wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
It sounds like the quote you provided suggests that you include the 10 kW heat in the final total, and you also include 25% of the 5HP A/C motor's 28A FLA, or 7A, in the final total, even though the 5 HP A/C motor's load is not part of the final total.
I would say that the language in 2020 NEC 220.60 is sufficiently unclear that it is not inconsistent with that interpretation. However, I would also say that is a stupid interpretation. I would instead include an extra 25% of the largest motor other than the A/C motor.
The issue that I see the second sentence of 220.60 as addressing only arises when you have say two non-coincident loads, say a motor and a non-motor, and 100% of motor FLA < non-motor load < 125% of motor FLA. Then you need to look at the other loads on the feeder to figure out whether to consider the motor at 100% of its FLA or 125% of its FLA in making the comparison to decide which load is the largest.
Cheers, Wayne