GEC requirements for pole mounted arrays

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csoc64

Senior Member
Location
northeast
Installing 20 panel enphase m215 microinverter system on ground mounted, concrete encased poles. First ground mount I've done in quite a while and I'm a little fuzzy on what the requirements are for grounding/bonding at the array location. For the microinverters, I'll be running a #8 THWN-2 continuous through each inverter back to the panel where the opd will be located. Will pick up the rails and other assocaited equipment with an egc. Do I also need to install a grounding electrode and/or separate GEC at the array. If so, does this need to tie in with the GEC going back to my panel location?
 
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GoldDigger

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Staff member
Location
Placerville, CA, USA
Occupation
Retired PV System Designer
csoc64 said:
Installing 20 panel enphase m215 microinverter system on ground mounted, concrete encased poles. First ground mount I've done in quite a while and I'm a little fuzzy on what the requirements are for grounding/bonding at the array location. For the microinverters, I'll be running a #8 THWN-2 continuous through each inverter back to the panel where the opd will be located. Will pick up the rails and other assocaited equipment with an egc. Do I also need to install a grounding electrode and/or separate GEC at the array. If so, does this need to tie in with the GEC going back to my panel location?
Click to expand...
The requirements change significantly with NEC cycle. What applies in your area?
Is your profile listing of 2011 correct?
 
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shortcircuit2

Senior Member
Location
South of Bawstin
csoc64 said:
Installing 20 panel enphase m215 microinverter system on ground mounted, concrete encased poles. First ground mount I've done in quite a while and I'm a little fuzzy on what the requirements are for grounding/bonding at the array location. For the microinverters, I'll be running a #8 THWN-2 continuous through each inverter back to the panel where the opd will be located. Will pick up the rails and other assocaited equipment with an egc. Do I also need to install a grounding electrode and/or separate GEC at the array. If so, does this need to tie in with the GEC going back to my panel location?
Click to expand...

I'll take a shot at this one...

Because you are running an AC feeder to a structure...you need to comply with 225.30, then 225.31 and install a disconnecting means per 225.32, 225.33, 225.34, and 225.36.

Then install a grounding electrode system per 250.32
 
mwm1752

mwm1752

Senior Member
Location
Aspen, Colo
shortcircuit2 said:
I'll take a shot at this one...

Because you are running an AC feeder to a structure...you need to comply with 225.30, then 225.31 and install a disconnecting means per 225.32, 225.33, 225.34, and 225.36.

Then install a grounding electrode system per 250.32
Click to expand...

Depending on the pole install method you could make your own UFUR for the electrode
 
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