Results 1 to 7 of 7

Thread: breaker tripping

  1. #1
    Join Date
    Jun 2010
    Location
    erwin, tn
    Posts
    2
    Post Thanks / Like

    breaker tripping

    my shop has a subpanel that is ran off of my dad's house's service panel. it has 6 gauge cable ran from a 20 amp breaker in his panel to the shop. it is probably 100-150 feet from one panel to the other. i have a 220 plug on a 20 amp breaker that i run my century 230 ac stick welder off of. i trip the breaker all the time. what size braker do i need and am i safe running the welder off of that 6 gauge cable ran that far. keep in mind my whole shop runs off that 6 guage cable.

  2. #2
    Join Date
    Feb 2008
    Location
    North of Philly
    Posts
    20,241
    Post Thanks / Like

    Re: breaker tripping

    Not a surprise the 20 amp breaker trips. Most of those 230v buzz box stick machines want a 50 amp breaker to run full out. Many guys get away running a 30 amp breaker (like a dryer circuit) and running at lower settings. I'm honestly surprised that you can accomplish anything with a 20 amp breaker.

    If I remember right, 6g wire will run 50 amps for the whole shop. My concern would be if there is anything else in the run thats under rated, so thats why they tossed in the 20 amp breaker. If the set up would take it, I'd run the 50 amp in the main panel, then a seperate breaker in the sub panel for the machine, with breakers for lights, outlets etc. I'd probably run a 30 amp for the welder, simply to avoid overloading the 50 at the house and tripping everything at once. Thats not hard to do if you are running a fair number of lights ( the 2 or 3 twin 500 watt Halogen work lights are usually our biggest culprit working at night), add in the chop saw or grinder while some one welds at high amps and "Thar she blows!"

    One of the sparkys will probably chime in and let you know if code will let you run a bigger breaker on the 6g or not. I can't remember what size you need for a 60 amp breaker right now.
    .



    No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth!

    Ronald Reagan

  3. #3
    Join Date
    Jul 2005
    Location
    Marshall, Tx
    Posts
    139
    Post Thanks / Like

    Re: breaker tripping

    Not sure what kind of wire you have but one of the most common is THHN which is actually good for 75 amps. 150 feet should not be an issue for voltage drop.
    Yes I can tack it for you. I know that won't hold but that is what you asked me to do.

    Millermatic 350P XR Aluma-Pro push/pull
    Millermatic 185/spool gun
    Miller Dialarc 250 HF Water cooled
    Thermal Dynamics Plasma

  4. #4
    Join Date
    Jun 2010
    Location
    maryland
    Posts
    113
    Post Thanks / Like

    Re: breaker tripping

    Quote Originally Posted by got aluminum View Post
    Not sure what kind of wire you have but one of the most common is THHN which is actually good for 75 amps. 150 feet should not be an issue for voltage drop.
    my lincoln 125 welder trips the braker all the time! and its on a 20 amp

  5. #5
    Join Date
    Jun 2010
    Location
    erwin, tn
    Posts
    2
    Post Thanks / Like

    Re: breaker tripping

    thanks for the help. i will look at the cable to see what type it is. i work alone, so i don't have to worry about anybody turning anything on. the only other thing on while i am welding is my stereo and 6 t-12 fluorecent lights.

  6. #6
    Join Date
    Dec 2007
    Location
    Los Angeles
    Posts
    7,808
    Post Thanks / Like

    Re: breaker tripping

    Quote Originally Posted by moneymaker17 View Post
    my lincoln 125 welder trips the braker all the time! and its on a 20 amp
    Is this a question?

    If you run a Piece of equipment on a certain size breaker i.e. 20amp and it trips the breaker, it is clearly indicating the need to install a Bigger CB and wire accordingly.

    I don't understand why you quoted Got Aluminum's post about the wire being able to handle 75amps.
    Ed Conley
    http://www.screamingbroccoli.com/
    MM252
    MM211 (Sold)
    Passport Plus & Spool gun
    Lincoln SP135 Plus- (Gone to a good home)
    Miller 125c Plasma 120v
    SO 2020 bender
    Beer in the fridge

  7. #7
    Join Date
    Jul 2005
    Location
    Marshall, Tx
    Posts
    139
    Post Thanks / Like

    Re: breaker tripping

    Quote Originally Posted by Broccoli1 View Post
    Is this a question?

    If you run a Piece of equipment on a certain size breaker i.e. 20amp and it trips the breaker, it is clearly indicating the need to install a Bigger CB and wire accordingly.

    I don't understand why you quoted Got Aluminum's post about the wire being able to handle 75amps.

    Thanks for saying bigger CB abd wire accordingly. It is amazing how many people will put in a bigger breaker because it is tripping but not change the wire size. Here comes the fire.
    Yes I can tack it for you. I know that won't hold but that is what you asked me to do.

    Millermatic 350P XR Aluma-Pro push/pull
    Millermatic 185/spool gun
    Miller Dialarc 250 HF Water cooled
    Thermal Dynamics Plasma

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Page generated in 1,603,243,841.21016 seconds with 10 queries