[RE-wrenches] Grounding Requirement Question

[Mark Frye]

Aaron,
 
I am still back at NEC 2008 on this but see 690.47 (C), especially (3) ..a
single conductor shall be permitted to be used to perform the multiple
functions of dc grounding, ac grouding,.....(5) a common buss bar shall be
permitted to be used for both systems (6) a common grounding electrode shall
be permitted to be used for both systems...
 
Review this article and share it with your inspector in order to determine
what is motivating him.
 
Mark Frye 
Berkeley Solar Electric Systems 
303 Redbud Way 
Nevada City,  CA 95959 
(530) 401-8024 
 <http://www.berkeleysolar.com/> www.berkeleysolar.com  
 

  _____  

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Aaron
Mandelkorn
Sent: Tuesday, September 06, 2011 12:59 PM
To: RE-wrenches
Subject: [RE-wrenches] Grounding Requirement Question


Wrenches,   

Just installed a Magnum MS-PAE battery based system on an E-Panel
distribution box and my inspector seems to have an issue with the grounding.
He is saying that I must run an additional GEC down to the ground rod
because I am dealing with two separate grounding systems.  The DC and AC
side of the grounding system shares the same ground buss bar in the E-Panel
so why wouldn't a single GEC down to the ground rod suffice?  The buss bar
is where the two systems get grounded together rather than at the rod.  The
inspector is telling me to either dig up the rod and run an additional GEC
down to it or connect the additional GEC to the existing with an
irreversible splice.  Am I missing something here?  This requirement just
seem redundant and wasteful.  If I do have to make the correction I will be
going with the splicing option.   Some advise on irreversible splices would
also be greatly appreciated.  I can't seem to source them locally and have
never used them before.  Thanks for any help.      


Aaron Mandelkorn
NABCEP Certified PV Installer


Renewable Energy Outfitters
(970)596-3744
reosolar at gmail.com
www.reosolar.com









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