[RE-wrenches] Redundant Bonding

[Solarguy]

Could you maybe add some details to the photo and download it to the
Wrenches ftp site? Then we can all view it there.

I don't recall the process though Michael once posted the steps. The site is
a great place for info just like this. M also screens everything before it
gets posted.

ftp://ftp.re-wrenches.org/pub/ 

 

Jim Duncan

North Texas Renewable Energy Inc

www.ntrei.com <http://www.ntrei.com/>  

NABCEP PV 031310-57

TECL-27398

ntrei at 1scom.net 

817.917.0527

NABCEP Logo

 

 

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of August Goers
Sent: Wednesday, February 20, 2013 2:34 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Redundant Bonding

 

Hi Karl -

 

I'll send you a picture off list showing how we typically wire up 7-terminal
meter sockets. In the Milbank meter sockets we typically use the neutral bar
is factory bonded to the can. So, we pass the neutral through the can and
then connect a ground in the can. This provides the power necessary to run
the meter without bonding the neutral to ground in two locations.

 

I'm not sure that I'm following your issue relating to the inverter and NEC
250.142(B). The Power One 10k unit has HF isolation and still needs a DC GEC
as far as I know.

 

Best,

 

August

415.559.1525

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Karl Jaeger
Sent: Wednesday, February 20, 2013 8:13 AM
To: RE-wrenches at lists.re-wrenches.org
Subject: [RE-wrenches] Redundant Bonding

 

Greetings Wrenches,

I am having issues with the electrical plans reviewer approving our drawing
package. The system consists of a  PVI 10.0, 3-phase inverter to be
interconnected via backfed breaker to a 120/208 service. We have a feed in
tariff program which requires a solar generation meter base. The solar meter
base is provided by the utility, it is 7-terminal therefore it has a neutral
connection and a bond between neutral and ground. The service is also
bonded, of course. We have two bonds resulting in a ground loop. The utility
refuses to allow us to remove the bonding jumper in the solar meter base and
we can't float the neutral thru because the meter must see a neutral  to
spin. The inverter has an isolated transformer which I believe steers us
around 250.142 (B). However, Power One does not specify a GEC termination
point in their inverter so the reviewer is reluctant to accept this
solution. Has anyone ran into this issue? Any thoughts?

Thank you for your help!

 

Karl Jaeger

 <http://lightwavesolarelectric.com/> Description: FOR-EMAIL-SIGNATURE
(Small) 

 

 

 

 

 

 

 

 

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