14-2 and 12-2 wire on 20 amp circuit code clarification
I hope you guys can help me with this one, thank you in advance.
In previous posts by other users it was determined that 14-2 wire should not be used on a 20 amp circuit. My home has a garage outlet that is fed by 12-2 wire, however, the 12-2 line to the outlet enters a junction box where 14-2 wire branches off to feed the lights. I changed the 14-2 wire to 12-2 wire to fully utilize the 20 amp breaker and outlets (rather than switching to a 15 amp breaker), however after thinking about it I am slightly confused. Why should I run 12-2 wire to the lights when 90% of lighting fixtures use substantially lighter wire (as small as 18-2). Doesn't wiring 12-2 wire to a light fixture with 18-2 wire completely defeat the purpose?