Final answer:
The three classes of helmets are Class G (General), Class E (Electrical), and Class C (Conductive), each designed for specific working conditions and hazards related to impact and electrical safety.
Step-by-step explanation:
There are three classes of helmets or hard hats principally designed to protect workers from impact and electrical hazards. They are designated as Class G (General), Class E (Electrical), and Class C (Conductive). Here's a simple breakdown:
- Class G Hard Hats: These are general helmets designed to reduce the impact from falling objects and to reduce the danger of exposure to low-voltage electricity. They're tested at 2,200 volts.
- Class E Hard Hats: Engineered for those who work in high-voltage environments, Class E hard hats are tested to protect against electrical hazards up to 20,000 volts.
- Class C Hard Hats: Unlike the other two, Class C helmets are not intended for electrical protection but are designed for comfort and impact protection, featuring added ventilation.
These safety helmets serve as essential protective equipment at construction sites and other hazardous work areas, where they help prevent head injuries.