IP Ratings

IP ratings consist of two numbers. The first number indicates the degree of protection from Solids and the second number from Liquids. IP65 = IP(6 for Solids)(5 for Liquids).

Number Degree of Protection (Solids) Number Degree of Protection (Liquids)
0 No protection against contact or entry of solids. 0 No protection.
1 Protection against accidental contact by hand, but not deliberate contact. Protection against large objects. (greater than 50mm) 1 Dripping water (vertically falling drops) shall have no harmful effect.
2 Protection against contact by fingers. Protection against medium-size foreign objects. (greater than 12mm) 2 Vertically dripping water shall have no harmful effect when the enclosure is tilted at an angle up to 15° from its normal position.
3 Protection against contact by tools, wire, etc.   Protection against small foreign objects. (greater than 2.5mm) 3 Water falling as a spray at any angle up to 60° from the vertical shall have no harmful effect.
4 Protection against contact by small tools and wires.   Protection against small foreign objects. (greater than 1mm) 4 Water splashing against the enclosure from any direction shall have no harmful effect.
5 Water projected by a nozzle (6.3 mm) against enclosure from any direction shall have no harmful effects. 5 Protection against water jets from any direction.
6 Complete protection of live or moving parts.  Protection against penetration of dust. 6 Water projected in powerful jets (12.5 mm nozzle) against the enclosure from any direction shall have no harmful effects.
    6K Protection against cWater projected in powerful jets (6.3 mm nozzle) against the enclosure from any direction, under elevated pressure, shall have no harmful effects..
    7 Ingress of water in harmful quantity shall not be possible when the enclosure is immersed in water under defined conditions of pressure and time (up to 1 m of submersion).
    8 The equipment is suitable for continuous immersion in water under conditions which shall be specified by the manufacturer. However, with certain types of equipment, it can mean that water can enter but only in such a manner that it produces no harmful effects.
    9K Protected against close-range high pressure, high temperature spray downs.

NEMA Ratings

For complete definitions, descriptions, and test criteria, see the National Electrical Manufacturers Association (NEMA) Standards Publication No. 250.

NEMA 1 - Enclosures constructed for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment and to provide a degree of protection against falling dirt.

NEMA 2 - Same as NEMA 1 including protection against dripping and light splashing of liquids.

NEMA 3 - Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt, rain, sleet, snow, and windblown dust; and that will be undamaged by the external formation of ice on the enclosure.

NEMA 3R - Same as NEMA 3 excluding protection against windblown dust.

NEMA 3S - Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt, rain, sleet, snow, and windblown dust; and in which the external mechanism(s) remain operable when ice laden.

NEMA 4 - Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt, rain, sleet, snow, windblown dust, splashing water, and hose-directed water; and that will be undamaged by the external formation of ice on the enclosure.

NEMA 4X - Same as NEMA 4 including protection against corrosion.

NEMA 5 - Enclosures constructed for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against settling airborne dust, lint, fibers, and flyings; and to provide a degree of protection against dripping and light splashing of liquids.

NEMA 6 - Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against hose-directed water and the entry of water during occasional temporary submersion at a limited depth; and that will be undamaged by the external formation of ice on the enclosure.

NEMA 6P - Same as NEMA 6 including protection against the entry of water during prolonged submersion at a limited depth.

NEMA 12 - Enclosures constructed (without knockouts) for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against circulating dust, lint, fibers, and flyings; and against dripping and light splashing of liquids.

NEMA 12K - Same as NEMA 12 including enclosures constructed with knockouts.

NEMA 13 - Enclosures constructed for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against circulating dust, lint, fibers, and flyings; and against the spraying, splashing, and seepage of water, oil, and non-corrosive coolants.

For More Information Contact Interworld Electronics