Circut Breaker

[chrisinkanata]

We a 2005 28' Laredo. Frequently in the fall when using a small 1500W space heater, the breaker for that circut trips. Change to another circut and that breaker will trip. Not immediately, but after 8 - 10 minutes. My buddy has a trailer with the identical 'breaker box' but only about a year old. When I move his breakers, they seem far more 'firm' than do mine. Mine seem a bit loose so to speak.

Any thoughts on this? Do they wear out?

Thanks,

Chris