Types and Classes Standards
Protective helmets are classified according to the specific impact and electrical performance requirements they are designed to meet. All protective
helmets in accordance with this standard shall meet either Type I or Type II impact requirements. In addition, all helmets are further classified as
meeting Class G, Class E, or Class C electrical requirements.
Impact Types
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Type I: Helmets intended to reduce the force of impact resulting from a blow only to the top of the head.
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Type II: Helmets intended to reduce the force of impact resulting from a blow which may be received off center or to the top of the head.
Electrical Classes
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Class G (General): Class G helmets are intended to reduce the danger of contact exposure to low voltage conductors. Test samples are prooftested
at 2200 volts (phase to ground). However, this voltage is not intended as an indication of the voltage at which the helmet protects the
wearer.
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Class E (Electrical): Class E helmets are intended to reduce the danger of exposure to high voltage conductors. Test samples are proof-tested at
20,000 volts (phase to ground). However, this voltage is not intended as an indication of the voltage at which the helmet protects the wearer.
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Class C (Conductive): Class C helmets are not intended to provide protection against contact with electrical conductors.
* For further information see American National Standards Institute Standard Z89.1 for head protection available from American National Standards
Institute, 11 W, 42nd, 13th floor, New York, NY 10036.
Suspensions
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8 Point Ratchet: Ratchet headgear provides over 30 adjustments for comfortable fit without removing headgear. One-piece nylon headband with nylon,
crown straps, with two crown height adjustments, providing the ultimate degree in comfort and impact protection. Fits sizes 61/2 to 8”.
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6 Point Ratchet: Ratchet headgear provides over 30 adjustments for comfortable fit without removing headgear. One-piece nylon headband with nylon,
crown straps, with two crown height adjustments, while providing an additional amount of impact protection. Fits sizes 61/2 to 8”.
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4 Point Ratchet: Ratchet headgear provides over 30 adjustments for comfortable fit without removing headgear. Standard headgear with woven
nylon straps. Fits sizes 61/2 to 8”.
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4 Point Pin-Lock: Standard headgear with woven nylon straps. Fits sizes 61/2 to 8”.
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4 Point Plastic: Four-point molded plastic suspension system with cost effective protection. Fits sizes 61/2 to 8”.
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