Originally Posted by Superchunk
On the one hand, it's 14-2 on a 20A breaker, which is against code. On the other hand, it's just a light and isn't carrying much current/load. I'm hoping the use of 14-2 is allowed for cases like this.
Much code is written to account for situations where something goes wrong, rather than when things are going as designed/intended.
Suppose someone inadvertently drives a nail through that 14-2 cable, creating a fault that draws... oh.... 19.5 amps. That won't trip the breaker, but that exceeds the safe capacity of #14 wire. The wire will get warm, and maybe even hot enough to ignite something. Maybe not in your garage, but in the wall cavity of someone who has some really dry furring strips.