Head protection devices must be worn in locations in the workplace where there is a risk of receiving head injuries from flying or falling objects and electric shock.

Hard hats are described by impact type and electrical class. All hard hats required must meet Type I (blows to the top of the head) or Type II (blows to the top or side of the head) impact requirements.

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Classes of hard hats are all designed based on ANSI-Z89.1.

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• Class C: Conductive; No risk of head injury from contact with electrical conductors. Only classified as injury from flying or falling objects.

• Class G: General; Reduce danger of exposure to low-voltage electric or flying or flying objects.

• Class E: Electrical; Designated for exposure to high-voltage electric conductors up to 20,000 volts.