Why is not wanting to drill out the panel the anti christ
If something goes wrong drilling the panel I then have to pay to power company to come drop power to the house then rewire the panel
I was using southwires wire gauge calculator
Thought it was a sticky on here I’ll have to look on a desk top
I’ll double check #3 on here later on a desk top
Copper
Should have 3 wires since a detached building has to be grounded to a grounding rod not back to the main panel
But I guess you are correct there will be a 4th earth wire in the sub to panel going out to a grounding rod
Thanks everyone and I'll try and do my best explaining my plan
1 - Has to pass inspection - WA state
2 - trying to keep 1 wire type no transitions
3 - don't want to drill the back of the main panel (call me chicken but worried about messing it up but i might on the Shop side since its simple to...