Electrical...Do i Got This Right?

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I want to install a 220 outlet in the shop this weekend. From what I've searched out this is what I think the game plan should be. Set me straight if needed.Nema 6-50R receptacle.(2) #6 AWG THHN wire power (1) # 8 AWG THHN ground. Neutral not required (?). Will be installed very close to power panel which is 100 amp service. Use 50 amp double pole breaker (?). 3/4" conduit to 4 3/4" square x 1 1/2 deep receptacle box. I have the wire, conduit and box as stated. Still have to buy breaker and receptacle.Also have about 30 feet of 8/4 SO cord for an extension. Would 6-50 receptacle and plug be the way to go for the ends of the extension? The neutral wire of the 4 wire cord not used?No specific equipment it's needed for at the moment but I really need to get a welder set up and looking toward at least a 187 class wire feeder or maybe a stick welder with fair capacity.Thanks for any help before I dive in this weekend.AlA man is judged by what's between his legs...always ride a good horseMiller DialArc HFLincoln Classic 300DThermal Arc 181iPowermax 45Scotchman Ironworker(2) BridgeportsOkomota Surface GrinderAutoCAD 2010
Reply:Sounds about right.But you might want to run four-wire from the panel to the box and just cap-off the currently unused fourth wire.  This way you have that fourth wire in place if you need it down the road.  Unless the run is so short and access is so easy that it would be no problem to pull a fourth wire if you need it down the road sometime.However, double check your locale's regulations regarding electrical work. In the Chicago area, no except a licensed electrician is permitted to do electrical work.  There is no exemption for a homeowner to do electrical work on their own property in Chicago-land like there is in -most- of the rest of the US.  I don't know if Custer Park does or does not allow homeowners to do electrical work in their own single-family dwelling.Also, even with the 'homeowner allowed to do electrical work in their own single-family dwelling' exemption, there are still the usual requirements to get an electrical work permit and the associated fees and inspections.And also, when you say "in the shop", do you mean a commercial/industrial shop or just your own homeowner's garage/shop?  Because ALL electrical work in commercial/industrial settings (or anything other than a single-family owner-occupied dwelling) has to be done by a licensed electrician.Be safe.  The best laid schemes ... Gang oft agley ...
Reply:Here is an Extension cord I made for my genset with the 6-50R and metal box. Pick up a Strain relief also- everything available at Home Depot.Ed Conleyhttp://www.screamingbroccoli.com/MM252MM211 (Sold)Passport Plus & Spool gunLincoln SP135 Plus- (Gone to a good home)Klutch 120v Plasma cutterSO 2020 benderBeer in the fridge
Reply:Nema 6-50R receptacle.(2) #6 AWG THHN wire power (1) # 8 AWG THHN ground. Neutral not required (?). Will be installed very close to power panel which is 100 amp service. Use 50 amp double pole breaker (?). 3/4" conduit to 4 3/4" square x 1 1/2 deep receptacle box.
Reply:the raco number for the garvane cover[raco's wording is "exposed work cover"]  878.dave.
Reply:Thanks guys. This residential stuff is different. I work with industrial electricians and their answer is usually " I don't do much residential stuff". Actually, I've spliced and terminated up to 13.2k in my younger days but the engineering was always already done.I'm gonna pick up a 2 1/2" deep box and a strain relief for the cord. Good ideas.MoonRise -  We live close enough to that God forsaken area called Chicago to know what that place is like. This is just for my own personal shop area in my pole building. We have county inspectors and all that. But we live out in the country and tend to be a little more independent natured. Them city boys get their pretty shoes all dirty out here in the country so we try to be nice and not call them too often.Appreciate all the help.A man is judged by what's between his legs...always ride a good horseMiller DialArc HFLincoln Classic 300DThermal Arc 181iPowermax 45Scotchman Ironworker(2) BridgeportsOkomota Surface GrinderAutoCAD 2010
Reply:Oh yeah, as mentioned a deep box is almost always better than a small shallow box.  Those 'bigger' wires don't bend all that easily into small spaces.  And it's all well and good to 'avoid them city inspector folk'   , but if the 'rules' say you have to have them then you have to deal with them.  Shrug.  If you don't 'have' to have electrical work permits and inspections, then that's fine too.  It's not rocket science or brain surgery, but electricity doesn't tolerate fools or screw-ups.  Be safe, that's all.    The best laid schemes ... Gang oft agley ...
Reply:I would suggest using a NEMA 14-50R (4 prong) receptacle instead.  Those include the neutral line so you can also get a couple 120V circuits out of that if needed.  Also, if you need to splice heavier than 10 gauge wire, Polaris connectors work much better than wirenuts.Electronics Engineer (embedded controls)Miller 200DX w/ Coolmate 3Thermal Dynamics 82 plasma cutterGrizzly G0678 8x30 millPM1440BV 14x40 latheHF 6x12 surface grinder