I have a friend who just moved into a new Home. (just built). He paid the electrical contractor to install wiring for a future hot tub. He is finishing the basement and once the drywall goes up, its to late to make changes. The contractor installed a 50 amp circuit using 6-2 ser, aluminum wire. I think this violates the code. 680.42(c). Drywall is scheduled to go up this weekend. Am I right, or does this fall under another rule