Biil: See Section 300-15(f) Fitting. A fitting identified for the use shall be permitted in lieu of a box or conduit body where accessible after installation and not containing spliced or terminated conductors.
and the NECH Commentary:
Where a cable system makes a transition to a raceway to provide mechanical protection against damage. Section 300-15(f) permits the use of a fitting instead of a box. For example, where nonmetallic-sheathed cable that is run overhead on floor joists and drops down on a concrete wall to supply a receptacle needs to be protected from physical damage, a short length of raceway is installed to the outlet device box. The cable sheath is removed for the length of the raceway. The cable is then inserted in the raceway and secured by a combination fitting that is fastened to the raceway.
PS: Use of the correct fitting will allow visual inspection of the "redhead"
Joe Tedesco, NEC Consultant