Wondering about the following general scenario: multiple-inverter systems in which all PV output circuits (perhaps from different roof planes/subarrays) are run through a common conduit into a j-box/gutter and then split off to separate inverters. - Can we get away with combining EGCs from all subarrays into a single "trunk" EGC inside the common conduit before re-splitting into individual EGCs for each inverter? How would this combined EGC be sized? - Is there any logic to running one continuous EGC from each subarray to its associated inverter? i.e. for troubleshooting ground faults, etc? How would this method accommodate multiple subarrays feeding a single inverter (that may only allow one EGC input)?
We have always stuck with the "trunk" method, but just curious about what best practices others are using. -- Corey Shalanski Joule Energy New Orleans, LA
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