[RE-wrenches] EGC for Multiple Inverters

[Corey Shalanski]

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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