This is a tri-plex in central washington with outdoor fuse panels where I plan to use a multi meter pack and install outdoor 125 amp panels. I found another post titled "How do I convert a service panel to a junction box?". It answers most of my questions except for how I would run conduit and details on how to connect the wires.
The fuse panels are flush with the exterior siding and have hinged access doors. Can I cut holes in the doors and attach conduit? Screw the doors shut when complete?
Should connection of 10ga or bigger be done w split bolts and wire nuts for 12-14ga? How much free length of wire is required in the j box?