Answer (1 of 6): Sure, nothing is to stop you,..but you CANNOT load that wire to 20 amps as you would if the entire circuit was 12 gauge.. you could only load up to 10-12 amps on a 16 gauge wire and even THAT is asking for trouble.
Can a 12-gauge wire handle 25 amps? - Quora
Fig 132 Hi-res Stock Photography And Images Page 28 Alamy, 43% OFF
Will a 6-gauge wire be big enough for a 60 amp breaker? - Quora
What is 12-gauge? - Quora
Speaker Wire And How Many Watts It Can AVS Forum, 59% OFF
Can a 14-gauge wire handle 1500 watts? - Quora
How to keep two wires together when soldering in tight spaces - Quora
Affordable 12 Gauge Wire For Sale At Cost Price, 52% OFF
Can you safely splice electrical wires together? - Quora
Speaker Wire And How Many Watts It Can AVS Forum, 59% OFF
What size wire is best for a 150W 12V circuit? - Quora
Can running speaker wire through drywall damage the wire or the speakers? - Quora
Can you use very thin copper wire as solder? - Quora