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The previous owner left eight 10' sections of 3/4" EMT, but he drilled holes through every one of them (a hole every 18-24" or so). Can this still be used to route wire indoors?

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Congratulations. You have a bunch of 18-24" chunks of 3/4" conduit. You do not have 10 foot chunks of conduit. Unless you have mechanical plans (I've seen folks do small greenhouses with conduit) might as well cut them at the holes.

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  • That's what I figured (too good to be true). Do you know the rationale behind this? My guess is dust etc. can get in through the holes and create a fire hazard.
    – tnknepp
    Commented Oct 29, 2020 at 22:40
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    they should have exactly two holes in each piece.... one in each tube end (humor)
    – mark f
    Commented Oct 29, 2020 at 22:58
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    Also insulation damage - holes have burrs which can be sharp.
    – Ecnerwal
    Commented Oct 29, 2020 at 23:14

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