I'm installing a Plug-On-Neutral (PON) main panel. There is a screw with a label indicating that if I need to bond the ground to neutral, tighten to 40lbs.
Now I know main panels generally have the ground and neutral bonded, and it appears that they all are, but I am assuming something is not. Is it the PON neutral bars specifically that are not currently bonded? Is there any reason, for a main panel install, that I would not want to tighten this screw?
As a side note to someone with a higher reputation. It seems like a "Plug-On-Neutral" tag is warranted.