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One hole straps - hole up or hole down?

Discussion in 'Electrical Engineering' started by Gerald Newton, Oct 12, 2004.

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  1. When running EMT on a wall parallel to the floor and using one hole straps
    for support should the hole in the strap be up (above the tubing) or down
    (below the tubing)?
    I always thought the hole was supposed to be up. But a lot of electricians
    have been putting the hole down. Someone told me the listing literature
    says the hole is supposed to be up.
  2. SQLit

    SQLit Guest

    Here abouts there is an thought that with the screw down it is stronger.
    Still relies on the clamp and screw to be solidly connect as a unit.

    So what do you do when the conduit is vertical?

    left or right?
  3. Actual experience shows that the screw up is stronger. When you pull down
    on the pipe with the screw down the strap bends where the arch meets the
    flat part of the strap and the pipe pulls away from the wall. With the
    screw up the pipe pulls into the wall because the arch of the strap is
    stronger than the arch to flat part of the strap. This may sound trivial,
    but believe me it is true. Anytime I see the screw down I know the
    electrician still has something to learn. The electrician that told me
    about the listing was a director of an apprenticeship program and electrical
    administrator that went to work for an electrical supply house and begin
    reading all the labeling and listing information he could find.
    Professionals place the screw up!
  4. Guest

    Neither. Insert the end with the hole *into* the wall to avoid
    silly questions. :)
  5. abuse

    abuse Guest

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