I'm in the process of upgrading my knob and tube wired house. First on my list is to upgrade to a 200 amp panel. I was planning to pre-wire new circuits with 12/2 NM cable and have them end at junctions boxes under each room. Each circuit will then be wired to its own 20A circuit breaker. This will allow me to gradually rewire each room one at a time. I will also run a new circuit for lighting for the house using 14/2.
My 1st question is, would it be possible to run new circuits with 12/2 and then branch out to each receptacle in a room using 14/2 from the junction box? Or would I have to use 12/2 cable throughout the new circuit?
And my 2nd question. After the rewire, will I have to remove the old wire inside the walls or can I just tape and cap them off (these wires will be no longer be powered).
Thanks for the help!
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