What is the maximum vertical distance from the ground for exposed metal parts that must be grounded?

The maximum vertical distance from the ground for exposed metal parts that must be grounded is 8 feet. This requirement is based on safety regulations aimed at preventing electrical shock hazards. When metal parts are located within a certain height above the ground, they are more accessible to individuals and can pose a risk if an electrical fault occurs. Thus, grounding these parts ensures that they are at the same electrical potential as the earth, which minimizes the risk of electric shock.

Grounding exposed metal parts at a height over 8 feet helps to protect both individuals and equipment from electrical failures and stray voltage. For example, in areas where individuals may have frequent contact with electrical devices, it becomes crucial to maintain proper grounding to ensure safety.

Understanding this requirement is essential for those in the field, as it reflects the principles of electrical safety and adherence to established electrical codes and standards. These regulations are designed with the goal of reducing electrical hazards and promoting a safe environment where electrical installations are present.