I am installing a new stove and running new romex from the box to the stove. How do I properly connect the 4 wires at the box that currently has only 3 wires so that the new system is grounded?
Saw this above and it is similar to my question earlier, with the response being "yes" as to the box meaning the old breaker panel

Max, no need to double post.
Keep it all here: https://www.askmehelpdesk.com/electrical-lighting/new-wire-feed-old-220-breaker-new-4-prong-recptacle-314780.html