CSLB C-46 Solar ContractorPhotovoltaic System InstallationEasy
A solar technician is performing a final inspection of a roof-mounted PV array before commissioning. They notice that the module frames are not bonded to the equipment grounding conductor. Which NEC requirement is being violated?
- ANEC 690.43
- BNEC 690.71
- CNEC 690.4(B)
- DNEC 690.47
Show answer & explanationAnswer & explanation
Correct answer: A. NEC 690.43
NEC 690.43 specifically mandates that exposed non-current-carrying metal parts of PV module frames and mounting systems must be connected to an equipment grounding conductor to ensure safety and prevent electric shock hazards.
Why the other options are wrong
- B. NEC 690.71 deals with overcurrent protection for PV systems.
- C. NEC 690.4(B) pertains to the identification of PV system components.
- D. NEC 690.47 addresses grounding electrode systems for PV systems.
PV Module Grounding
The practice of electrically bonding the non-current-carrying metal parts of PV modules and their support structures to an equipment grounding conductor.
- Prevents electric shock hazards.
- Required by NEC 690.43.
- Ensures fault current has a safe path to ground.
Memory trick: Grounding Code ensures safety, always bond the frame.