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ANSI Z89.1
CLASS E: Electrical (utility service, non-conducting) intended to protect against falling objects plus reduce the danger of high voltage electrical shocks and burns. Offers protection of up to 20,000 volts.
CLASS G: General Use (limited voltage – non-conducting) intended to protect against falling objects plus reduce the danger of low voltage electrical shocks and burns. Offers protection of up to 2,200 volts.
CLASS C: Class C Hard Hats are not tested for electrical resistance. Designed for lightweight comfort and impact protection and not intended to provide protection from electrical conductors.