Bundled Cables

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AC and MC to NM

AC and MC to NM

That is exactly what I am trying to do. Otherwise, if I am to drill a hole through a wood member to feed down to my panel, I cannot drill, say a 2 inch hole, and install several NM cables without an Adjustment factor.
 
That is exactly what I am trying to do. Otherwise, if I am to drill a hole through a wood member to feed down to my panel, I cannot drill, say a 2 inch hole, and install several NM cables without an Adjustment factor.
If the cables are only "bundled" where they pass through the framing member and the hole in the framing member is not draft or fire caulked, you do not have to derate.
 
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