Mandatory

Impact*: force transmitted to the headform must not exceed 5 kN at the fall of an object of 5 kg from a 1 m height. The impact energy of the helmet at
the end of the test is 49 J.
Penetration*: the tip of the mass used in the test (3 kg over 1 m) must not come into contact with the skull.
Flammability: the helmet should not burn with fl ame emission more than 5 seconds after removal of the fl ame.
* The impact and penetration tests are performed at room temperature, at 50°C and at -10°C.

Optional

In extreme temperatures: impact and penetration tests are conducted at room temperature at 150°C, at -20°C or -30°C.
Protects against accidental short-term contact with a live electrical conductor up to 440 VAC.
Protects against lateral compression. The maximum deformation of the helmet should be ≤ 40 mm.
Resistance to molten metal splashes.

Mandatory

Electrically insulating helmets for use near energised equipment not exceeding 1000 VAC or 1500 VDC (appliance class 0).
Used simultaneously with other electrically insulating protective equipment, these helmets prevent dangerous currents passing through to the person's head.
These optional electrical insulation tests are more stringent than the EN397 and they complement them. (2 triangle marking, Class 0).