No, but he covers it in other videos.BTW: One thing the video did not go into was talking about why NOT to do an auxiliary grounding electrode for the PV array.
BTW: One thing the video did not go into was talking about why NOT to do an auxiliary grounding electrode for the PV array.
BTW: The NEC makes a specific allowance for routing the EGC separately from the PV circuits. I suspect at least part of the reason for this is to allow the EGC to go directly to the common ground bus where the Grounding Jumper is.Yes, With ground-mounted arrays, it can be difficult to avoid a 2nd earth grounding point. In this situation, I run the EGC from the array directly to the main breaker box where the system grounding jumper goes to the grounding electrodes. This keeps the potential pulse away from all the solar electronics.
You do not need 6AWG, it can be sized to the amps carried by the PV current carrying conductors.I have a 4000W ground mounted array >100 feet from the house. Even though NEC 690.47(A)(1) says that “the PV output circuit is the only connection to ground required for the PV system” do you recommend I still run 6AWG copper ground wire with my PV cables in a buried conduit to join with the earth ground bus bar at my house where the EG4 6000XP inverter resides?
I suspect that is the right thing to do to avoid potential differences as everything is connected to one earth ground.
Good one to bookmark for sure
Thanks good to know 6AWG is overkill. I will eventually have two ground mounted arrays, each delivering Vmp 310V PV array current 13A. What size copper do you recommend?You do not need 6AWG, it can be sized to the amps carried by the PV current carrying conductors.
You are required to run a ground wire from array to house grounding system. That is the only ground wire needed, no auxillary ground rod.
What size are the current carrying conductors? Usually one size down.Thanks good to know 6AWG is overkill. I will eventually have two ground mounted arrays, each delivering Vmp 310V PV array current 13A. What size copper do you recommend?
You could have used 14 AWG. But I would have also ran 10.I ran 10AWG to minimize voltage drop with a 420 foot run even though amperage is only about 12A. The ground wire is 10AWG, I just keep everything the same size usually. I could have used 12AWG.
Or recommended.Additional grounding of the PV system is permitted but not required. This seems to suggest that attaching PV array ground to earth ground is not required.
Ground faults do not go to earth. They return to the source. (N/G bond)However it doesn’t seem a big deal for me to connect the ground wire from the PV array to the earth ground before the PV cables enter the house. Also any ground faults would go directly to earth-ground instead of coursing through the inverter to the earth grounded distribution system.
What type of wire do you plan on using for direct burial?I am planning on direct burying my PV wires from my ground mount back to the inverter at my house. Should the ground wire be bare in the trench?
I wouldn't use bare. But if your ground mount is made of metal posts in the earth, it really doesn't matter.I am planning on direct burying my PV wires from my ground mount back to the inverter at my house. Should the ground wire be bare in the trench?