I can’t believe that so far, nobody’s pointed out the most obvious problem.
The panel has what appears to be many knob and tube circuits coming in one big romex connector.
*[/size][/FONT]300.15 Boxes, Conduit Bodies, or Fittings —Where Required.
A box shall be installed at each outlet and switch
point for concealed knob-and-tube wiring.
Fittings and connectors shall be used only with the specific
wiring methods for which they are designed and listed.
Where the wiring method is conduit, tubing, Type AC
cable, Type MC cable, Type MI cable, nonmetallicsheathed
cable, or other cables, a box or conduit body shall
be installed at each conductor splice point, outlet point,
switch point, junction point, termination point, or pull
point, unless otherwise permitted in 300.15(A) through
312.5 Cabinets, Cutout Boxes, and Meter Socket Enclosures.
Conductors entering enclosures within the scope of
this article shall be protected from abrasion and shall comply
with 312.5(A) through ©.
(B) Metal Cabinets, Cutout Boxes, and Meter Socket
Enclosures. Where metal enclosures within the scope of
this article are installed with messenger supported wiring,
open wiring on insulators or concealed knob-and-tube wiring,
conductors shall enter through insulating bushings or,
in dry locations, through flexible tubing extending from the
last insulating support and firmly secured to the enclosure.