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Types of Nema Enclosures



Electronic and electrical products have become ingrained in our daily lives. It’s difficult to imagine a situation in modern life where they aren’t there. While solid-state construction, printed circuit boards, and microchip technology have improved the durability of electronic components, it is crucial to remember that electronics are still subject to damage and failure. It is also critical that end-users are provided with a safe product. Humans, animals, and equipment can all be harmed by electricity at any amperage. Everyone is protected when components are properly shielded from the entrance of extraneous items, human touch, or animal penetration. Electrical enclosures are used by device designers and builders to shield critical electronics and protect consumers to meet both of these demands. In this article, we’ll discuss what Nema enclosures are and the types of Nema enclosures.

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What is a Nema Enclosure

Free Standing Enclosures
Source: https://cdn-cdagd.nitrocdn.com

Enclosures made to protect electrical components from the elements are known as NEMA enclosures. Devices in a NEMA enclosure are protected in the following ways, depending on the NEMA rating:

Outdoor enclosures can be both waterproof and dustproof, for example, can overlap with other enclosure kinds. However, familiarity with NEMA enclosure ratings and other rating systems that offer a standard for an enclosure’s level of protection is necessary to make an informed assessment of its protective features.

NEMA enclosures not only protect the equipment inside, but they can also protect people and property in the surrounding area:

Types of Nema Enclosures

Type 3R Electrical junction box
Source: Pinterest

The National Electrical Manufacturers Association (NEMA) establishes guidelines for several types of electrical enclosures used in industrial settings. Each is rated for personal access to hazardous parts as well as other type-specific designated environmental conditions.

The following is a list of NEMA enclosure types, which are further specified in NEMA 250- Electrical Equipment Enclosures. Each category provides the properties of an enclosure, but not the size of the enclosure, for example. The lower-numbered tests are not included in the higher numbers. Types 3, 4, and 6 are, for example, designed for outdoor use, whereas type 5 is not. Continue reading the list below for more information on the different Nema ratings we offer.

Type 1

1 Electrical cabinet
Source: Pinterest

Type 1 enclosures can be used for a variety of purposes and are designed to be used indoors. Dust, light, and indirect splashing are all protected, although it is not dust-proof. Prevents accidental interaction with enclosing equipment in the first place. To supply you with a quality enclosure for most simple applications, it is important to comply with NEMA regulations.

They are only meant to be used indoors for ordinary purposes. They, like all NEMA enclosures, safeguard employees from coming into contact with the enclosed equipment by accident. The encased equipment is protected from falling dirt.

Type 2

Nema Enclosure Type 2 Electrical standard
Source: Pinterest

A NEMA 2 enclosure is waterproof. They provide the same level of protection as a NEMA Type 1 enclosure, but they additionally protect contained devices from non-corrosive liquid dripping and mild splashing. They’re usually equipped with drip shields. They’re used in places where there’s a lot of condensation, such as laundry rooms and near air conditioners, freezers, and other cooling equipment.

Type 3

Type 3 Electrical cabinet
Source: Pinterest

The NEMA Type 3 enclosure is weatherproof. NEMA type 3 enclosures can be utilized both indoors and outside. They, like all NEMA enclosures, safeguard employees from coming into contact with the enclosed equipment by accident. NEMA type 3 enclosures protect against falling dirt, rain, sleet, snow, and windblown dust. Sleet or freezing rain that forms an external ice layer on the enclosure will not affect it.

In comparison to a NEMA 3 enclosure, a NEMA 3X enclosure possesses corrosive resistance.

Type 3R

It’s designed to be used outside. Provides some protection from falling rain and the creation of ice. Built (with knockouts on the sides and bottom) to prevent beating rain from interfering with the apparatus’s successful operation or causing soaking of live parts and wiring within the enclosure under defined conditions.

Please be aware that these are not rain-tight, which means that under certain situations, exposure to beating rain could result in water entering a Type 3R enclosure; they are also not water-tight, which means that moisture could enter a Type 3R enclosure when exposed to a stream of water.NEMA 3R enclosures are designed for power distribution, lighting contractors, switchgear, and other electrical components that must be protected in an outside environment.

Type 3S

A NEMA 3S enclosure has all of the same protective qualities as a NEMA type 3 enclosure, with the added benefit of keeping any external mechanisms (handles, pushbuttons, etc.) functional even when iced over.

In comparison to a NEMA 3S enclosure, a NEMA 3SX enclosure has corrosive resistance.

Type 4

Nema 4 Wall mount enclosure
Source: Pinterest

Type 4 enclosures are weathertight (weatherproof). Designed to guard against falling dirt, rain, sleet, snow, windblown dust, splashing water, and hose-directed water whether used indoors or outdoors. The external growth of ice on the enclosure will not affect it. When extreme environmental protection is required. These NEMA 4 enclosures are powder-coated carbon steel and come in a range of sizes and configurations, including wall-mounted, free-standing, and JIC.

Type 4X

Type 4X enclosure is similar to type 4 with the exception that it is made of corrosion-resistant material. Corrosion-resistant is described as Constructed to provide a degree of protection against corrosive agents such as salt spray, as determined by industry standards. These enclosures are made of 5052-H32 aluminum, 304/304L stainless steel, or 316/316L stainless steel by Nema Enclosures, and they come in a variety of styles.

Stainless steel, in any form, is not “stain-free,” and while it provides a high level of performance, it is prone to rust deposits on the surface under specific environmental circumstances. Contamination from rain or saltwater settings is a common cause of these deposits.

Type 6

Carlon 6 stainless steel
Source: Pinterest

NEMA 6 enclosures can be used both indoors and outdoors. They, like all NEMA enclosures, safeguard employees from coming into contact with the enclosed equipment by accident. NEMA 6 enclosures protect against falling dirt, water from the hose-directed spray, and submersion for a certain time and depth. Similar to the other Nema enclosures they are not affected by drips, sleet, or freezing rain forming an exterior ice layer on the enclosure.

Type 12

Nema 12 Wall mount enclosure
Source: Pinterest

They are constructed (without knockouts) for indoor use to give personnel some protection from dangerous parts. Provides some protection to the equipment inside the enclosure from solid foreign object intrusion (falling dirt and circulating dust, lint, fibers, and flyings). Gasketed doors keep airborne pollutants, non-pressurized water, and oil out of the enclosure. NEMA 12 enclosures are designed primarily for indoor industrial, manufacturing, and machining applications and are manufactured by Nema Enclosures.


You can easily find a suitable enclosure for the work and assure the safety and reliability of the product and its end-user by paying attention to the capabilities and requirements of your project. E-abel is always delighted to assist our customers in selecting the appropriate NEMA enclosure type. Contact us for more information.

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