Doing another job for multiple items. Several 60 amp single phase 220V branches,Couple 70 amp same, and a 50 amp same. No special request for copper or alum and i'm in a competitive bid situation as always. Mostly machinery, motors, etc...and setting up 50-70 amp outlets. I default on planning Aluminum for these items unless copper is requested. Is everyone else in agreement on this thought process ? Any diehard "copper only" people still out there?