There is no fixed numerical limit on the exact number of times a circuit breaker can trip before it officially fails, as wear and tear depends heavily on the severity of the electrical fault and the magnitude of the current interrupted. While a high-quality breaker can safely handle multiple minor overloads over its lifetime, heavy short circuits subject internal mechanical springs and contacts to extreme thermal and magnetic stress that can degrade them rapidly. If a breaker trips repeatedly in a short time frame, the internal bimetallic strip or trip mechanism can become fatigued, permanently damaged, or lose its calibration, causing it to either trip too easily or fail to trip when needed. Any breaker that has experienced a severe short circuit or trips continuously should be inspected and replaced by a qualified electrician.
1 votes
Marked as accepted