Originally Posted by Bohemian
The air conditioner never quite got happy. There was no 30 amp circuit available. At first too much extension cord was suspected, but even plugged directly into 15 amps with an adapter it still wouldn't seem to go. I didn't experience any of it, but it was something like the sound cycled every 15 seconds, or something - in trying to determine if the compressor was getting started and staying started. It never cooled, that was pretty clear.
With a lot of extension cords I can see the voltage dropping to a problematic level without blowing a fuse. But when plugged in directly, I would think it would blow the 15 amp breaker or work. I don't know. It told them to accept it anyhow and we'll see I guess.
My best guess is that there's nothing wrong with the air conditioner. Sounds like it's trying
to start, but the voltage at the trailer is dropping too low and the brownout protection is tripping out.
The reason is, in addition to the smaller breaker
, the 15 Amp branch circuit is run with smaller wire
. A 30 A branch circuit uses #10 wire; a 15 A branch circuit uses #14 wire. Big
difference. If the A/C draws a starting surge of, say 25 A for a few seconds, it may not trip the 15 A breaker--which incorporates a time delay to prevent nuisance trips--but the voltage will drop quite a bit because of the #14 wire.
Boy, you're right, that truck is overkill! I'm with you--there's no payback on a diesel any more, with diesel fuel selling for so much more than gas.