Grounding conductor for manual multi-circuit transfer switch.

[Fred B]

Installing a manual multi circuit transfer switch (Reliance 10 circuit manual transfer for a portable generator), question is related to the grounding conductor from the transfer switch to 3 different house panels. Can the primary generator grounding conductor terminate say into the first subpanel that it comes to and then all the additional panels all the way back to the main panel just use the gounding conductor that is provided by the subpanel feed from the main panel, or do I need to install seperate grounding conductor to each panel?
Will be providing seperate grounded conductors (neutrals) to each panel, or can same be done for this?

 

[suemarkp]

Can you draw a picture? These transfer switches have a flex whip that attaches to a panel from where you are stealing the circuits to put onto the transfer switch. That whip has an equipment ground that would terminate in that parent panel.

Are you connecting circuits from these other panels to this transfer switch? That could get ugly. Not sure if you're allowed to intermix neutrals from one panel to another. That transfer switch most likely just has a fat common neutral that all circuits share. Not a good design when connecting to circuits from different panels. You need an equipment ground to follow the conductors from each panel. If they are in non-flex metal raceways, that could be all you need (no separate EGC needed).