I am needing to fish about a dozen lengths of MC down a wall for some outlet boxes. The wall is a display wall and it is about 8' tall in an area with a 10' ceiling grid. I would like to run some 1/2" emt along the 2x4 top plate of the wall and at each location where the wire will drop down I would like to install a 4-S box mounted with its back against the plate. I would need to bore a 1" hole in the plate to have room for the MC connector to fit through. I have not done this before and wanted to make sure there were no rules prohibiting this. Does anyone know of any problem with this? Thanks.