To protect against exposure to 20,000 volts of electricity, what class of hard hat is required?

The appropriate hard hat for protection against exposure to 20,000 volts of electricity is classified as Class E. Class E hard hats are specifically designed for electrical protection and can withstand electrical conductors up to 20,000 volts. This type of hard hat is essential for workers who may be in environments where electrical hazards are present, providing them with a level of safety needed to prevent electrical shock or serious injury.

In comparison, Class A and Class B hard hats offer some electrical insulation, but they are not rated for the higher voltages that Class E hard hats can protect against. Class C hard hats do not provide electrical protection at all, as they are made of conductive materials and are meant for protection from impact only. Therefore, Class E is the correct choice for someone needing to work safely around high-voltage electricity.