Which conduit size is proportional to the voltage of a photovoltaic system in terms of grounding?

The correct answer is based on Table 250.122 of the National Electrical Code (NEC), which provides guidelines for determining the appropriate size of grounding conductors based on the continuous current ratings of the overcurrent protection device. This table is essential for ensuring that the grounding system is adequate to handle potential fault currents safely, which is crucial for the operation of photovoltaic systems.

The size of the conduit utilized for grounding must correspond to these standards to provide effective protection and maintain system reliability. The reliance on specific guidelines such as those found in Table 250.122 helps ensure that all grounding conductors can safely manage fault currents, thus preventing equipment damage and enhancing safety.

Understanding the context of grounding requirements in photovoltaic systems is important, as it ensures that all components are adequately protected against surges and faults, which can be influenced by various system voltages and characteristics.