[RE-wrenches] GFDI requirements

[Dave Angelini Offgrid Solar]

If it is all Grundfos electronics and the panels they specify, then I
would get a permit and let the inspector make the decision.  

Dave
Angelini Offgrid Solar
"we go where powerlines
don't"
http://members.sti.net/offgridsolar/ [1]
e-mail offgridsolar at sti.net
[2]
text 209 813 0060

On Tue, 27 Oct 2020 12:11:17 -0700, Brian Mehalic 
wrote:  Well Jay, if you call each of those poles "arrays" then you've got
a path around the 2 parallel circuit maximum :)    

Note 2020 NEC language
has changed a bit, though it's still not crystal clear:  

"PV system dc
circuits that exceed 30 volts or 8 amperes shall be provided with dc
ground-fault protection meeting the requirements of 690.41(B)(1) and (B)(2)
to reduce fire hazards. Solidly grounded PV source circuits with not more
than two modules in parallel and not on or in buildings shall be permitted
without ground-fault protection."              Brian Mehalic 
NABCEP
Certified Solar PV Installation Professional(tm) R031508-59 National
Electrical Code(R) CMP-4 Member (520) 204-6639
     Solar Energy
International
http://www.solarenergy.org [3]      SEI Professional Services
http://www.seisolarpros.com [4]                
  On Tue, Oct 27, 2020 at
11:40 AM jay  wrote: HI All,

 I've got a question about GFDI requirements
and do they apply to the following. 

 Here is the project.

 1. water
pumping DC direct grundfos SQFLex 

 2. no humans anywhere around

 3. no
buildings or living structures

 4. would be 3 pole mounts: each mount as 1
string, so 3 strings.
 2019 code 690.41 B2 says that 2 modules in parallel
without humans involved doesn't need GFDI

 5. system would be solidly
grounded.

 So what is the requirement for needing GFDI on this project?


thanks

 jay

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