On Thursday, November 28, 2013 9:06:32 AM UTC-8, pltrgyst wrote:
> On 11/28/13 1:28 AM, T wrote:
>
>
>
> > Circuit breakers do wear over time. It's a spring mechanism in there
> > that over a span of time will lose strenghth and not be able to hold the
> > contacts together.
>
>
>
> Ummm, the spring doesn't hold the contacts together. It drives them
> apart when the breaker trips.
>

So if the spring ever breaks, an overloaded circuit will set the building on
fire? Doesn't sound like a failsafe to me.