Quoted from wisefwumyogwave:

Challenger and sylvania another brand that starts with a z zelco?, lots of brands not covered by insurance because they are cheap, shitty and cause fires, i had challenger and change my main to ge and subs to squar d. NEVER oversize a breaker. Maybe your breaker just broke or melted down, happens with those brand names metioned. Just change your breaker with the same amp rating that was in there, never higher. Wire can only take so many amps through it until it get to warm and melts, thats the whole idea for a certain breaker rating is to protect wire, not devises you plug in. PLUS A LOT of people dont know this but breakers trip at 80 percent of capacity after 2 hours (required for ul listing)