What type of supports can equipment be bonded to in PV systems according to regulations?

In photovoltaic (PV) systems, bonding equipment to appropriate supports is essential for ensuring electrical safety and minimizing the risk of electric shock. The National Electrical Code (NEC) specifies that metal supports provide the most effective means of bonding due to their conductive properties.

By bonding to metal supports, you create a reliable path for electrical grounding and allow for the effective dissipation of fault currents. Metal supports can also facilitate good electrical connections, thereby enhancing the overall safety of the PV installation. These conductive materials help to ensure that any stray currents or lightning strikes can be efficiently routed to ground, preventing potential hazards such as shock or fire.

While plastic, wooden, and concrete supports may serve structural roles in PV installations, they do not provide the required electrical conductivity necessary for effective bonding. As a result, they are not suitable for this specific purpose according to NEC regulations.