Oversized Condenser Breaker

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1

Originally Posted By: roconnor
This post was automatically imported from our archived forum.


Related question about oversized AC system condenser breakers here:


http://www.nachi.org/bbsystem/viewtopic.php?p=160765#160765

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Robert O'Connor, PE
Eagle Engineering ?
Eagle Eye Inspections ?
NACHI Education Committee

I am absolutely amazed sometimes by how much thought goes into doing things wrong

2

Originally Posted By: Greg Fretwell
This post was automatically imported from our archived forum.


The sparky might not have had a 25a breaker on the truck but they are readily availlable

3

Originally Posted By: roconnor
This post was automatically imported from our archived forum.


SQD-QO-30A-Trip.pdf )


But I have heard from electrical designers that actual field conditions with older breakers could trip at between 150% to 200% of the rated load ... so that the possibility of the breaker not tripping at 2 times the rated load should be considered. Or is that just an old electrical engineer's wives tale.

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Robert O'Connor, PE
Eagle Engineering ?
Eagle Eye Inspections ?
NACHI Education Committee

I am absolutely amazed sometimes by how much thought goes into doing things wrong

4

Originally Posted By: Greg Fretwell
This post was automatically imported from our archived forum.


I have scoured artice 240 but I don’t see the exception “unless the Home Depot doesn’t have one” icon_wink.gif