334.80 NM cable ampacity refer to 310.15 at 60degree C. You start with romex derating at 30 amps. 422.10A allows the use of table220.19. That table allows derating of load serve. GREAT. But, fpn #4 to table. The branch circuit load shall be nameplate rating.
If the ampacity at 100% is 32.8,then the 10 wire with no room for derating is not big enough. Unfortunatly you need to either disconnect a burner or rerun #8 nm on 35 cb.
Also, Has anyone noticed that Trane brand AC condensors for homes are coming at maximum fuse 25,35,or 45. Whe make life more difficult?
