Water Resistance ∞

JIS 0 -- No special protection
JIS 1 -- Vertically dripping water shall have no harmful effect (Drip resistant 1)
JIS 2 -- Dripping water at an angle up to 15 degrees from vertical shall have no harmful effect (Drip resistant 2)
JIS 3 -- Falling rain at an angle up to 60 degrees from vertical shall have no harmful effect (Rain resistant)
JIS 4 -- Splashing water from any direction shall have no harmful effect (Splash resistant)
JIS 5 -- Direct jetting water from any direction shall have no harmful effect (Jet resistant)
JIS 6 -- Direct jetting water from any direction shall not enter the enclosure (Water tight)
JIS 7 -- Water shall not enter the enclosure when it is immersed in water under defined conditions (Immersion resistant)
JIS 8 -- The equipment is usable for continuous submersion in water under specified pressure (Submersible)

Dust Ingress Protection ∞

Grade 4 -- Protected against solid foreign objects 1,0 mm diameter and greater.
Grade 5 -- Dust protected. Ingress of duct is not totally prevented, but dust shall not penetrate in a quantity to interfere with satisfactory operation of the apparatus or to impair safety.
Grade 6 -- Dust tight. No ingress of dust.

Last updated 2021-05-30 at 02:33:00