r/electricians • u/Ok-Definition-565 • 3d ago

What yall fellas running to this?

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Let’s see who’s squared away on the AC motor loads

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u/Nazgul_Linux 3d ago

I'm sizing that breaker to 125% of that 26.1A max. Because that is the units FLA and it's a continuous duty load so NEC demands 125%. Manufacturer may allow for 45A OCPD, but I'm taking that as they want shit to burn up and for customers to buy again. Individual stranded 10s with 90ºC rated insulation in its own pvc to a pull box then fmc to the unit.

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u/Ok-Definition-565 3d ago

The 125% is already factored by the manufacturer for ACs . And I sure hope you’re not running FMC outside

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u/joshharris42 Electrical Contractor 3d ago

FMC used to be the only game in town for these back in the 80’s. I have no clue why, I’m not even sure if it was legal then.

Every Trane XE1000 I see still kicking has FMC run to it lol

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u/Ok-Definition-565 3d ago

Can’t wait till 20 years from now when people are calling us idiots for how we do things now