Breaker or Fuse (amps) Min. copper wire size (AWG) 15 14 20 12 30 10 40 8 55 6 70 4 For the full story, you'd have to start with table 310.15(B) (16) in the National Electric Code, but there are a ...

If you live in an older home, there's a good chance that there's a fuse box built into your power grid. In fact, the invention of fuse boxes actually dates as far back as the early 20th century ...