ACDCBag420
Member
- Location
- East Coast
- Occupation
- Solar
I see this a lot doing solar. There is a 200 amp service for a 200 amp panel with a main breaker. The neutral and ground are bonded in the main panel. The solar comes in to a 100 amp service disconnect which has the conductors tapped onto the line side of the main panel. What is see is no neutral ground bonding in the 100 amp solar disconnect and only one bond happening in the main panel. it helps to add that both service disconnects are sharing a grounding electrode. It is my understanding that this is incorrect and that the 100 amp and 200 amp mains should both have the neutral and ground bonded as they are the first disconnect coming from the service entrance conductors. I also see the conduit runs for these two main disconnects being shared and so are sharing a grounded metallic conduit. Does this grounded conduit containing circuits from both disconnects run the risk of creating a parallel path to ground? My understanding is no but if either of the two mains had branch circuits with a neutral ground bond ahead of them that it would travel on the shared conduit back to both main enclosures. Is it because the solar is not a separately derived system that they have been wired to a tap with no neutral ground bond or is what I am seeing just incorrect. Some clarification helps thanks in advance.
