[RE-wrenches] GFDI requirements

[Bradley Bassett]

At least when we sold these they were not listed. We got caught on this a couple of times in WA state and were not allowed to install them. Also Grundfos said not to use a Gfi with them. Maybe a dc gfi might be ok on the PV side of the CU200. 

Brad

Sent from my iPhone

> On Oct 27, 2020, at 3:02 PM, Dave Angelini Offgrid Solar <offgridsolar at sti.net> wrote:
> 
> 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/
> e-mail  offgridsolar at sti.net
> text 209 813 0060
>> On Tue, 27 Oct 2020 12:11:17 -0700, Brian Mehalic <brian at solarenergy.org> 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™ R031508-59
>> National Electrical Code® CMP-4 Member
>> (520) 204-6639
>>  
>> Solar Energy International
>> http://www.solarenergy.org
>>  
>> SEI Professional Services
>> http://www.seisolarpros.com
>>  
>> 
>>> On Tue, Oct 27, 2020 at 11:40 AM jay <jay.peltz at gmail.com> 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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