Calculate voltage drop across wires for single and three-phase electrical systems.
The NEC recommends no more than 3% voltage drop for branch circuits and 5% total for feeder + branch circuits combined.
Yes, voltage drop increases with distance. Longer runs need thicker wire (lower AWG) to keep drop within limits.
Three-phase systems have a lower voltage drop factor (√3 vs 2) for the same current, making them more efficient for long runs.