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From Visitor : I am using Iron ridge xr10 rails, and have changed my panel layout a little bit. I have 8 grounding lug bolts. Does each individual rail need a grounding lug bolt, or each pair of rails that support a group of panels?
From Renvu/Michele : Thank you for your inquiry. The grounding can be done two ways. Either each individual rail needs to be grounded, or the rails can be spliced using "bonding" splices, which then require only one ground for the full combined rail.
For your specific order I see you got the IRONRIDGE Splice Kit for XR10 Rail, Bonded XR-10-SPLC-BD XR-10-SPLC-BD, this is bonded which is code for grounding! So for you only one ground lug is required for the full combined rail.
From Visitor: The ironridge grounding diagram shows 1 ground connection for every two rails. I am not asking about rails that are connected with a grounded splice. I am asking about a pair of rails that support a row of panels. Do the panels transfer the grounding to the other rail that does not have a ground lug attached?
From Renvu/Michele : Yes. Each rail set grounded by the module frame. IRONRIDGE UFO Universal Grounding Module Clamp Clear 4pcs UFO-CL-001, this item clamps the modules to the rails and grounds the module frames so as long as one of those things is grounded then they all are!
Additional notes from Ian F: Proof: IronRidge Integrated Grounding Tech Brief
Notice grounding lug section. Mentions needing only one lug per row. 1 row has 2 rails.
Also historical note: Older clamps weren't bonding/grounding. This meant that you had to put a ground screw and wire into each module and ground each rail. Since this was too much work grounding/bonding clamps came around. Paperwork for the grounding lug didn't quite catch up. Some inspectors will say you need one per rail, quoting old rules. But they should be easily educated on the newer standards with one per row since nearly all clamps are bonding now.
From Renvu/Michele : Thank you for your inquiry. The grounding can be done two ways. Either each individual rail needs to be grounded, or the rails can be spliced using "bonding" splices, which then require only one ground for the full combined rail.
For your specific order I see you got the IRONRIDGE Splice Kit for XR10 Rail, Bonded XR-10-SPLC-BD XR-10-SPLC-BD, this is bonded which is code for grounding! So for you only one ground lug is required for the full combined rail.
From Visitor: The ironridge grounding diagram shows 1 ground connection for every two rails. I am not asking about rails that are connected with a grounded splice. I am asking about a pair of rails that support a row of panels. Do the panels transfer the grounding to the other rail that does not have a ground lug attached?
From Renvu/Michele : Yes. Each rail set grounded by the module frame. IRONRIDGE UFO Universal Grounding Module Clamp Clear 4pcs UFO-CL-001, this item clamps the modules to the rails and grounds the module frames so as long as one of those things is grounded then they all are!
Additional notes from Ian F: Proof: IronRidge Integrated Grounding Tech Brief
Notice grounding lug section. Mentions needing only one lug per row. 1 row has 2 rails.
Also historical note: Older clamps weren't bonding/grounding. This meant that you had to put a ground screw and wire into each module and ground each rail. Since this was too much work grounding/bonding clamps came around. Paperwork for the grounding lug didn't quite catch up. Some inspectors will say you need one per rail, quoting old rules. But they should be easily educated on the newer standards with one per row since nearly all clamps are bonding now.
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