How voltage drop, conduit fill and wire size affect each other
A wire size can satisfy ampacity and still produce too much voltage drop over a long route. A larger conductor can reduce that drop while consuming more raceway area. These tools separate each relationship so you can learn it clearly. ZapSketch brings them back together around the route drawn on the plan.
Results are checked against documented NEC 2023 tables for the inputs shown. Follow equipment instructions and all applicable codes and regulations.
Ready to connect the work?
Run all three checks on every home run in a plan
Draw routes on the plan, keep length tied to the circuit, and check conductor size, voltage drop, fill and materials together against NEC 2023.