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Small grid-tie inverters? - Page 10

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Posted by Don Young on June 29, 2008, 2:05 am

Is the final outcome of this extremely common thread scenario:"According to
expert opinion, backfeeding the power lines is impossible with a small
inverter or generator and even if it were it poses no hazard to anyone
important. Anyone who has been electrocuted by this was so dumb that he
deserved what happened and it was not the fault of anyone else. If your
power is off because your service drop is lying on the ground in a storm,
everyone knows not to touch it. The NEC requirements are nonsense and should
be totally disregarded in this case."?

There has been a lot of discussion and rationalization on this subject over
many years but I still haven't heard why anyone should (as opposed to could)
energize their home electrical system without a functional transfer system.

Don Young

Posted by stu on June 29, 2008, 3:33 am


In this case the subject line says it all "Small grid-tie inverters". A
"functional transfer system" would make it "Small non-grid-tie inverters"

Nice test NJ, I want a shed like yours.

Posted by z on June 29, 2008, 6:05 pm

Yeah its amazing how much I learn from these newsgroups from time to


Posted by Neon John on June 29, 2008, 7:08 pm
<oral diarrhea snipped>

Even this sentence makes no sense or maybe you're functionally illiterate.

No one neither could nor should try to power up his house without a transfer
switch for all the reasons discussed in this thread.  Top of the list of
reasons is, he can't.

If what you're trying to say is that you haven't heard why someone should use
his generator without buying a fancy transfer switch with all the stamps and
approvals and even the blessings from the right hand of God, well, here's a

Two, actually.  I don't need one and I don't want one.  I was born with enough
good old fashioned common sense to be able to flip off one breaker labeled
"main" and flip on another breaker labeled "generator".  So far I've done that
tens, maybe hundreds if times without getting it wrong.  Not even once,
amazing as it may seem of a task about as complicated as sticking the right
leg in the right hole in your pants in the morning.

At least with me doing the switching, I know that it's done right.  Not
necessarily so if I rely on that fancy enclosed transfer switch.  On more than
once occasion I've seen an enclosed disconnect switch fail.  The little fiber
finger that operates the blade on the knife switch breaks and that switch
stays engaged.  The handle says "OFF" but the electrons say "ON"!

On one occasion that left one phase of a 480 volt, 3 phase feed to a control
panel energized.  Had I not been the highly trained and careful individual
that I am, I might have been killed.  Just like a careless lineman.

True, the odds of that kind of failure happening are rare but then again, the
odds of me screwing up my two-motion manual generator transfer operation are
even rarer.

You seem to be a fellow who need a lot of authority in his life.  I
understand.  Managing one's affairs is something that few people do well.  For
you, they have those fine and expensive transfer switches.  For the rest of
us, we'll get along fine without 'em.

John De Armond
See my website for my current email address
http://www.johndearmond.com  <-- best little blog on the net!
Tellico Plains, Occupied TN
If stupidity hurt then they'd be putting morphine in the water supply.

Posted by Cydrome Leader on June 30, 2008, 5:11 am
I've noticed that generator and datecenter UPS transfer switches seem far
more complicated than they should be. It gets even more fun when you have
both of those and internal or soft bypass switches inside the UPS itself.

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