~~Please excuse the mess. Sig under construction~~
i'm talking about what makes an inspector just sign off and312.8 Switch and Overcurrent Device Enclosures with
Splices, Taps, and Feed-Through Conductors. The wiring
space of enclosures for switches or overcurrent devices
shall be permitted for conductors feeding through, spliced,
or tapping off to other enclosures, switches, or overcurrent
devices where all of the following conditions are met:
(1) The total of all conductors installed at any cross section
of the wiring space does not exceed 40 percent of the
cross-sectional area of that space.
(2) The total area of all conductors, splices, and taps installed
at any cross section of the wiring space does not
exceed 75 percent of the cross-sectional area of that
(3) A warning label is applied to the enclosure that identifies
the closest disconnecting means for any feedthrough
go away... i'm not trying to confuse this with either logic,
or the NEC. 30 feet of #10 stranded doesn't cost all that
much, leaves a clean interior to the panel, if you use a 6x6
gutter in a 4" wall, leaves a simple way into the panel for
future additions. there's enough of it projecting out of the
wall to land a 3/4" pipe.
i will confess that with regards to (3) above, i did not know
that was permitted under the code currently....
old school is you don't have conductors in a raceway or box
that aren't there for serving the equipment, and a panel isn't
to be used as a raceway...