14 2 Nm Wire. If you want 20 amps of service you need to convert to 122. Southwires Romex SIMpull type NM-B may be used for both exposed and concealed work in normally dry locations at temperatures not to exceed.
A 12 gauge wire is used for 20 amp circuits like. Southwire Romex SIMpull 250-ft 142 Solid Non-Metallic Wire By-the-Roll Item 70123 Model 28827469 Our Romex SIMpull NM-B can be used for exposed and concealed work in normally dry locations at temperatures not to exceed 90AC. -2 is the number of INSULATED wires.
The breaker needs to be the weak link in the chain not the wire.
For use in residential wiring as branch circuits for outlets switches and other loads. A 12-2 NM cable 2-wire contains 2 insulated 12 AWG current carrying conductors black and white and a bare ground wireA 14-3 NM cable 3-wire contains 3 insulated 14 AWG current carrying conductors black red white and a bare ground wireThe 2 line wires are different phases A and B and share the neutral wire for return current. WG is with ground. In three-wire cable there is one white neutral wire plus a black and a red hot wire.
