Wire Gauge Required Question
For some reason I just can't understand the various wire gauge tables, and I have tried to, so I am hoping somebody will take pity and do all the work! :) One table that I can follow says that for...
Forum Discussion
chevor wrote:
This is what I know:
14 gage copper is good for 15 amps
12 gage copper is good for 20 amps
10 gage copper is good for 30 amps
Watts divided by volts equal amps
good in the sense that NEC says that wire size in romex will handle that level of current without posing a fire hazard from overheating when in a confined space (walls).
That's it. There are cases when 14 ga will work just fine, other cases where it is woefully inadequate even at 15A. And this is for high voltage AC applications where a 5% or maybe a 10% voltage drop is acceptable.
