Federal Pacific – the name of a railroad? No – it’s the name of a company that produced defective circuit breakers manufactured in Newark, New Jersey. Federal Pacific was named in a class action law suit for falsifying their Underwriters Laboratory testing results.
These breakers are dangerous, as they were linked to numerous house fires due to the fact that they did not trip as designed when a short circuit occurred.
If you have this type of circuit breaker it should be replaced!