NEMA Knowledge Base

IEC IP table

This table demonstrates the NEMA ratings and their equivalect IEC IP codes.


Nema Boxes: Protecting Your Electronics From The Environment

The National Electronics Manufacturers Association came up with a system of ratings to differentiate between the protection capabilities of storage and mounting boxes for electronic equipment. These are typically known as NEMA Ratings. Similar to the IEC IP codes, NEMA Ratings are intended to create a simple standard for all enclosures for electronic devices.

With electronic devices in a wide range of settings, these ratings can go all the way from simple enclosures that avoid indirect contact with environmentals such as water or dirt. While the higher rated cases can protect against caustic substances, strong impacts, and in some cases even total submersion.

A full list of NEMA enclosure types is available here.
If you would like more information or would like to see how NEMA boxes can help you, please fill out the request form at the bottom of the page.


Nema Cases

Many industries around the world use sensitive electronic equipment to help monitor their networks. The problem with this is that these devices can be susceptible environmental factors such as water, dust, and shock. In order to ensure that no gear is damaged and any outages are experienced, many companies began to manufacture protective cases. In order to make it easy to compare the relative strengths and tolerances of various equipment, a standard of measurement called NEMA Ratings came to be.

The National Electronics Manufacturers Association came up with a system of ratings. These are typically known as NEMA Ratings. Similar to the IEC IP codes, NEMA Ratings are intended to create a simple standard for all enclosures for electronic equipment.

With electronic devices in a wide range of atmospheres, these ratings can go all the way from simple enclosures to avoid indirect contact with harmful environmental elements. While the higher rated cases can protect against caustic substances, strong impacts, or even total submersion.

A full list of NEMA enclosure types is available. For more information, please fill out the request form at the bottom of the page.


NEMA Type 1 Enclosure

In order to protect valuable equipment as well as personell, many devices are housed inside of protective cases. With manufacturing tolerances varying from company to company, several standards of measurement have been implemented over the years. The most common rating system is the NEMA standards. Similar to the IEC IP codes, the NEMA types are a standard of protection abilities ranked based upon testing requirements.

NEMA Type 1 enclosures are rated as the lowest protection level of the NEMA standards. Providing no water or dust resistance, these cases are typically used as storage lockers. They're also used as equipment housings and preventative safety measures.

Type 1 NEMA enclosure standards:

  • Provides protection against ingress of solid foreign objects such as falling dirt or debris.
  • Exhibits a measurable level of protection for personnel from hazardous equipment or parts.
  • Latching door to prevent accidental exposure.
  • Exceeds IEC IP20 standards.

While these protective housings are built to a common standard, they do not provide protection against many dangers. Equipment inside is vulnerable to corrosion, dust, oil, water, or extreme conditions.


NEMA 12 And 12K Enclosures

Technicians and equipment operators know that in order to efficiently provide the services needed to run a business, their safety as well as that of their electronic equipment must be ensured no matter what conditions they may operate in. NEMA ratings serve as a standard of measurement for the protection levels offered by storage cases and enclosures.

NEMA 12, as well as 12K, rated enclosures are intended to be used in indoor industrial applications. Used as a general purpose storage or equipment enclosure, these units are designed to withstand a whole range of conditions that could effectively render electronics useless.

NEMA 12 standards:

  • Protects against: Falling dirt, dripping noncorrosive liquids, dust, lint, and rust.
  • Prevents damage from build up of liquids on the exterior of the enclosure.
  • Oil-resistant door gaskets help seal off from ingress of harmful substances.

NEMA 12K standards:

  • Offers same protections as NEMA 12 rated cases.
  • Designed with knockouts to allow for easy installation of cables, conduit, or ventilation.

Type 3R NEMA Enclosure Rating

Many industries require housings for their equipment to be built at a level to withstand certain conditions. In order to protect sensitive, and often costly, equipment, cases are built to a variety of protection standards. With tolerances varying from company to company, a universal standard of measurement was created.

NEMA Type 3R enclosures are designed to offer protection to equipment and personnel in a wide variety of environments. Enclosures built to this standard are intended for conditions that are more extreme than Type 1 cases.

Type 3R NEMA enclosure standards:

  • Built for either outdoor or indoor applications.
  • Exhibits a measurable level of protection for personnel from hazardous equipment or parts.
  • Protects internal equipment from ingress of falling dirt.
  • Provides a degree of protection against rain, sleet, and snow.
  • Remains uncompromised due to external formation of ice on the enclosure.

While these protective housings are built to a common standard, they do not provide protection against corrosion, dust, oil, pressurized water, or extreme conditions.


NEMA Type 4 Enclosure Rating

Type 4 NEMA cases are intended for use in a variety of situations. With builds designed for indoor as well as outdoor applications, they provide a durable security measure against damaged equipment as well as protection for personnel against dangerous gear.

Many industries require housings for their equipment to be built at a level to withstand certain conditions. In order to protect sensitive, and often costly, equipment, cases are built to a variety of protection standards. With tolerances varying from company to company, a universal standard of measurement was created.

Type 4NEMA enclosure standards:

  • Protects against falling dirt and debris, while offering protection against windblown dust
  • Resists ingress of water (rain, snow, sleet, splashing water, and hose directed water)
  • Retains integrity even during conditions that allow ice to form on the outside of the enclosure

Type 4X NEMA Ratings

Type 4X NEMA cases are intended for use in a variety of situations. With builds designed for indoor as well as outdoor applications, they provide a durable security measure against damaged equipment as well as protection for personnel against dangerous gear.

Many industries require housings for their equipment to be built at a level to withstand certain conditions. In order to protect sensitive, and often costly, equipment, cases are built to a variety of protection standards. With tolerances varying from company to company, a universal standard of measurement was created.

Type 4X NEMA enclosure standards:

  • Protects against falling dirt and debris, while offering protection against windblown dust
  • Resists ingress of water (rain, snow, sleet, splashing water, and hose directed water)
  • Retains integrity even during conditions that allow ice to form on the outside of the enclosure

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