Condensing Unit Overcurrent Protection

02, Sep. 2024

 

Condensing Unit Overcurrent Protection

I always have mixed feelings about what everyone considers "Overload" protection when it comes to your standard outdoor
condensing unit. Although I agree with eveybody else that installing a smaller guage wire and a larger short circuit protector is generally
allowed on a motor load with true overload protection such as Overload Heaters installed in conjunction with an actual motor starter.

I've always felt that a simple 2p contactor along with the thermal overload switch on the side of a compressor found on most standard outdoor condensing units is not near as accurate an overload device to be able to compare it to a Starter with Oveload Heaters set
at a specific amperage at which they trip.

To me the thermal overload switch on the side of the compressors is more of a last line of defense just prior to a compressor
burning up rather than a dependable means of taking the compressor out of the circuit do to your general overload situation.

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