I have attached Electrical Schematic for my system and highlighted in red my area of concern with grounding.
Grounding.png
There are 2 arrays and 2 inverters in the IronRidge ground mounted Grid Tied system and I am using Sch 40 and 80 PVC and this is an ungrounded system using the SunnyBoy Transformerless Inverters. All the grounding is suppose to go to the earth ground in the Main Service Panel (MSP).
In the Conduit Schedule, located on the bottom left of the schematic, it incorrectly identifies ground 1 as 12AWG ENGAGE CABLE. They are all 10AWG with no micro inverters in the system.
Let me know if this sounds correct. The 10AWG DC grounds (1-1A) from the IronRidge rack enter the inverters on the DC side and connect there. On the AC side of the inverters the 10AWG AC grounds (2-2A) come out and into the 125A Load Center. They would then connect with the 8AWG ground inside the Load Center and be a continuous run to the Main Service Panel and connect to earth ground. I thought I read somewhere that in an ungrounded system using SMA Inverters the ground should be a continuous (no breaks) run from the AC side of the Inverter to earth ground in the MSP. To ground the AC disconnect I am running a separate 10AWG ground wire into the MSP.
Question...
1. Can the (2)10AWG AC grounds from the inverters be connected together inside the 125A Load Center with the 8AWG ground or do they have to run separate. In either case how are they connected to stay within NEC code?
2. How do I ground the 125A Load Center?
Thanks for any help.
Grounding.png
There are 2 arrays and 2 inverters in the IronRidge ground mounted Grid Tied system and I am using Sch 40 and 80 PVC and this is an ungrounded system using the SunnyBoy Transformerless Inverters. All the grounding is suppose to go to the earth ground in the Main Service Panel (MSP).
In the Conduit Schedule, located on the bottom left of the schematic, it incorrectly identifies ground 1 as 12AWG ENGAGE CABLE. They are all 10AWG with no micro inverters in the system.
Let me know if this sounds correct. The 10AWG DC grounds (1-1A) from the IronRidge rack enter the inverters on the DC side and connect there. On the AC side of the inverters the 10AWG AC grounds (2-2A) come out and into the 125A Load Center. They would then connect with the 8AWG ground inside the Load Center and be a continuous run to the Main Service Panel and connect to earth ground. I thought I read somewhere that in an ungrounded system using SMA Inverters the ground should be a continuous (no breaks) run from the AC side of the Inverter to earth ground in the MSP. To ground the AC disconnect I am running a separate 10AWG ground wire into the MSP.
Question...
1. Can the (2)10AWG AC grounds from the inverters be connected together inside the 125A Load Center with the 8AWG ground or do they have to run separate. In either case how are they connected to stay within NEC code?
2. How do I ground the 125A Load Center?
Thanks for any help.
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