randynavarro Posted August 21, 2007 Report Share Posted August 21, 2007 Nameplate on the condenser spec'd a max 50 amp fuse. Feeder was 40 amp. Is this a problem? May the breaker just trip more frequently? Quote Link to comment Share on other sites More sharing options...
hausdok Posted August 21, 2007 Report Share Posted August 21, 2007 Hi Randy, I think that if it's holding up and not tripping at 40 amps that it's just fine. It probably won't trip at all when the system is working fine, but it might begin tripping as the unit gets older and more worn and draws current above 40 but still less than 50 amps upon startup. If the feeder is only rated for 40 amps that could be a problem, when/if that occurs. Now, try and remember that, like you, air conditioners are, for me, like little green men. Expect Jim or someone from an area where they are common to come on here and straighten me out most rikki tick. ONE TEAM - ONE FIGHT!! Mike Quote Link to comment Share on other sites More sharing options...
Bill Kibbel Posted August 21, 2007 Report Share Posted August 21, 2007 Originally posted by randynavarro Nameplate on the condenser spec'd a max 50 amp fuse. Feeder was 40 amp. Is this a problem? May the breaker just trip more frequently? Most data plates list min. amp fuse/breaker as well. Quote Link to comment Share on other sites More sharing options...
randynavarro Posted August 21, 2007 Author Report Share Posted August 21, 2007 Bill, yes, the min. was 30 amp. What's your point? Quote Link to comment Share on other sites More sharing options...
Phillip Posted August 21, 2007 Report Share Posted August 21, 2007 Randy, The min is the smallest the breaker can be and the max. is the largest the breaker can be so the 40 amp would be all right. Quote Link to comment Share on other sites More sharing options...
randynavarro Posted August 21, 2007 Author Report Share Posted August 21, 2007 Originally posted by Phillip Randy, The min is the smallest the breaker can be and the max. is the largest the breaker can be so the 40 amp would be all right. Understand. I guess I wasn't clear on my question. Is a 40 amp breaker undersized give the potential draw of the unit? Quote Link to comment Share on other sites More sharing options...
Phillip Posted August 21, 2007 Report Share Posted August 21, 2007 Randy what was the running amps on the data tag and the size of the wire? Quote Link to comment Share on other sites More sharing options...
randynavarro Posted August 21, 2007 Author Report Share Posted August 21, 2007 Originally posted by Phillip Randy what was the running amps on the data tag Dont have it in front of me (I'm out in the field right now), but I recall somewhere in the low 20's? and the size of the wire? No. 8 copper Quote Link to comment Share on other sites More sharing options...
Bill Kibbel Posted August 21, 2007 Report Share Posted August 21, 2007 Originally posted by randynavarro Bill, yes, the min. was 30 amp. What's your point? You asked if having a smaller feeder than the max fuse specified was a problem. I guess my point was that it shouldn't be a problem , unless it was less than the min fuse size listed. Quote Link to comment Share on other sites More sharing options...
Terence McCann Posted August 22, 2007 Report Share Posted August 22, 2007 Originally posted by randynavarro Nameplate on the condenser spec'd a max 50 amp fuse. Feeder was 40 amp. Is this a problem? May the breaker just trip more frequently? Randy, put this one in the live box, it's a good write up regarding "Using MCA and MOP Ratings to Safely Connect Your Field Wired Air Conditioner" http://www.apcmedia.com/salestools/KSIH ... _R0_EN.pdf Quote Link to comment Share on other sites More sharing options...
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