1. Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!
  2. ALL NEW MEMBERS READ THIS FIRST!! Thank you for joining Heavy Equipment Forums! If you are new to forums we communicate with "Threads", please search our threads to see if your topic may have already been answered and if not then click "Post New Thread" in the appropriate forum. This will allow all of our members to see your question and give you the best chance to be answered. After you've made a number of posts you will graduate to Full Member status where you'll see a few more privileges. Following these guidelines will help make this the best resource for heavy equipment on the net. Thanks for joining us and I hope you enjoy your stay!!

OOPS..someone forgot to mark out the utilities...

Discussion in 'Safety Issues' started by Hobbytime, Jul 31, 2017.

  1. Birken Vogt

    Birken Vogt Charter Member

    Joined:
    Nov 30, 2003
    Messages:
    3,723
    Location:
    Grass Valley, Ca
    Well it is more than just jumpers but with this kind of power if 4/9 were not able to be hooked up right away then either they hired the wrong rental company or somebody at the utility needs to be re-educated.

    Maybe it was the same guy who marked out the cables.

    Or maybe the news got that story wrong as well.
     
  2. Shimmy1

    Shimmy1 Senior Member

    Joined:
    Aug 14, 2014
    Messages:
    3,122
    Location:
    North Dakota
    Electricity takes the shortest path to ground. In this case, the end of the casing as it went through the cable. Same goes for a horizontal drill. An excavator or backhoe would be capable of being dangerous to someone in close proximity to it, since the bucket could pull the cable up out of the dirt, and leave the tracks or stabilizers (and possibly a bystander) as a potential.
     
  3. Hobbytime

    Hobbytime Senior Member

    Joined:
    Sep 22, 2016
    Messages:
    715
    Location:
    usa
    I knew that first part..I would just think for added protection there was some device or protective gear that would protect the operator in case they hit electric and it didnt ground out at point of contact..
     
  4. Delmer

    Delmer Senior Member

    Joined:
    Jan 4, 2013
    Messages:
    7,112
    Location:
    WI
    Like what? a GFCI sensor tied back to the nearest substation? If the operator is in a cab they're relatively safe. The "boots on the ground" are the ones in danger, not too much that can be done to protect them, besides keeping they're feet together and don't touch anything.
     
  5. Birken Vogt

    Birken Vogt Charter Member

    Joined:
    Nov 30, 2003
    Messages:
    3,723
    Location:
    Grass Valley, Ca
    Most of the time, a line of this class will have a ring of grounded shield conductors around the live conductor in the center so it will ground itself out and short to itself and trip the protection before current flows elsewhere. But when you are talking about power of this magnitude, even a little bit of leakage that didn't get trapped can still be deadly.

    Look at it another way, 120 volts can be deadly but if a little leakage led to 1/10th of that being touched that would be 12 volts and not generally hazardous. However if this is a 69,000 volt line, or more probably a 138,000 volt line then a tenth or even a hundredth of that would still kill you quite dead.