Enclosures constructed (without knockouts) for indoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and circulating dust, lint, fibers, and flyings); and to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (dripping and light splashing) or oil and coolant seepage.

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Both NEMA and IP ratings are "self-certifying," meaning that manufacturers can simply design a product to meet the standard, then specify that rating without any approval or certification of any outside agency. This method is used by many manufacturers of industrial displays and often leads to products being placed on the market that do not actually meet the ratings.

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For a full comparison of the various ratings, see the "In-Depth: NEMA Ratings" section below. To simplify selection of the proper industrial enclosure, consider the following questions:

Hope Industrial goes a step further to meet these industrial ratings by certifying products through Underwriters Laboratories, who puts Hope Industrial products through rigorous environmental tests before certifying that they meet these industrial standards (see UL 50E for more information).

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When evaluating products for use in industrial environments, it is important to determine whether the manufacturer is "self-certifying" or whether the products have undergone outside testing and certification.

Hope Industrial Systems uses two standards for rating the ability of industrial displays and accessories to withstand harsh industrial environments: IP ratings and NEMA ratings. Ingress Protection (IP) ratings were developed in Europe and are used internationally. NEMA ratings (also called NEMA Type ratings) were developed by the U.S.-based National Electrical Manufacturers Association. Hope Industrial tests and rates products to both standards and uses additional outside testing to certify to the NEMA standard.

Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and windblown dust); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain, sleet, snow, splashing water, and hose directed water); and that will be undamaged by the external formation of ice on the enclosure. Note: if using a Hope Industrial monitor outdoors, the brightness of the monitor may be insufficient for clear viewing when exposed to direct sunlight.

Hope Industrial Systems provides industrial monitors and accessories in four different IP ratings: IP20, IP22, IP54, and IP65/IP66.

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While NEMA and IP ratings are not identical, they are very similar and can often be used interchangeably for the purpose of rating enclosures for industrial environments. IP ratings specify standards primarily for protection against ingress of solid foreign objects or liquids, while NEMA ratings also specify protection against other conditions, such as the presence of corrosive agents. This chart gives an approximate comparison of the NEMA and IP ratings used by Hope Industrial:

IP ratings have two numbers: the first digit in the rating indicates the enclosure's ability to protect against the ingress of foreign solid objects, such as dust; the second digit indicates the level of protection against the ingress of water or other liquids.

Enclosure constructed with all of the protection of the NEMA 4 rating plus protection against corrosion of the enclosure. Hope Industrial Systems products with this rating are typically constructed of stainless steel or polyester.

Ingress Protection (IP) ratings are standards for the degree of protection an electrical enclosure provides for users from internal electronics and for the electrical components inside against the ingress of foreign objects and water.

Enclosures are constructed for indoor use to provide a degree of protection to personnel against access to hazardous parts and to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt).

Hope Industrial Systems provides industrial monitors and accessories in five different NEMA ratings: NEMA 1, 2, 12, 4, and 4X.

Enclosures are constructed for indoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt); and to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (dripping and light splashing).

The U.S.-based National Electrical Manufacturers Association (NEMA) provides a rating system to classify industrial enclosures based on their ability to protect users from internal electronics and internal electronics from the external environment. NEMA ratings only apply to products going to North America.