Which of the following is suitable for bonding on the supply side of the service disconnecting means?

The choice of listed bonding locknuts as suitable for bonding on the supply side of the service disconnecting means is based on their specific design and certification for electrical applications. Listed bonding locknuts are manufactured to ensure a reliable electrical connection and bonding of raceways, conduits, and boxes. These components are specifically tested to meet safety standards and are recognized for their effectiveness in maintaining a low-resistance electrical bond, which is crucial for the safety and functionality of electrical systems.

In contrast, plastic connectors lack the conductive properties required for effective bonding, making them unsuitable for electrical applications that require grounding. Aluminum bolts, while conductive, may not be approved for use in all situations due to compatibility issues with different metals and potentially leading to galvanic corrosion if they come into contact with other metals. Wooden stakes, being non-metallic, do not provide any conductive path necessary for bonding and are not suited for electrical applications at all.

Therefore, listed bonding locknuts are the preferred choice as they are specifically designed and tested for electrical grounding and bonding purposes, ensuring compliance with safety regulations and standards in electrical installations.