wrote in message
ups.com...
I have a 15amp circuit breaker from my main panel going to my garage
panel. The wire going to the panel to the garage is 10awg. I was
wondering if i could change that circuit breaker to a higher one. I
have a 220V heater that is 20 amps that keeps tripping the 15 amp
breaker on the main panel. Could I go to a 30amp breaker on the main
panel to the garage? On the garage panel there is 2 15amp circuits and
the 2pole 20amp circuit for the heater.

Probably. Naturally you will want to be certain there is nothing on the
circuit that can't handle 30a; though I can't think of what there could
be...
You also have to figure out how long the cable is, what the load is, and the
voltage drop. Do a search on VD calculators.
If the only load on it is the heater and some lights, VD isn't all that
important. If you have motors or electronics, much more so.
In short, there could have been a good reason for the 15a breaker; make darn
sure there wasn't before changing it.