What is a key requirement when bonding metal frames of electrical equipment?

The requirement that the bonding conductor must be sized according to the equipment and NEC (National Electrical Code) requirements is fundamental for ensuring safe and effective electrical bonding. Bonding refers to the process of connecting metallic parts together to establish a low-resistance path to ground.

Correct sizing of the bonding conductor is critical because it must be capable of carrying the maximum fault current that could occur within the system. This helps to prevent dangerous voltage potentials from developing on the metal frames of electrical equipment in the event of a fault. By following NEC guidelines, which provide specific tables and formulas for conductor sizing based on the system's characteristics and the equipment being used, electricians can ensure that the bonding will be effective in maintaining safety and reducing the risk of electrical shock or fire hazards.

Proper bonding conductor sizing contributes to the overall grounding and bonding strategy within electrical installations, reinforcing lower resistance paths that are essential for effective system performance and safety.