Equipment sizing that keeps up with you
Cables, breakers, and transformers size themselves automatically per NEC as you build the model. Change a motor HP and watch every upstream device adjust.
What you get
Ampacity, derating factors, and conductor selection — all automatic based on your circuit configuration.
Overcurrent protection device sizing per NEC 240, including standard trip sizes from NEC 240.6.
Change any load and watch cable sizes, breaker ratings, and protection settings adjust automatically.
Model noncoincident behavior directly on loads and scenarios so sizing and load flow use the same operating assumptions.
Sizing follows current National Electrical Code requirements including ampacity tables and derating.
Engineering judgment wins. Override any auto-sized value when the situation calls for it.
Automatic parallel conductor sizing when a single conductor isn't sufficient.
How auto sizing saves hours
Manual equipment sizing means flipping through NEC tables for every circuit. ekx does it automatically for every device in your model, and keeps it updated as you make changes.
- Cable sizes calculate the moment you connect a load
- Breaker trip settings follow NEC requirements automatically
- Change a motor HP and every upstream size adjusts
- Model noncoincident behavior directly on loads and scenarios
- Override any value when engineering judgment says otherwise
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 2023. Sizing calculations reference current ampacity tables, derating factors, and overcurrent protection requirements.
Yes. Any auto-sized value can be overridden manually. The system will flag if your override doesn't meet NEC minimums.
Yes. When a single conductor can't carry the required ampacity, ekx will automatically size parallel conductor sets.
Upstream equipment sizes from the same modeled load assumptions used in load flow. If downstream panels are noncoincident, represent that directly on the loads or in scenario overrides so the whole system stays on one basis.
Cables (conductors), overcurrent protection devices (breakers and fuses), and transformers. Sizes update live as you change the model.
Stop flipping through NEC tables.
Auto equipment sizing that updates as you design. Per NEC 2023.
Start Free