I'm confused. Wait until the drywall is up? Seems like alot of extra work...

The reason is to protect the cables from the other trades. I like to get in as late as possible for this reason.

Whether or not you can use this approach depends on the construction. Normally you can do this in commercial construction with a hung or dropped ceiling. If you are lucky you may have the situation where the partitions are open above the ceiling with no top plate and no insulation. You can pretty much just drop the wire down the bay to your ring. Other times you will encounter top plates, sheetrock run all the way up and insulation. Even with insulation it's easy enough to fish. If you can, install a drag line before the rock gets hung. Then you have the best of both worlds.

-Hal


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