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Thread: Wire pull

  1. #1
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    Wire pull

    Say you making a pull from a panel to an ats how would you make the pull[where would you setup reel] from? Ats or panel? Thanks

    Edit: I would imagine real would be setup at panel. What of it were long and you had a pull box in the middle....obbiously couldn't setup a real on that end.

  2. #2
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    Pull direction isn't determined by equipment category. Sometimes elevation difference, sometimes workspace, perhaps something else...

    A pull box in the run somewhere gives another location to pull from. I've been a part of the pull team for several middle of run pulls.
    I will have achieved my life's goal if I die with a smile on my face.

  3. #3
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    Pull force can also be different depending on the direction of the pull.

    Straight sections of pull add force from friction caused by the weight of the cable on the conduit wall, but bends act as force multipliers, since the friction force is caused by the cable tension going around the bend. So if there are more bends on one side of the run you _probably_ want to pull from the other side (do the calculations).

    If one side has a bend positioned so that the cable can be pushed in, you can take the tension off that bend and almost remove it from adding pull force.

    -Jon

  4. #4
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    If it's just one pull, I would set up where most convenient. Multiple pulls are at the panel, or in the case of v/d/v wire, usually the hallway outside the electrical or IT room, then backfeed enough cable to get to patch panels, 110 blocks, etc.
    Electricians do it until it Hertz!

  5. #5
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    Quote Originally Posted by JFletcher View Post
    If it's just one pull, I would set up where most convenient. Multiple pulls are at the panel, or in the case of v/d/v wire, usually the hallway outside the electrical or IT room, then backfeed enough cable to get to patch panels, 110 blocks, etc.
    What exactly do you mean multiple pulls are at the panel? The pulling happens at the panel or the reel is setup there?

  6. #6
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    Quote Originally Posted by mstrlucky74 View Post
    What exactly do you mean multiple pulls are at the panel? The pulling happens at the panel or the reel is setup there?
    The reels are set up there. No one is going to set up reels at a box to pull to the panel, then move them to the next box to pull to the same panel, repeat ad infinitum. Set up reels at the panel and pull from there.

    With free run (not in conduit) v/d/v, it's often a short 90* pull into an IT or electrical room, so the reels/boxes are set up in the hallway outside to avoid needing another set of hands to navigate that 90*. After the wire is in the box on one end, we measure off how much extra wire needs to pulled off the reels/boxes to reach the IT eqpt, and typically backfeed it 15-40' to reach that eqpt. The wire is set up at the 90* point so that there are basically 2 straight* pulls vs one longer one with a turn in it.

    v/d/v wiring is a fair amount different than pulling in #12 in a conduit or 500MCM mains in 4" PVC. But with multiple pulls, you dont want to move the wire around when you are pulling it to a common point (a panel); you put the wire at the panel(s).
    Electricians do it until it Hertz!

  7. #7
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    Quote Originally Posted by mstrlucky74 View Post
    What exactly do you mean multiple pulls are at the panel?
    He's talking about a new panel where you have several circuits to pull that are the same size.
    I will have achieved my life's goal if I die with a smile on my face.

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