Per the NEC, PowerCalc automatically applies a total of 5% voltage drop (2% on the feeder and 3% on the branch circuit). The user can manually adjust the voltage drop split. The total voltage drop from the power source to the last overcurrent protection device (OCPD) should not exceed 5%. Solving a voltage drop problem can be done by upsizing wires, reducing load on a circuit or shortening a run of wire. PowerCalc makes it easy for you to adjust your design and resolve issues.
Compliance with NEC Title 24 voltage drop requirements can be demonstrated with the software. A 2% limit for feeders and 3% limit for branch circuits, as required by section 8.4 of the 2013 Nonresidential Compliance Manual, can be specified.
