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Transfer switch and grounding - Page 2

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Posted by Josepi on November 20, 2010, 2:34 am
 
It's the same old multiple grounding issue. It always sounds good but a
nasty electrical fault in the rest of the home could prefer your new ground
and burn off that little #14 ground wire.


If you only connect the frame (chassis) of the generator to the
ground, I see no problem in having another ground even if it's
'extra'.
Make sure the frame of the generator in not already tied to a neutral
in the transfer switch.

George




Posted by Martin Riddle on November 21, 2010, 3:00 am
 



You have to check the NEC code on this.
I vaguely remember the ground is required if itís a permanent
installation.

See this page...
<http://www.electrical-design-tutor.com/generatorgrounding.html>

I think youíre a "Non-Separately Derived System", you should be fine.

Also, another ground can cause a voltage loop on the ground line to the
generator.
(if its any sizable distance from the main neutral/ground bonding point)
This could cause other problems with GFI's and such.


Cheers



Posted by Josepi on November 21, 2010, 10:37 pm
 GFIs do not measure, use or need a ground in any way. The work by measuring
differential current in the two current carrying conductors.

It can interfere with other items though and the NEC is a good thing if you
can find any specification to it. Grounding is a very complicated, poorly
understood field, even by your inspectors. Each one will give you a
different answer, in some cases, on grounding. Ask your local one for his
opinion.


You have to check the NEC code on this.
I vaguely remember the ground is required if itís a permanent
installation.

See this page...
<http://www.electrical-design-tutor.com/generatorgrounding.html>

I think youíre a "Non-Separately Derived System", you should be fine.

Also, another ground can cause a voltage loop on the ground line to the
generator.
(if its any sizable distance from the main neutral/ground bonding point)
This could cause other problems with GFI's and such.


Cheers





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