Voltage drop calculation — build and observe
Place a source, connect a cable, add a load — and see voltage drop across the cable immediately. Change the cable length or conductor size and watch the impact in real time.
What you get
Voltage drop appears the moment you connect a cable between a source and a load.
Increase cable length and watch voltage drop grow at the load. See the 3%/5% limits in context.
Upsize the conductor and see voltage drop decrease. Understand the trade-off between cost and drop.
See total voltage drop from source to load across multiple cable segments and transformers.
Cables exceeding your voltage drop limit are flagged visually.
Not one circuit at a time — see voltage drop across your entire system.
Learn voltage drop by interacting with it
Formulas tell you how it works. ekx shows you. Build a circuit, set a cable length, and see the voltage at the load. Then change parameters and watch results update.
- Build a simple source-cable-load circuit to see basic voltage drop
- Extend the cable and observe voltage drop increase
- Upsize the conductor and see improvement
- Add more circuits to see system-wide voltage drop effects
Start free. Upgrade when you need more.
Free tier includes 1 project with up to 2 buses. Paid plans start at $27/month for consultants and $149/month for unlimited access.
View All PlansFrequently asked questions
A utility source, one cable, one load. Set the cable length and conductor size. Voltage drop at the load calculates instantly.
ekx shows the results — voltage at each bus and drop across each cable. The calculation uses standard impedance methods consistent with NEC recommendations.
NEC recommends 3% voltage drop for branch circuits and 5% total from source to load. ekx lets you set your own thresholds.
Yes. A source and load with one cable segment fits within the free tier's 2-bus limit.
See voltage drop calculate before your eyes.
Build a circuit. Set a length. Observe the drop.
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