I called my local supply house for a price on 6-3 NM-B (what I run @ work for a 50 A hot tub) and was told I could run 8-3 NM-B and still run 50 A OCPD. Table 310.16 says OK in the 75 deg column, and if you look @ 110.14 (C) (1) (a) (3) IMO I think he's right. Boss says no and to run 6-3. Any one elses opinion would be appreciated. BTW all of my termination points are rated 75 deg or higher.