[AT] grounds/shower

[Chuck Saunders]

I found this handy. you can read the 2008 NEC (NFPA 70) online for free.
http://www.nfpa.org/freecodes/free_access_agreement.asp?id=7008SB
They do restrict you from printing or saving and it isn't the same as having
your own copy. But to look something up it is handy.

On Dec 18, 2007 8:42 AM, George Willer <gwill at gwill.net> wrote:

> Howard,
>
> I had an open neutral on my service that was maybe 10 years old at the
> time
> and underground.  The cable was continuous from the meter base to the
> pigtails on my dedicated 25 KW transformer.  I'm experienced enough to
> recognize a floating neutral instantly and reported it as such.  (It even
> showed up on a very windy day.)
>
> The big shot the power company sent out condemned the service and was
> arranging for another crew to come out to help install a temporary above
> ground service.  Some cooler head in management suggested he check the
> neutral clamp!  (As I already had suggested) The problem was solved and I
> never saw that hot-shot again.
>
> George Willer
>
> > -----Original Message-----
> > From: at-bounces at lists.antique-tractor.com [mailto:at-
> > bounces at lists.antique-tractor.com] On Behalf Of Howard Weeks
> > Sent: Monday, December 17, 2007 6:52 PM
> > To: at at lists.antique-tractor.com
> > Subject: Re: [AT] grounds/shower
> >
> > Any of you ever run into a situation where the neutral lead between
> > the transformer and the house was open?
> >
> > Causes some very interesting problems.
> >
> > Howard in GA
> >
> > On 16 Dec 2007 at 21:57, CEE VILL wrote:
> >
> > >
> > > You were pretty lucky to get that jab when you did, Charlie, in order
> to
> > know about the problem. It is probably lucky you were not sitting in a
> tub
> > full of water when you touched the faucet. The sequence of events almost
> > sounds like the insurance commercial on TV a few years back with
> something
> > falling down the stairs, etc.  It sure was thoughtful of you to allow a
> > path for the current trapped in the supply side to the drain side.
> > (grin). That surely demonstrates where the thinking for that small part
> of
> > the NEC comes from.
> > >
> > > Connections to ground rods should be periodically checked as well.
>  Over
> > time they can loosen and corrode.  I have seen the clamp just sitting on
> > the rod without being fastened at all. The entire system must have been
> > working only from the power company ground, or the fact it was a steel
> > building.
> > >
> > > We had a situation at work once where not enough supply was available
> to
> > an entire shop area.  Machine motors were overheating and breakers were
> > tripping.  Maintenance decided the wiring was not heavy enough.  The
> > solution was going to be to transform the current from 220 to 440, then
> > transform it back to 220 at that area.  I suggested someone was not
> seeing
> > the whole picture, because the wiring was satisfactory for 10 years or
> > more with just as many machines.  Another company was brought in to
> check
> > it out.  Guess what?  Poor connection at the ground stakes.  Hats off to
> > Farmer on this one.  Check the grounds, check the grounds, check the
> > grounds.  That plant area is still up and running now with the same
> > wiring.
> > >
> > > Thanks for your story.  It makes us stop and think about the
> situations
> > that can occur.
> > >
> > > Charlie
> > >
> > >
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