutting sign machine, and a couple of other things with an electronic brain. My plan is to get a different color 14/2 with ground for that. Remember kicking on and off some of the higher draw machines in the garage can affect that TV/computer circuit. I don’t know if I would’ve ever bought one at retail price, but I got mine for no bucks or a few bucks. It also has a battery back up, but I don’t have the battery
My point, think of each location, step-by-step, and let your mind wander. It’s easier to put it in now that it will be later when you got all kinds of miracles in your shed…
I never mean to sound like anybody’s daddy on all this kind of stuff, but from running cruise for more than 50 years, I would rather say something than assume somebody has thought the same thing out.
As always, my two sets, I hope it helps