We can summarize the rules for circuit sizing and overcurrent protection of PV circuits as follows:
- Conductor ampacity before correction and adjustment. PV circuit conductors must have an ampacity of at least 125% of the calculated maximum circuit current (CMCC) [690.8(A)] before the application of conductor ampacity correction and adjustment [690.8(B)(1)].
- Conductor ampacity after correction and adjustment. Circuit conductors must have an ampacity of at least