How far can you run 102 wire without voltage drop?

Answer 1

I assume you mean 10/2, as in 10 awg, 2 conductor copperwire? The answer is zero feet. Any time you run a current through a wire, there is voltage drop, no matter how short the wire is. The longer the wire, the larger the voltage drop will be. What you really want to know, I think, is how far you can run 10 awg wire and stay within the acceptable limit of voltage drop. In the US, the National Electrical Code recommends no more than 3% voltage drop for a branch circuit. In this case the maximum run of 10 awg wire (assuming a 30 amp breaker and a 120 V circuit) would be about 48 feet. If the maximum load is less than 30A, then the run could be longer. For instance, if the max load were 15 A, the max run would double, to about 96 feet. If the supply voltage is 240 V instead of 120, then the run length is double the above figures.