I have an external cutoff for my air conditioner that has two physical fuses (TR-50's, time delay 50 amps) outside. This is between the condenser unit and the main power panel, where it is protected by a 50 amp circuit breaker.
An electrician is coming to replace the cutoff (containing fuses) with a simple lever cutoff.
In discussing this he said that a circuit breaker should not be allowed to trip more than 4 or 5 times before being replaced.
That struck me as odd. I have never experienced a need to replace a breaker, and some in my house due to stupid wiring patterns (a plug we use for a kettle is on the same circuit as the plug my wife uses for her hair dryer in the washroom) have tripped more often than 5 times.
I am trying to decide if he trying to upsell me, or has a valid point.