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NEMA 3 Enclosure, Box & Cabinet Designs

Nemaco Technology's Reference Section for the
Type NEMA 3 Enclosure, Box & Cabinet Designs
in powdercoated steel, aluminum and stainless steel.

NEMA 3 Enclosure - Rain & Water Resistant for Electrical Wiring & Controls with rain shield & environmental dust seals

Welcome to Nemaco Technology's reference section that provides technical information for NEMA 3 enclosure specifications. Nemaco has dedicated a technical section for NEMA 3 enclosures, cabinets and boxes. In this section for the NEMA 3 enclosures, you will find the basic information for the NEMA 3 rating, definition (specification) and related enclosure applications. And listed below in the notes section, a comparison is done between the NEMA 3 enclosure and the NEMA 3R enclosure. Also, Nemaco can help you with NEMA 3 enclosure application. Call Nemaco for your particular industrial, commercial or military enclosure application.

Enjoy the material that we have prepared for you, and if you have any questions, please contact Nemaco by telephone or complete our contact form.

NEMA 3 Type Enclosure Ratings & Definitions

Definition Intended for indoor use primarily to provide a degree of protection against (hand) contact with enclosed equipment.

Notes for NEMA 3 Enclosure

Note 1: Usually, a lower to medium cost enclosure depending upon many factors: enclosure size, materials (carbon steel, aluminum, stainless steel, etc.), finish coatings (powder coat, paint, marine epoxy, anodized for aluminum, etc.) and any other unique specifications.

Note 2: NEMA 3 Enclosure should have environmental gaskets or seals to keep out any windblown dust according to the NEMA 3 enclosure specification. But a NEMA 3R enclosure does not require to keep out windblown dust and therefore, typically, a NEMA 3R enclosure is not required to have have environmental gaskets or seals.

NEMA 3 Enclosure Applications

Indoor Lab or Industrial Structure Example

A typical example of NEMA 3 enclosure would be a metal box used for electrical controls in a lab or any indoor environment that is dry and but there might be dripping pipes.

Outdoor Electrical Controls or Junction & Pull Box Example

A typical example of NEMA 3 enclosure would be a metal box used for electrical controls on generator skid or rotating equipment. The advantage of the NEMA 3R Enclosure has seals to keep out windblown dust and also, it can resist falling rain. In a cold environment, the NEMA 3 enclosure should have some resistance to the formation of ice so it can be opened and closed. Therefore, the NEMA should resist water on the seals if possible and the water should drip off the enclosure.

Call or send Nemaco if you have any questions about your particular NEMA 3 enclosure application and unique specifications.

ADDITIONAL NEMA ENCLOSURE SPECIFICATIONS & PHOTOS EXAMPLES FOR REFERENCE

NEMA ENCLOSURE DEFINITIONS & RATINGS

NEMA 1 Enclosure Rating

Definition: Intended for indoor use primarily to provide a degree of protection against (hand) contact with enclosed equipment.

Applications: Nemaco can offer a NEMA 1 enclosure for your application. NEMA 1 industrial enclosures are typically used for protecting controls and terminations from objects and personnel. This style of enclosure, while offering a latching door, does not have a gasketed sealing surface. NEMA 1 enclosures are used in applications where sealing out dust, oil, and water is not required. Motor start/stop stations are often housed in NEMA 1 enclosures. Usually, a low cost enclosure but suitable for clean and dry environments. Custom Tigerbox™ enclosures are available for electronics applications.

NEMA 2 Enclosure Rating

Definition: Intended for indoor use primarily to provide a degree of protection against limited amounts of falling dirt and water.

Applications: NEMA 2 industrial enclosures are typically used for protecting controls and terminations from objects and personnel. This style of enclosure, while offering a latching door, does not have a gasketed sealing surface. NEMA 2 enclosures are used in applications where sealing out dust, oil, and water is not required. Motor start/stop stations are sometimes housed in NEMA 2 enclosures. This is a low cost enclosure also. Custom Tigerbox™ enclosure are available for electronics applications.

NEMA 3 Enclosure Rating

Definition: Intended for outdoor use primarily to provide a degree of protection against windblown dust, rain, and sleet; undamaged by ice which forms on the enclosure.

NEMA 3 Enclosure - Rain & Water Resistant for Electrical Wiring & Controls with rain shield & environmental dust seals - Nemaco Technology - USA Applications: NEMA 3 electrical enclosures are typically used in outdoor applications for wiring and junction boxes. Nemaco of this style of enclosure provides protection against windblown dust, falling rain, sleet, snow, and external ice formation. Indoors the enclosure designed to protect against dripping water. Note that this style of enclosure has a gasket sealing surface. Nemaco installs stick gaskets and continuous gasket if required. Some NEMA 3R enclosure models have hasps for secure padlocking.

Here is custom NEMA 3R enclosure manufactured by Nemaco Technology. Note that the photo of the yellow powder coated enclosure is unique since it has stainless steel rotary turn latch instead of a common and ordinary pull latch. This was a custom NEMA 3R enclosure designed for a customer that wanted easy access to the enclosure and a secure latch for sealing the door seal.

NEMA 3 Enclosure - Rain & Water Resistant, Interior Environmental Dust Seal - Nemaco Technology - USA

Also, in the next photo of this yellow NEMA 3R enclosure, the inside sub-panel is aluminum instead the standard powder coated carbon steel. The aluminum sub-panel provides better heat transfer than a powder coated carbon steel plate that other companies provide.

The Tigerbox™ NEMA 3 Enclosures are available with durable gasket seals for both indoor and outdoor applications. Call Nemaco for any NEMA NEMA 3 enclosures in powder (coated carbon steel, aluminum) and perhaps 304 or 316 stainless steel for speciality applications.

NEMA 3R Enclosure Rating

Definition: Intended for outdoor use primarily to provide a degree of protection against falling rain and sleet; undamaged by ice which forms on the enclosure.

Applications: NEMA 3R electrical enclosures are typically used in outdoor applications for wiring and junction boxes. This style of enclosure provides protection against falling rain, sleet, snow, and external ice formation. Indoors they protect against dripping water. Note that this style of enclosure does not require a gasket sealing surface. Some models have hasps for padlocking. The Tigerbox™ NEMA 3 Enclosures are available with optional gasket seals for both indoor and outdoor applications.

NEMA 4 Enclosure Rating

Definition:Intended for indoor use primarily to provide a degree of protection against windblown dust and rain, splashing water, and hose directed water; undamage by ice which forms on the enclosure.

NEMA 4 Enclosure, Front Lexan Plastic Window.  Nemaco Technology - USA Applications: NEMA 4 industrial enclosures are used in many applications for occasional washdown occurs or where machine tool cutter coolant is used and sprayed. Also, the Nema 4 enclosure serve well in applications where there is possibly dripping water in a building. NEMA 4 enclosures must have quality seal gasket to prevent water ingress and the door is typically clamped for maximum sealing. Nemaco installs stick gaskets and continuous seals depending the size of the enclosure. Tigerbox™ Nema 4 are commonly have continuous hinges, mounting feet and sometimes padlock hasps. Tough Tigerbox™ NEMA 4 enclosures are available in sizes from small wall mounts to two-door floor mount enclosure models. Nemaco has an NEMA 4 enclosure example shown in the photo.

NEMA 4X Enclosure Rating

Definition:Intended for indoor or outdoor use primarily to provide a degree of protection against corrosion, windblown dust and rain, splashing water, and hose directed water; undamaged by ice which forms on the enclosure.

NEMA 4X Enclosure - Nemaco Technology - USA Applications: NEMA 4X enclosures are typically made of stainless steel or plastic. These NEMA enclosures are used in harsher environments than standard NEMA 4 units. Applications where corrosive materials (for example saltwater) and caustic cleaners are used necessitate the use of a NEMA 4X enclosure. A few examples are applications for sanitary poultry processing facilities (where total washdown with disinfectants occur repeatedly), petro-chemical refineries and offshore drilling platforms for oil and natural gas. NEMA 4X is used when protection from the worst environments is required. NEMA 4X industrial enclosures are available in sizes from small wall mounts to two-door floor mount models. Nemaco Technology manufactures the enclosures from 304 & 316 Stainless steel. Also, the Tigerbox™ NEMA 4X enclosures are available in 304 & 316 stainless steel. Tough Tigerbox™ Nema 4X enclosures are available with continuous hinges, mounting feet and sometimes padlock hasps. Tigerbox™ NEMA 4X enclosures are offered in sizes from small wall mounts to two-door floor mount enclosure models. Also, stainless steel passivation for additional corrosion protection is available on request for all the stainless steel products. Nemaco has a NEMA 4X enclosure shown in the photo.

NEMA 6 Enclosure Rating

Definition:Intended for indoor or outdoors which occasional temporary submersion is encountered.

Applications: NEMA 6 enclosures are typically made of carbon steel, stainless steel or plastic. These NEMA 6 enclosures are used for many application to protect equipment from temporary submersion in water but not any salt water, acidic fluids, oils or flammable. A few examples are applications for any heavy washdown for cleaning or temporary submersion from rainwater but not prolonged. The Tough Tigerbox™ NEMA 6 enclosures are available in carbon steel, 304 & 316 stainless steel and available with continuous hinges, mounting feet and sometimes special fittings for applications. Tigerbox™ NEMA 6 enclosures are offered in sizes from small wall mounts to single-door medium size floor mount styles. Also, stainless steel passivation for additional corrosion protection is available on request for all the stainless steel products.

NEMA 6p Enclosure Rating

Definition:Intended for indoor or outdoors which occasional prolonged submersion is encountered. Corrosion protection is required.

NEMA 6P Enclosure Applications: NEMA 6p enclosures are mostly made of 304/316 stainless steel for industrial applications and sometimes plastic for inexpensive electronics. Nemaco Technology offers the NEMA 6P only in stainless steel (304,316). The NEMA 6p enclosures are used applications in applications where more protection is needed and there might be water submersion. Applications where corrosive materials (for example saltwater) and caustic cleaners are used necessitate the use of a NEMA 6 enclosure. Tough Tigerbox™ Nema 6p enclosures are available with special configurations that are unique for each customer's applications. And the Tigerbox™ NEMA 6p enclosures are offered in sizes from small wall mounts to two-door floor mount enclosure models. Also, stainless steel passivation for additional corrosion protection is available on request for all the stainless steel products.

NEMA 7 Enclosure Rating

Definition: Enclosures are for indoor use in locations classified as Class I, Groups A, B, C, or D.

Applications: NEMA 7 enclosures are mostly made of heavy cast iron, cast stainless steel or cast aluminum. The cover flange and the base flange are machined flat and even for a type surface fit. The enclosures are typically used in facortories, chemical refineries or offshore drilling platforms.

NEMA 9 Enclosure Rating

Definition: Enclosures are intended for indoor use in locations classified as Class II, Groups E, F, or G, and shall be capable of preventing the entrance of dust. Enclosed heat generating devices shall not cause external surfaces to reach temperatures capable of igniting or discoloring dust on the enclosure or igniting dust-air mixtures in the surrounding atmosphere. Enclosures shall meet dust penetration and temperature design tests, and aging of gaskets (if used).

Applications: NEMA 9 enclosures are mostly made of heavy cast iron, cast stainless steel or cast aluminum. The cover flange and the base flange are machined flat and even for a type surface fit. The enclosures are typically used in facortories, chemical refineries, offshore drilling platforms or dusty environment.

NEMA 12 Enclosure Rating

Definition: 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 against dripping and light splashing of liquids.

NEMA 12 Enclosure, Powder Coated, 1/4 Turn Latches Rating: Dust Proof & Water Resistant

Applications: NEMA 12 enclosures are designed to prevent the ingress of dust, water, and oil. NEMA 12 enclosures are most often used for indoor applications of automation control and electronic drives systems. Some examples are packaging, material handling, non-corrosive process control, and manufacturing applications. Gasketed doors seal the enclosure's contents from airborne contaminants and non-pressurized water and oil. Nemaco offers the NEMA enclosures in sizes from small wall mounts to two-door floor mount models. Nemaco has a NEMA 12 enclosure example shown in the photo.

Notes for NEMA 4 & 12 Combined Enclosures

Nemaco's 4/12 enclosures combine the attributes of NEMA 4 and NEMA 12 ratings in one attractive, clean line enclosure. This enclosure features reversible doors for left or right opening, concealed hinges or removable hinges available and mounting feet are available for conventional wall mounting. Sometimes rear mounting holes with seals are available for a more attractive installation. Nemaco's enclosures are available from small sizes to large buildings.

Call Nemaco Technology for NEMA 3 enclosure designs.

Note: Nemaco Technology, LLC has provided this information as courtesy to potential customers and engineering companies for basic conceptual information and applications. Customers should select enclosures and materials based on their particular application. All of the contents of this website is the property of Nemaco Technology, LLC. All rights reserved. The information is subject to change without notice.

Nemaco Technology Reference Section: Nema 3 Enclosure, Box, Cabinet - Definition & Rating

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