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  1. #11
    Join Date
    May 2010
    Posts
    19

    Default Re: Wiring receptacle

    thank you for the info but i didn't know of any welder that uses a common to also run 110volt accessories like the wire feed etc. it was either a 220 volt or dc motor--on a 220 volt welder, different story for my 110volt smaller welding machine, so that there was no common wire. Also I wanted to be well informed before anything is done because when looking at the specs of the different size wire. primarily #8 and #6 copper the amp was only i think the # 8 was only 50 amps and the # 6 was 75 amps. I realize the the top end of amp usage and draw would be rare if not unlikely but I would not want an electrical problem down the road. I guess I was thinkin like You see the reccomendations when I first posted this as you see when using some machinery not to go over a certain distance for a certain gauge wire if you use an extension cord...ie 25 ft for 12 awg then if further it needs to be 10 awg...does that make sense. I just didn't want overheating in the wire and potential fire hazzard. Also most of the wire I am finding here is romex standed of either of these sizes 6or 8 - 2 or 3 thhn. is that a concern since if that does burn it is toxic

  2. #12
    Join Date
    May 2010
    Posts
    19

    Default Re: Wiring receptacle

    As a safety note would it hurt have #6 instead of #8 well other than wallet

  3. #13
    Join Date
    Jun 2007
    Location
    Shamokin, Pa.
    Posts
    645

    Default Re: Wiring receptacle

    Too bad you took offense, but the lack of info is frightening to posters on the board. And as we can't see your garage from where we all live, one wonders how to help when presented with so few facts. Glad to see you did post much needed info and answers were provided. Good luck with your project.
    But I stand by my first post and hope you hire this one out to a pro.

  4. #14
    Join Date
    May 2010
    Posts
    19

    Default Re: Wiring receptacle

    I truly aplaude caution and concern because no one wants anyone to blow something up or worse yet lose a life due stupidity. I guess it was the way that everything was said that was nerve racking..it was like I was being talked about versus to. and insted of comments questions are better.

  5. #15
    Join Date
    Jun 2007
    Location
    Fayette County, Ohio
    Posts
    5,826

    Default Re: Wiring receptacle

    The ampacity of #8 copper is 72 amps. NEC restrictions have a rather large safety factor built in. You specified a Nema 6-50R which is a 50 amp receptacle, following NEC code you can not go above 50 amp for breaker. Using #6 wire will work but will afford you no benefit. Length of run and load do have to be considered but generally only after about 100 feet.
    Jack
    Be sure you live your life, because you are a long time dead.-Scottish Proverb

  6. #16
    Join Date
    Jun 2007
    Location
    Fayette County, Ohio
    Posts
    5,826

    Default Re: Wiring receptacle

    Engineering chart used for chassis wiring for #8 copper 72 Amps. NEC rating has a built in safety margin because it allows for significantly long runs, improper installation, etc.

    Jack
    Be sure you live your life, because you are a long time dead.-Scottish Proverb

  7. #17
    Join Date
    May 2010
    Posts
    19

    Default Re: Wiring receptacle

    I have one more question, really more of just an explanation. I have understood romex to be typically solid core wire sheathed together for running circuits. I have always been told that it should not be run in conduit because of heat build up. I found some stranded thhn in different gauges 6 and 8 with anywhere from 2 to 3 conductors plus ground sheathed together labeled romex as well. is that just name brand then or does that mean this also should not be ran through conduit.

  8. #18
    Join Date
    Jun 2007
    Location
    Shamokin, Pa.
    Posts
    645

    Default Re: Wiring receptacle

    Quote Originally Posted by swadedvm View Post
    I have one more question, really more of just an explanation. I have understood romex to be typically solid core wire sheathed together for running circuits. I have always been told that it should not be run in conduit because of heat build up. I found some stranded thhn in different gauges 6 and 8 with anywhere from 2 to 3 conductors plus ground sheathed together labeled romex as well. is that just name brand then or does that mean this also should not be ran through conduit.
    Romex can be solid or stranded copper, it depends on the {size** AWG being used for the purpose intended. Say you have 12/2 the most common size in residential use, it would be solid. Now say you have 6/3 that would be used in a typical wired 50 amp circuit {for a larger range unit**, it would be stranded. But both would be considered Romex. The name was a brand name that morfed into a generic tern for house wiring.
    Can you run Romex in conduit, yes.
    DO I run Romex in conduit, 99% of the time no.
    Mainly because stranded single cable THHN or THHW, when priced per foot would be much more economical that Romex of the same gauge.
    Does local code require EMT for the run, if not you may be able to run Romex that you do have.
    Last edited by Ernie_Fergler; 06-11-2010 at 05:37 PM.

  9. #19
    Join Date
    May 2010
    Posts
    19

    Default Re: Wiring receptacle

    I appreciate your response but am not sure I asked it right. The wire packaging says romex but also thhn. So how do I determine which it is. Or would you pull the sheathing off since most romex, from what I understand, is thhn inside and use it as thhn since around here it is hard to find plain stranded thhn of that gauge here

  10. #20
    Join Date
    Jun 2007
    Location
    Fayette County, Ohio
    Posts
    5,826

    Default Re: Wiring receptacle

    THHN (Thermoplastic High Heat-resistant Nylon-coated) refers to the colored plastic coating on the individual wires. Romex is a cable or bundle of wires and usually consists of a bare ground wire and 2 or more THHN coated wires. You can also buy rolls of individual THHN coated wires. They are usually used if conduit is used because it is cheaper than Romex.

    Larger wires are usually stranded because stranded is more flexible than solid wires the same size.

    Personally I prefer using UF cable in a garage.
    Jack
    Be sure you live your life, because you are a long time dead.-Scottish Proverb

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