As part of remodeling our kitchen, I was left with a spare 50 amp circuit from a double oven combo that went away.
I want to reroute this away from the kitchen to the garage to become power for our EV charger outlet (NEMA 14-50). Also, I can unplug the charger and use it for my MIG welder.
The challenge here the cable is not long enough. I have purchased a roll of wire that is the right size. It is Romex Type NM-B 8-3 wire with ground.
Background: I was a Navy electrician but its been 30 years. I did alot of maintenance on a ship but did not install any new circuits. I need someone to verify my details.
I'm planning to put a 4" box in the ceiling of the basement on the side of a floor joist. Old cable in one side, new cable out the other side. Joining them with ???
One idea was to purchase a trio of Polaris type connectors or Southwire 65179640 uninsulated connectors plus 3M rubber tape topped with 3M vinyl tape.
And there is likely a wire nut for wires that size but due to the amps involved and long charge times, I think I like the idea of an allenhead threaded fastener locking the wire into a coupler better.
What have you seen out there? Most of the internet results I'm seeing mostly relate to 120V/15 amp circuits.
