Cable sizing per NEC, done for you
Stop looking up ampacity tables and derating factors manually. ekx sizes every cable in your model automatically — and updates when anything changes.
What you get
Conductor sizing based on NEC 310 ampacity tables with proper temperature ratings.
Automatic application of conduit fill, ambient temperature, and bundling derating factors.
Cable voltage drop calculated for every circuit and flagged if it exceeds your threshold.
When a single conductor isn't enough, ekx sizes parallel sets automatically.
Support for different installation methods — raceway, cable tray, direct burial, and more.
Change a load and cable sizes update instantly. No manual recalculation.
Cable sizing integrated with your design
Standalone calculators make you enter data twice. In ekx, cable sizing is part of the model — fed by the same loads, voltages, and circuit configurations you've already defined.
- Cables size automatically based on the connected load
- Derating factors apply based on your installation configuration
- Voltage drop is checked across every cable automatically
- Results update live as you change any parameter in the model
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
NEC 310 ampacity tables for conductor sizing, NEC 310.15 for derating and adjustment factors, and NEC 240 for overcurrent protection coordination.
Yes. Voltage drop is calculated for every cable in the system and is part of the load flow analysis. Cables that exceed your voltage drop threshold are flagged.
Yes. You can select conductor material (copper/aluminum), insulation type, and installation method. ekx will size accordingly.
Cable sizing is integrated into the one-line diagram model. You don't enter data separately — it uses the loads, voltages, and circuit configurations already in your design.
Size every cable in your system automatically.
NEC 2023 ampacity, derating, and voltage drop — all in one tool.
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