Help with conductor derating

[Jpflex]

Just to reiterate what Augie said, for an individual branch circuit, in conditioned spaces, neither the 80% limit nor the temperature correction apply. It's as simple as "non-motor load <= 15A; use a 15A breaker with #14 wire."

Cheers, Wayne

P.S. In the OP you have highlighted the lines for both the spectrometer and the water chiller. These are each getting separate circuits? Does either one use a motor?

There is one dedicated circuit required for what packet calls “ICP-OES”

However engineer recently asked me to install two dedicated circuits

 

[augie47]

If yoke has two receptacles on one strap even if hooked up to a single gang box, could this be considered “multi-outlet?” Yes the branch circuit only goes to a single box to from a single breaker circuit to be dedicated

If you used a duplex that would be multi-outlet. At 2.9kw you still fall in the 80% allowable but considering how close it is and the PF, I would lilely go with a #12 on a 20 amp OCP device.

 

[Jpflex]

If you used a duplex that would be multi-outlet. At 2.9kw you still fall in the 80% allowable but considering how close it is and the PF, I would lilely go with a #12 on a 20 amp OCP device.

I also saw in the NEC code book that if after conductor derating, if the ampacity does not correspond to a standard breaker you can use the next higher size if a max ampere limit

I hope this doesn’t mess me up on a test by allowing a conductor with a lower ampere capability on a higher sized breaker