Why not put it all in one conduit? (kind of like your original but without the second runs beside)
puccagirl wrote: ↑Thanks sprdave... my plans are to run 1 x 1" EMT conduit from branch circuits to Transfer switch, and 1 x 1" EMT conduit from transfer switch to electrical panel. All conductors for each circuit will be included (neutrals), #14 wires increased to #12 to avoid voltage drop and account for de-rating.
The neutrals will just loop through the transfer switch, to avoid the EMF issue.
I know its running two conduits, but I think it still should meet code, as the branch circuit feeders (with neutrals) to the house (plugs/lights) are in one conduit, and line side to the 15A breakers (with neutrals) are in another conduit to the panel.
There may not be any perfect way to do this, given the type of transfer switch.