ECN Forum Forums General Topics of the Trade General Discussion Area how to find voltage drop wire size

ScubaDan,

Check out Table 9 of Chapter 9 to obtain impedance per 1,000 feet based on type of conduit. See my prior post for the formula, if you don't know Ohm's Law.
Power factor is a different concern.
Ambient temperature is a concern, best solved by the lower portion of Table 310.16, after all, because what we are looking for is the correct wire size to operate our equipment.