In a service disconnect with multiple disconnects, how is the bonding achieved?

In a service disconnect that contains multiple disconnects, bonding is typically achieved using one jumper for all disconnects. This approach ensures that all the disconnects are electrically connected to the same grounding system, maintaining a consistent ground potential and preventing differences in voltage that could pose safety hazards.

Using a single jumper simplifies the bonding process by eliminating the need for multiple connections and ensuring that all disconnects are effectively bonded to the grounding system with minimal resistance. This method also adheres to electrical codes and standards, which often specify bonding requirements to enhance safety and reliability in electrical installations.

The other choices present less effective or incorrect approaches to bonding. Bonding only at the last disconnect does not provide adequate grounding for the preceding disconnects, and requiring each disconnect to have a separate jumper could create unnecessary complexity and potential for error in the installation. Claiming that bonding is unnecessary goes against established safety practices and regulations, as bonding is a critical component of electrical safety.