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Posted by dpb on June 18, 2007, 4:57 pm
N8N wrote:
> wrote:
>> There are so many computers and air purifiers and television equipment
>> hooked up It's surprising my breakers aren't blowing all the time but...
>>
>> why would the main breaker blow? Seems like the individual breakers would go
>> first. A new AC compressor was just installed and there is something weird
>> because one of the other breakers for "lights" or something stops the AC
>> when it is tripped. The actual AC breakers trip the AC too.
>>
>> Tia, : -)
>
> Is it possible that the *control* for the A/C is on a lighting branch
> circuit?
Hardly. Any central A/C would require 240 and 30A+ and I've never seen
that kind of a lighting circuit in a residence. Unless, of course, some
_real_ doofus mixed stuff all up and has multiple wires connected to a
breaker or some other really, really weird stuff. But, even then, any
lighting circuit would normally be only 15A or 20A max, not enough to
keep from tripping...
> It is possible, especially if you have a lot of breakers, that if the
> A/C goes on it might be pulling only 30A on a 40A breaker but the
> cumulative load of everything in the house would be over 150A or
> whatever your main breaker is...
That's certainly possible, and I'm guessing the new A/C was the straw
that the camel wasn't happy to see...
I'm also guessing there's something else not right and OP needs a pro to
evaluate what's what...
--
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