On 22 Feb 2006 15:13:18 -0800, "asco" wrote:

An inspection on our home (7years old) recently revealed that both our
air conditioning units have 40 amp circuit breakers instead of 30 amp
(the unit asks for 30 amps). How big of a deal is this? And if so, is
it an expensive thing to change?

If the wire is #10 copper or better, there's no reason to
change breakers. If it's #12 copper, you should be on
30A breakers. If it's less than #12 copper, you should
run new lines. The breaker doesn't care what the power
draw of the terminal appliance is.

--Goedjn