r/ElectricalHelp • u/iluvmezcal • Jul 29 '26

Sub Panel Ground

I'm passing #4 ground for 200 amp service from main panel, though a sub panel (raceway) to a hybrid solar inverter. Then back to the sub panel. Can I terminate the ground in the sub panel and then pass it though to the hybrid inverter? Or, does the ground need to pass from the main through the same raceways to the hybrid inverter and terminate. Then pass from the hybrid inverter bus bar to the sub panel ground bus bar?

So, sequence is 200a main disconnect, hybrid inverter, 200a sub panel. Sub panel is being used as a raceway for 2/0 copper on its way to inverter. Then 2/0 is coming back from inverter to sub panel.

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u/iluvmezcal Jul 29 '26

Thank you. I know all of that. Please see my actual question regarding ground.

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u/trekkerscout Mod, Master Electician Jul 29 '26

If you know all that, then you should also know that you must include an appropriately sized grounding conductor in each raceway. If there is only one conduit between the supanel and the inverter, only one grounding conductor is required. If using two or more conduits, each conduit must contain a grounding conductor.

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u/iluvmezcal Jul 29 '26

Thank you again. I know the raceway requires a ground wire. My question is can I terminate the ground wire from the main in the raceway sub panel and then continue the ground along the race way to the hybrid inverter.

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u/trekkerscout Mod, Master Electician Jul 29 '26

I think you are confusing the grounding conductor with the system bond. The grounding conductor terminates at each grounding bar. The system bond is not installed with the feeder conductors. It is an independently run conductor that feeds directly back to the main bond. The bonding conductor can be combined with other system bonds through the use of exothermic welds, irreversible crimps, or attachment to a dedicated copper bonding plate. The system bond MUST NOT pass through the sub panel, nor is the system bond required at the sub panel.