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Posted by J. Clarke on June 18, 2006, 12:03 pm
Pete C. wrote:
> "J. Clarke" wrote:
>>
>> Pete C. wrote:
>>
>> > "J. Clarke" wrote:
>> >>
>> >> Pete C. wrote:
>> >>
>> >> > "J. Clarke" wrote:
>> >> >>
>> >> >> Pete C. wrote:
>> >> >>
>> >> >
>> >> > <snipped>
>> >> >
>> >> >> > Have to agree. The normal snap in breakers are very much
>> >> >> > comparable to a regular 5-15 plug connection.
>> >> >> >
>> >> >> > You are holding an insulated breaker case equivalent to an
>> >> >> > insulated plug, and you are connecting / disconnecting a spring
>> >> >> > pressure connection just like a plug.
>> >> >> >
>> >> >> > All is at the same voltages you get with normal plugs, even with
>> >> >> > a two pole breaker since 6-20 and 6-30 and 6-50 plugs are common
>> >> >> > household items as well.
>> >> >>
>> >> >> With "normal plugs" you don't have an exposed 240 volt bus on a
>> >> >> 100+ amp breaker.
>> >> >
>> >> > With a quality panel (like a Square D QO) you don't have a lot
>> >> > that's exposed either. It's also still only 120V to ground so unless
>> >> > you stick both hands in and touch both legs the 240V part is rather
>> >> > irrelevant.
>> >>
>> >> With the cover off the entire bus except those parts covered by
>> >> breakers is exposed, and it's a lot easier to get your hand across two
>> >> lugs than it is to get it across one leg and ground, so you're more
>> >> likely to get 240 than 120.
>> >
>> > First off you should take a closer look at the QO panels, they have a
>> > "shielded bus" design that only exposes the actual breaker connection
>> > points, the rest of the busses are shielded unlike most other brands.
>>
>> So? Juice is juice. The "actual breaker connection points" are quite
>> sufficient.
>
> Sufficient yes, but it's about 10% of the exposed live bus of most other
> brands so there is significantly less area to potentially contact.
>
>>
>> > Second point is that 240V across your fingers may not be nice, but it's
>> > still only 120V through your body to ground and that's what counts.
>>
>> Are you really this ignorant?
>
> Apparently you are.
>
>>
>> > Whether you get a lethal current across your heart depends on a lot of
>> > factors, but your fingers contacting a single 120V terminal or bridging
>> > across for 240V isn't one of them.
>>
>> Depends on which fingers. One finger, no, one on each hand yes.
>
> If you're dumb enough to manage to get one hand on one bus and the other
> hand on the other bus we don't need you in the gene pool.
>
>> >
>> >>
>> >> >> > If you feel better turning off the main then by all means do so,
>> >> >> > it's only your time to reset everything that you're wasting, but
>> >> >> > don't insist that everyone else should do the same.
>> >> >>
>> >> >> If you want to risk your own life to save resetting a couple of
>> >> >> clocks
>> >> >> that's your choice. But to advocate that to a complete stranger
>> >> >> who admits to being clueless with regard to electrical wiring is
>> >> >> irresponsible in the extreme.
>> >> >
>> >> > I never advocated that the OP do anything, I corrected someone's
>> >> > incorrect assertion that most people turn the main breaker off to
>> >> > change a branch circuit breaker. The fact is that most people do not
>> >> > turn the main breaker off to change a branch circuit breaker and in
>> >> > a couple decades of misc. electrical work I've not run across a
>> >> > single person that did.
>> >>
>> >> You are asserting that this is a _fact_. I should like to see the
>> >> methodology by which you determined this. And don't say "everybody I
>> >> know" does it unless you are prepared to demonstrate that "everybody
>> >> you know" is a random and representative sample of the population.
>> >
>> > I consider the fact that I have not seen a single person do it in 20+
>> > years and hundreds of electrical projects with dozens of people a
>> > sufficiently representative sample to conclude that most people do not
>> > turn off the main. It would be a stretch to conclude that nobody did,
>> > but it's a reasonable assessment that most do not.
>>
>> I would say that rather than telling us what most people do, you are
>> telling us that you _really_ need to find some smarter friends.
>
> Nope, at least 75% of those people were professionals and good ones at
> that who primarily do commercial work, not the hacks that only do
> residential because they aren't good enough for commercial.
If you are located in CT or MA I want a list of these people so I know who
to avoid in the future. Otherwise, I'm looking forward to your Darwin
Award.
--
--John
to email, dial "usenet" and validate
(was jclarke at eye bee em dot net)
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