I want to install a HEPD80 whole house surge protector. Its on the main panel, but there is no ground bar in the panel. I live in Illinois where everything is in rigid metal conduit and grounding is handled by it.
So what do I do with the ground wire coming from the HEPD80?
Square D support is mystified and pointed me to their other SPD's that don't have the ground at all like the SDSA1175 (36kA) and HEPD25 (25kA), but even their own marketing materials say they aren't the preferred option for whole house protection.
Edit: I was asked to provide more information about the panel, but can't comment directly on the request because I'm a new user. I will add a picture of the panel, cover off when I can. In the mean time it is an old Square D Q0C30MW225. It has neutral bars, with only white wires going to them.
Edit 2: Edit to add a picture of the panel. It's not a picture of the whole box, but this seems to be the relevant part, its just breakers the rest of the way down.