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  1. Canadian Electrical Forum
    I just did my sub elec room, and sec/tel room in slab. I had 6 - 2 inch emt 90's stubbing down, 6- 3 inch emt 90's stubbing down into these rooms. for a 2 inch 90 i drilled a 3 inch hole, and 3 inch i drilled a 4 inch hole so when the forming was stripped the conduits were not damaged. The...
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