I am replacing some ungrounded 50 year old 2 wire romex with Metal Clad flex cable and was hoping to use the boxes that are in place. They were installed in the 1960's, 2"x3"x2 1/4" in width, height, depth. As can hopefully be seen in the picture, there is a clamp with two openings and a tightening screw holding the romex in place.
Is using the clamp and screw up to code if used with MC or do I need to either switch out the box or
use a different connector in the same box? The wire is being fed from a crawlspace, the distance being about a foot from the crawlspace to the outlet. There are about 30 outlets that are identical and will need to be changed, so am trying to figure out the most efficient way to do this without having to damage the walls.
Is using the clamp and screw up to code if used with MC or do I need to either switch out the box or
use a different connector in the same box? The wire is being fed from a crawlspace, the distance being about a foot from the crawlspace to the outlet. There are about 30 outlets that are identical and will need to be changed, so am trying to figure out the most efficient way to do this without having to damage the walls.