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Fair point on #2, it could have been better said. As you point out, a dead short isn't too much of a concern, where the resistance is a small fraction of ohm. For example, if the only resistance in the short circuit was a hundred feet of number fourteen wire, which has a resistance of about...

I agree with this, in nominal conditions. The imbalance in current is nothing to worry about in a single phase 220 system. The current carried by the neutral is *nominally* only that of the water cooler. Two specific concerns warrant running a substantial neutral: 1. Someone plugs...

For single phase 220, one doesn't need to worry about imbalance, just the total current in each of the legs. Scsmith42's suggestion about adding a 15A circuit breaker on the welder is a good one. You don't want a 120 receptacle capable of sourcing 50 Amps. The neutral from the outlet to the...

This is good advice. I have a 400A service entrance. The meter/main breakers on the exterior wall of my shop. I put a 200A subpanel directly behind it and ran the feeders through a 2" conduit ******. If you go this way, it's worth the time to place both of them back to back and figure out...

A lot of great suggestions here. Some thoughts: 1. Along the lines of what aandpdan suggested, I have 8 120 volt circuits in my garage (44x21) wherein the adjacent outlets are wired to successive circuits (modulo 8). That way if I am working in a particular area with lots of things plugged...

Great advice by 2manyprojects. I would definitely go with more lights, 4 footers, and spread them out. The big challenge is getting rid of the shadows. I use 22, 4' dual bulb T5HO lights wired in three circuits in my 940 square foot garage. The lights on each of the circuits are evenly...

Grind. I rented a grinder with a diamabrush on it from Home Depot and ground the floor wet. I had a helper with a hose and the shop vac getting the floor wet in front of me and rinsing and vacuuming the floor behind me. Suggest doing it in sections of about 100 square feet or so. The whole...

Hi Shea, Thanks for the pointer. I wasn't aware of these -- the manufacturer recommended a different type of roller; which are conventional and designed for epoxy. I think this might be the trick. If I ever do this again, I will get one. The epoxy coat bubbled up last night as before...

Thanks Scotty for the feedback. I don't know what to make of mixing and what high speed is. I had my drill on low -- does this count (jk)? Can you educate me on "porcupine" rolling? For the smalller batches, the mix burped and laid down (and boiled) beautifully. With the larger batches, I...

An update It's better, but there are still some bubbles. Hopefully they will lay down tonight. It seems to work well for small batches -- something like half a gallon works very well. The epoxy flooring expands a LOT -- close to 10:1. In the smaller batches, I could get it to burp and lay...

You are correct, there is outgassing of water vapor from the slab. What I was referring to is removing air from the epoxy coating mix along the following lines: Cheers, Bob

I run my TIG welder (Miller Aerowave) off of my rotary phase converter; I have been doing it for more than a decade. The reason I do so is that it can produce higher currents on 3 phase (375A versus 250A for single phase). I do have a pretty good sized RPC (GWM Digi 286, which is based on a 30...

Hi, I'll be putting down the epoxy color coat in my garage late this afternoon. Last time, I ended up with lots of bubbles, perhaps due to air getting entrained in the epoxy during mixing. I probably should have waited until later in the afternoon as well. I have no reason to think that...

Thanks for the help guys. My original setup had a dedicated ground wire without splice to the cold water pipe in house from main plus a ground wire from the main panel to the subpanel in the house. It seems like this is still the way to go. So do I understand correctly then that I size the...

Hi, I am getting some information from the building department on grounding requirements that I don't understand and want to know if I am missing something. I have a 400 amp main panel on my detached shop. It has 2 200A main breakers that feed two subpanels, one inside the shop and one...

I certainly have not read all of the posts on the subject on GG, but I have read several hundred or so. The old Craftsman compressor isn't oil-less and something I'm not committed to keeping. It just continues to work. As far as budget, I'm thinking less than 2k. Bob

Greetings, I am looking for an air dryer and (longer term) a compressor for the shop. It will see intermittent use. I am mounting my compressor behind the shop in a small outbuilding for noise and space considerations. I have a 20 year old 5 horse, 30 gallon Craftsman compressor. I...

Wow. Great information here, thanks! I have spent a lot of time on Bill Pentz's web site. It's fantastic. The part I was having a hard time reconciling was his suggestion to vent outdoors and the Wynn filters he sells with the kits. Are the filters good enough? My heater has separated...

Hi, I am planning on adding a dust collector to my new shop for the woodworking tools. I am giving thought to mounting the dust collector outside for reasons of space and to (potentially) avoid the fine dust that might escape the filter. I'm located in the Bay Area, CA. The shop will be...

Hi, It's based on a 20 HP, NEMA 256 motor. It was made by GWM and the model number is Rotogen 256. Thanks, Bob