At what locations is grounding and bonding required for electrical equipment?

Grounding and bonding are critical safety practices in electrical installations to ensure that electrical systems operate safely and effectively. The requirements for grounding and bonding, particularly in specific locations such as at the portal and at maximum intervals of 1 foot, are essential for preventing electrical hazards.

This approach helps to mitigate the risks associated with electrical faults and provides a safe path for stray currents to return to the ground. By ensuring that grounding and bonding are present at the portal of an electrical system and installed at intervals not exceeding 1 foot, it enhances the overall safety of the equipment and minimizes the potential for electrical shock or fire caused by arcing or short circuits.

In contrast, simply grounding at the main electrical panel alone would not provide adequate protection throughout the entire system. Grounding only at the entrance of a tunnel would not ensure consistent protection within the space, and relying on grounding in junction boxes only does not account for the entire electrical pathway that could be affected by faults. This illustrates the comprehensive nature of grounding and bonding requirements as they relate to minimizing hazards in diverse electrical environments.