The
Japan Industrial Standards (JIS) for water resistance uses a
"0" to "8" scale to define the level of
water ingress protection built into each product. If the
product was tested in compliance with this standard it is
usually listed on the product spec sheet. The various JIS
classes are defined below.
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) |
The equipment is usable under relative humidity of 90% and up (Humidity resistant)