#6 grounding wire grounding rod?
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NABCEP certified Technical Sales Professional
[URL="http://www.solarpaneltalk.com/showthread.php?5334-Solar-Off-Grid-Battery-Design"]http://www.solarpaneltalk.com/showth...Battery-Design[/URL]
[URL]http://www.calculator.net/voltage-drop-calculator.html[/URL] (Voltage drop Calculator among others)
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MSEE, PEComment
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If I had a ground electrode, with a single wire (GEC) which went through panel B, terminated at the ground bar in that panel and then another wire left that same ground bar and continued to the ground bar in Panel A which was the service equipment, I would not consider that to be compliant.SunnyBoy 3000 US, 18 BP Solar 175B panels.Comment
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I would not consider a bus bar to be an irreversible splice, so it all seems to come down to where the GEC is being terminated. If it ends at the bus bar, then everything else connected to that bus bar would be an EGC instead, and you would not be splicing the GEC.
If I had a ground electrode, with a single wire (GEC) which went through panel B, terminated at the ground bar in that panel and then another wire left that same ground bar and continued to the ground bar in Panel A which was the service equipment, I would not consider that to be compliant.NABCEP certified Technical Sales Professional
[URL="http://www.solarpaneltalk.com/showthread.php?5334-Solar-Off-Grid-Battery-Design"]http://www.solarpaneltalk.com/showth...Battery-Design[/URL]
[URL]http://www.calculator.net/voltage-drop-calculator.html[/URL] (Voltage drop Calculator among others)
[URL="http://www.gaisma.com"]www.gaisma.com[/URL]Comment
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Grounding Electrode Conductor. A conductor used to
connect the system grounded conductor or the equipment to
a grounding electrode or to a point on the grounding electrode
system.
Note there are two objects being referenced:
System ground conductor aka grounding circuit conductor (neutral), or equipment. What this means is there can be more than ONE GEC. The System Grounded Conductor as you know can only be bonded once and only once. Equipment can be grounded as much as you like. But here is your real answer about bus bars.
250.64 Grounding Electrode Conductor Installation.
Grounding electrode conductors at the service, at each
building or structure where supplied by a feeder(s) or
branch circuit(s), or at a separately derived system shall be
installed as specified in 250.64(A) through (F).
(C) Continuous. Grounding electrode conductor(s) shall
be installed in one continuous length without a splice or
joint except as permitted in (1) and (2):
(1) Splicing shall be permitted only by irreversible
compression-type connectors listed as grounding and
bonding equipment or by the exothermic welding process.
(2) Sections of busbars shall be permitted to be connected
together to form a grounding electrode conductor.
(D) Service with Multiple Disconnecting Means Enclosures.
Where a service consists of more than a single enclosure
as permitted in 230.71(A), grounding electrode
connections shall be made in accordance with (D)(1),
(D)(2), or (D)(3).
(1) Grounding Electrode Conductor Taps. Where the
service is installed as permitted by 230.40, Exception No.
2, a common grounding electrode conductor and grounding
electrode conductor taps shall be installed. The common
grounding electrode conductor shall be sized in accordance
with 250.66, based on the sum of the circular mil area of
the largest ungrounded service-entrance conductor(s).
Where the service-entrance conductors connect directly to a
service drop or service lateral, the common grounding electrode
conductor shall be sized in accordance with Table
250.66, Note 1. A tap conductor shall extend to the inside
of each service disconnecting means enclosure. The
grounding electrode conductor taps shall be sized in accordance
with 250.66 for the largest conductor serving the
individual enclosure. The tap conductors shall be connected to
the common grounding electrode conductor by exothermic
welding or with connectors listed as grounding and bonding
equipment in such a manner that the common grounding electrode
conductor remains without a splice or joint.
(2) Individual Grounding Electrode Conductors. A
grounding electrode conductor shall be connected between
the grounded conductor in each service equipment disconnecting
means enclosure and the grounding electrode system.
Each grounding electrode conductor shall be sized in accordance
with 250.66 based on the service-entrance conductor(s)
supplying the individual service disconnecting means.MSEE, PEComment
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