The home i live in is an older one and when they remodeled it. They converted the in house fuse boxes to a circuit breaker panel. The only issue is they didnt update the detached garage. So looking into converting 2 prong to 3 prong outlets i ended up down this rabbit hole. So the garage is fed from 240v 30amp breaker in the panel this wired to 10/3 with ground wire to a junction box the junction box uses 10/3 with ground uf cable that lead into the garage.
Now here's where i need a bit of help. Here's how everything is set up in the garage. The cable leads into a 30 amp safety switch with ground attached to the metal box red wire connects to a 6 fuse box(they linked both reds to each bus side) black wire connects to a 4 fuse box neutral runs to the 6 fuse box and links down to the 4 fuse box There are 8 different circuits(9 wires) ive traced where they go around the garage except for 1 This last one runs in a line next to input from the house but i have to trace that later. There are 6 circuits that i want to keep wired as is. They ran each circuit in its own 12/2 with ground wire to each box/junction Lucky enough every portion seems to be grounded to each fuse/junction/outlet boxes
So i want to modernize this while not having to run any new wires but keep a few spaces incase i add 1-2 specific outlets.
I want to install a modern breaker panel and clean up the wiring a bit
So there is two paths i can take
Path 1 remove all the fuses boxes and saftery cut off switch Wire in a 30amp sub panel with the 10/3 with ground uf cable make a bunch of junction boxes to restore functionality to the 6 circuits have no space to expand or run anything else.
Path 2 Remove just the fuse boxes keep the safety switch becuase its accesible without having to open the panel and throw a disconnect. use the 3 lines from the switch and run to a 12 space sub panel reconnect all the 12/2 with ground lines to seperate 20amp breakers leaves room in case i need a to add anything or if i ever run anything needing specifically 240v
My issue with path 2 is that how do i run the ground for the sub panel to keep it seperate. The ground that leads into the garage is connected directly to the box via a screw(no grounding bar)
Im thinking to take the ground off the switch and add a grounding bar so i can run a ground to the sub panel as well.
Any thoughts or tips?