I'm not an Electrician  I want to put a 100 amp sub box in my garage directly adjacent to the main power box for the house that is located to the outside wall of the garage  then run 3 or 4 circuits off of the sub panel  I have the box breakers & outlets & I can run the circuits from the sub box  two 50amps (Welders  Air Comp  AC  & a just gifted to me UVB tanning bed for my Psoriasis) the Tanning bed uses 4 prongs  hot  hot   neutral   ground So at this point I need 3-4 feet of the heavy duty wire (I was told 2 2 2 3) ?? from the main box thru the wall to the sub box