Next message: Eric Thompson: "lv-ab: Circuit Protection"
On Tuesday, September 2, 2003, at 10:51 AM, Lew Hodgett wrote:
> Something that is not widely known outside the industry is that a
> molded
> case, thermal-magnetic, c'bkr is only required to function ONE TIME.
>
> If the c'bkr is damaged so that it will not operate correctly in the
> process of clearing a fault, that is acceptable. The important thing is
> that the fault has been cleared.
>
whoa. am i reading this correctly?
it sounds like you're saying that if (one of the plastic molded cased,
on-off switch type, e.g. ancor brand) circuit breakers trip, that you'd
better a) find the reason the breaker tripped (of course), and b)
immediately replace the breaker. what is "damaged so that it will not
operate correctly"? it trips, you switch it back to 'on' from 'off', it
catches in the 'on' position as you'd expect, but having already
cleared a previous fault, there's no guarantee it will clear a second?
i'd hope that hope that if it were damaged, it wouldn't catch in the
'on' position. if 'on' doesn't necessarily mean 'safe', however, then i
now better understand why some people who buy used boats immediately
replace every breaker on their board (but i certainly would NOT
understand why this would be an allowed design under UL or ABYC
standards).
-nate
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