What type of bonding is used for metallic water piping?

The type of bonding used for metallic water piping is bonding to the grounding system. This approach ensures that the metal piping is electrically connected to the grounding system of a building. By bonding water piping to the grounding system, it provides a clear and low-resistance path to ground in the event of a fault, which helps to protect against electrical shock hazards and can prevent damage to equipment.

When metallic water pipes are bonded to the grounding system, it helps to equalize the electrical potential between different metallic systems in a structure. This is especially important in preventing potential differences that can occur due to electrical faults, which could lead to dangerous situations. This practice is an essential aspect of safety in electrical systems and is typically mandated by electrical codes.

In contrast, ground fault bonding pertains specifically to mechanisms that protect against ground faults, while electrical bonding encompasses a broader concept that may apply to various electrical connections, not solely related to water pipes. Mechanical bonding refers to physical connections that do not necessarily address electrical safety. Thus, the most appropriate choice in this context would be bonding to the grounding system.