Adding a 20 amp subcircuit (120V) to furnace room to turn it into a workshop. Initially it will have one duplex and 2 fourplex receptacles, the fourplex receptacles will be on cement walls, the duplex will be on a stud.
I know that for the duplex I just need to staple the cable back far enough so that if someone ever puts drywall up there will be no danger of hitting the wire with a drywall screw.
Section 334.15.c of the NEC 2011(which the state of MI uses) says
…Nonmetallic-sheathed cable installed on the
wall of an unfinished basement shall be permitted to be
installed in a listed conduit or tubing or shall be protected
in accordance with 300.4.
I'm assuming they mean UL Listed conduit or tubing, which the smurf tube I'm looking at is. Am I correct in this assumption? Also, is this common practice, using ENT on exposed walls to a metal box? I know that the metal box (and metal tubing if I used it) has to be grounded, just making sure I'm not being too unorthodox with solution, or going against code.