switch 20 amp brkers to 30 amp
My 5th wheel has 30amp power one a/c. the main and a/c breakers alternately blow during the hot Texas summer days. do you think I could switch my 20amp breakers for 30amp (for the a/c)...? Thank you
Forum Discussion
Increasing the amp rating of a breaker risks a fire. A wire that can only safely carry 20 amps is now being asked to carry 30 amps, a 50% increase. That translates into too much heat, melted insulation, and ignition. The breakers are matched to the wire size.
The only exception to that is you can always DECREASE the amp rating of a breaker compared to wire size since that doesn't increase the possible amp draw over insufficient wiring. When I upped the wire from my converter to my batteries from 8g to 4g, I left the breaker size the same as it was for the 8g wire. I wasn't going for increased amperage, I was merely going for a decrease in voltage drop.
The only exception to that is you can always DECREASE the amp rating of a breaker compared to wire size since that doesn't increase the possible amp draw over insufficient wiring. When I upped the wire from my converter to my batteries from 8g to 4g, I left the breaker size the same as it was for the 8g wire. I wasn't going for increased amperage, I was merely going for a decrease in voltage drop.
