On Sat, 14 Nov 2015 07:57:51 -0800 (PST), Uncle Monster
You are right. He clarified his post to say the neutral and ground
were split in the house panel and in that case the ground wire should
go straight from the ground bus in the panel to the neutral/ground bus
in the main disconnect enclosure where the main bonding jumper
Up until 99 or 02 it was legal to feed panels in separate buildings
with 3 wire and create a new neutral ground bonding jumper there.
On Sat, 14 Nov 2015 15:30:38 -0800 (PST), Uncle Monster
Ground loops are not the issue and nothing on the line side of a GFCI
should trip it.
The issue with "regrounding the neutral" is you are going to impose
some current on the grounding conductor and the voltage will rise in
reference to ground level. This will be mitigated when you actually
create another ground reference in the sub panel in a second building
but then you are really not using a separate ground at all.
They still see it as "Objectionable current on the grounding
conductor" so you do not connect at both ends and in the case of the
line side (power company service conductors), you don't have a
grounding conductor at all (just 3 wires)
For most of the life of the NEC they treated a second building as a
separate service in regard to the grounding but they chipped away at
that idea until it disappeared. Now it is just like a sub panel inside
the same building, 4 wire feeder and an isolated neutral. They just
kept the ground rod requirement to create a fresh ground reference for
the equipment grounding bus bar.
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