Don-

For my particular job Article 525 applies. I looked in my 2002 McGraw-Hill's NEC Handbook on page 1169 and read: "(C) all other receptacles, of any voltage or current rating, must be protected by a GFCI. This of course is in reference to NEC 525.23(C). This leads me to believe my 240V, 50A. receptacles must be GFCI protected.

Frank