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Generally speaking, holes are usually OK, and notches are not. Notches are like ripping the edge of a piece of paper, which creates a weak point for potential fractures. As noted, the notch on the far right is nearly halfway through the beam, which means you'll have to sister it to repair it (assuming it can be done at all, might want to consult an engineer)....


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Fortunately, the abused floor joist still looks straight. If it happens to be sitting on a foundation/basement wall, it shouldn't be an issue. If it is not supported underneath, it would be a good idea to place a post under it. I wouldn't let the same electrician work on the house anymore.


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