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← Commercial Electrical Design: Start to Finish
Step 3 of 8

Feeder & Conductor Sizing

With the 2000A service and distribution architecture set in Step 2, this step sizes the actual conductors — floor feeders, the chiller feeder, and the elevator feeder — per NEC 310.15 ampacity and Chapter 9 conduit fill.

Run it yourself
→ Ampacity Calculator (NEC 310.15)→ Conduit Fill Calculator

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