Article 690, Solar Photovoltaic Systems — Part 3

Article 690, Solar Photovoltaic Systems — Part 3

Analyzing wiring and bonding/grounding requirements.

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

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