Which type of electrical panel enclosure needs to be bonded to the ground?

The correct answer is that all panel enclosures need to be bonded to the ground. Bonding electrical panel enclosures is crucial for ensuring safety throughout the electrical system. It helps to prevent electric shock hazards by providing a low-resistance path to ground for fault currents.

When an electrical fault occurs, such as a short circuit, the bonding ensures that the metal enclosure does not become energized, which could result in a dangerous electrical shock if someone comes in contact with it. Grounding and bonding also protect electrical equipment from damage due to lightning strikes or surges by channeling electrical energy safely into the ground.

While certain panels, like the main service disconnect and remote distribution panels, may have specific bonding requirements, the practice of bonding applies universally to all electrical panel enclosures. This is essential for maintaining a safe electrical system, regardless of the panel's type or location. The objective is to create a reliable and consistent grounding system that enhances the safety of the electrical installation overall.