We always sized the circuit by the smallest conductor as you posted there so therefore you have 14-2 that is good for 15 amp circuits only but you also have 12-2 there as well that can be used either 15 or 20 amp circuit however as you have other conductor size you are restricted to the smaller conductors if there.Hi,
I presently have a circuit that is connected to a 15A circuit breaker at main box. The wire on this circuit is 12-2, but then goes outside to a few GFCI's and outdoor lights and this wire is 14-2. Is that ok or should I be worried. I have tested all the GFI's and they are grounded and the trip works on them.
Thanks, I am not a skilled electrician just learning about DIY amd home improvement.
If you really want 20 amp circuit then you will have to run a new cable or conductors if in the conduit.