Plasma cutter question about grounding

Discussion in 'Garages, Workshops & Tools' started by Aceshigh, Aug 4, 2011.

  1. Aceshigh

    Aceshigh Veteran Member Lifetime Gold Member

    26,757
    1
    Apr 9, 2001
    Boondocks
    Okay here's a stupid question......

    My neighbor DIRECTLY on the other side of my wall has his utility box there
    next to mine. So if he has HIS OWN ground rod next to mine, this isn't an
    issue with the ground loop problem but me doing a 2nd ground rod 15 feet away is ??

    So this star topology thing would imply they'd have to be connected somehow to be safe.....correct??
    I know there's more ground rods 40-50 feet away too......or less.

    This is why I'm confused to all hell. :crazy:
     
  2. BTTB71SS

    BTTB71SS Veteran Member Lifetime Gold Member

    4,798
    1
    May 10, 2006
    Harris, MN
    Are you sure that you both have separate ground rods or are you sharing since you say that he is on the other side of you. Can you see the ground rod or the run to it
     
  3. K5JMP

    K5JMP Veteran Member Lifetime Gold Member

    his service entry is right next to yours.. he has a single point ground at the entry point. this is correct.

    lightning doesn't necessarily have to hit your abode to be a problem to you. there is an effect called ground swell caused by nearby strikes that can ruin your day in a multi-point scenario.

    I wish I still had the .gov standard manual... it was around 1200 pages in a pdf. lightning is not a simple subject (it was on my computer at work).
    you need to give it one single, direct path to ground. it doesn't like making sharp turns, or having to make choices.. or multi-point grounds that have a potential between them. it will always take the lowest resistance path to earth ground...

    just trust me on this.. dig in a wire from the shop to your service entry rod. or better yet.. tie it to a ground coming into the garage from your grounded service panel... no loops and only 1 path that way

    in the end.. the reality is chassis ground is a safety issue... not a lightning issue. but you need to adhere to proper theory to cover all the bases and not create problems for yourself if you do take a strike.
     
  4. Aceshigh

    Aceshigh Veteran Member Lifetime Gold Member

    26,757
    1
    Apr 9, 2001
    Boondocks
    Okay , turns out my quad townhouse doesn't have ground rods.
    My neighbor does electrical work on the side.

    Our outdoor utility boxes run a ground wire under the slab into the center
    of the quad to our utility room 25 feet to the center in the garage for each unit.
    So there's no ground rods outside, it runs to the water main in the utility room.

    He said the samething, just ground it to the water main in there as well
    and run a 20 foot 10-12 gauge wire to the Plasma cutter.
     
  5. K5JMP

    K5JMP Veteran Member Lifetime Gold Member

    there you go..:innocent:

    a quad huh... yeah, you really do need to move.. sharing walls sux
     
  6. Aceshigh

    Aceshigh Veteran Member Lifetime Gold Member

    26,757
    1
    Apr 9, 2001
    Boondocks
    Nah, all my neighbors rock.

    They're all late 20's, 30's. Plus I'm the Kingpin here. :cool:
    My young 25 year old neighbor is a H.S. foot ball coach and
    while I was out of town he resealed our driveway for me.

    I gotta toss him some loot for the supplies still.
     
  7. Marks71BB

    Marks71BB Veteran Member Lifetime Gold Member

    Its likely a Ufer ground
     
  8. K5JMP

    K5JMP Veteran Member Lifetime Gold Member

    your skillset/knowledge base continues to amaze me...
    kudo's bro.. that is an obscure, but on the money reference.
     
  9. Marks71BB

    Marks71BB Veteran Member Lifetime Gold Member

    I like the way you had Ace chewing on foil. LMAO

    Thank you for the kudo's ;)

    I WAS a construction inspector if you recall.
     
  10. Aceshigh

    Aceshigh Veteran Member Lifetime Gold Member

    26,757
    1
    Apr 9, 2001
    Boondocks
    Good call, that might just be exactly what it is.
     

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