Condenser feeder sizing

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Bearcat13

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Joined Sep 24, 2019

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1 Posts

Discussion starter · #1 · Apr 13, 2020

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I need to wire up a sub panel for two condensers and the electrician put 8/2 romex for feeder I can’t for the life of me find the formula for calculating if this is enough for two identical condensers with a MOCP of 30amps
and a minimum circuit ampacity of 18.7
With a RLA 14.1 amps and a FLA of 77


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kangaroogod

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Joined Aug 14, 2001

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3,498 Posts

#2 · Apr 13, 2020

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8/2 romex (60 deg conductor) would be placed on 40amp breaker in the main panel to the sub.

Each condenser would be wired using 12 gauge conductor and each having a 30a breaker per article 440 of nec.

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