Nemaco™ - NEMA Electrical Enclosures, Boxes & Cabinets
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Ratings 1, 2, 3R, 4, 4X, 6, 6P, 12

Reference Section for NEMA Electrical
Enclosures, Boxes & Cabinets

Welcome to the electical enclosure section that provides information for many types of NEMA elecrical enclosures, cabinets and boxes. Nemaco has dedicated this NEMA elecrical enclosures section as an overview of the many types of cust NEMA electrical enclosures and styles available. In other words, this is a basic summary of the enclosures available and types of standard and ratings for each enclosure if applicable. In the other specialized technical reference sections there are detailed descriptions available of the each type of custom NEMA electrical enclosures and Tigerbox™ enclosures. Nemaco provides some samples of the custom NEMA type enclosures in the the other sections. Nemaco has the manufacturing resources to bend, punch, cut, deburr, drill, sand blast and surface finish custom metal products for almost any application. Also, the other technical sections provide many internal and external photos of the custom enclosures. Of course you can call Nemaco for additional information for any of Nemaco's Tigerbox products or any of the custom NEMA type electrical enclosures, cabinets or boxes.

Nemaco has the manufacturing resources to bend, punch, cut, deburr, drill, sand blast and surface finish custom metal products for almost any application. Also, Nemaco has many other resources available to special cleaning, finishing and coatings the custom electrical enclosure applications.

Enjoy the material that we have prepared for you, and if you have any questions, please contact Nemaco by telephone (as listed below) or complete our contact form. We will be glad to help you with Nema custom electrical enclosures, cabinets and boxes on your projects.

Nemaco is the Top Source for NEMA elecrical enclosures

As an NEMA elecrical enclosures enclosure source, we offer a wide selection of products that range from custom metal brackets to 304/316 stainless steel cooled NEMA 4X electrical enclosures. However, Nemaco's main product line is the NEMA electrical enclosures for huge array of commercial and industrial applications. For some common size enclosures, Nemaco has some product stock that can ship to to customers quickly. But the main advantage that Nemaco offers is high quality custom enclosures with reasonable product delivery.

Nemaco offers Stainless Steel Electrical Enclosures that are both non-rated and NEMA 4x rated for customer applications. The Tigerbox™ style electrical enclosures are manufactured in product families that include JIC continuous hinge cover enclosures, lexan clear windows, single door enclosures, dual-access double door enclosures, drip shields, long-life environmental seals and custom powdercoat/epoxy paints for the each particular applicsation.

And Nemaco offers Carbon Steel Electrical Enclosures that include the NEMA 4 and NEMA 12 ratings. The product selection does include JIC wall mounted enclosures, single door enclosures, Tigerbox⁜ series enclosures, free-standing single door and double door enclosures and floor mounted double door enclosures. Except for the Vision series where back panels are optional, all other Carbon Steel electrical enclosures are supplied with the available back panels for the listed price. The panels are made from 14 gauge cold-rolled steel.

Our Aluminum Electrical Enclosures are available in non-rated and NEMA 4x rated styles and include the following series: single door enclosures, JIC continuous hinge enclosures, even and smooth cover enclosures, small screw cover enclosures, screw cover enclosures, hinged screw cover enclosures, turn latch (twist latch) enclosures, quick release latch enclosures, large electrical control enclosures and pushbutton controls enclosures.

Since Nemaco can offer a large selection, economical prices for high quality NEMA electrical and electronic enclosures, economical ground shipping, customization for your project, then Nemaco is the ideal electrical supply source for your custom electrical enclosure needs.

Nemaco would like to present some interesting information about stainless steel materials, processes and applications related to NEMA electrical enclosures.

History of Stainless Steel - Interesting Info

Harry Brearley, who was born in Sheffield, England, in 1871, probably invented stainless steel. His father was a steel melter and through private study and night school he became an expert in the analysis of steel and its production. In 1908 Brearley was given the opportunity to set up the Brown Firth Laboratories, which was financed by the two leading Sheffield steel companies of the day. In 1912 Brearley was asked to help solve the problems being encountered by a small arms manufacturer, whereby the internal diameter of rifle barrels was eroding away too quickly because of the action of heating and discharge gases. Brearley was therefore looking for a steel with better resistance to erosion, not corrosion. As a line of investigation he decided to experiment with steels containing chromium, as these were known to have a higher melting point than ordinary steels. Using first the crucible process, and then more successfully an electric furnace, a number of different melts of 6 to 15% chromium with varying carbon contents were made. The first true stainless steel was melted on the 13th August 1913. It contained 0.24% carbon and 12.8% chromium. At this time Brearley was still trying to find a more wear-resistant steel, and in order to examine the grain structure of the steel he needed to etch (attack with acid) samples before examining them under the microscope. The etching re-agents he used were based on nitric acid, and he found that this new steel strongly resisted chemical attack. He then exposed samples to vinegar and other food acids such as lemon juice and found the same result. At the time, table cutlery was silver or nickel plated. Cutting knives were made of carbon steel, which had to thoroughly washed and dried after use, and even then rust stains would have to be rubbed off using carborundum stones. Brearley immediately saw how this new steel could revolutionise the cutlery industry but he had great difficulty convincing his more conservative employers. On his own initiative, he than had knives made at a local cutler's, R.F. Mosley. To begin with, Brearley referred to his invention as "rustless steel". It was Ernest Stuart, the cutlery manager of Mosley's who first referred to the new knives as "stainless" after, in experiments, he had failed to stain them with vinegar. "Corrosion resisting" steel would be really the better term, as ordinary stainless steels do suffer corrosion in the long term in hostile environments.

Other grades of Stainless Steel Invented

Most of the standard grades still in use today were invented in the period 1913 to 1935, in Britain, Germany, America and France. Once these standard grades became accepted, the emphasis changed to finding cheaper, mass-production methods, and popularising the use of stainless steel as a concept. This tended to stifle the development of new grades. However, after the Second World War, new grades with a better weight-to-strength ratio were required for jet aircraft, which led to the development of the precipitation hardening grades such as 17:4 PH. From the 1970s onwards the duplex stainless steels began to be developed. These have far greater corrosion resistance and strength than the grades developed in the 1920s and are really the future for the increasing use of stainless steel.

Also, Nemaco has listed the common benefits of stainless steel for enclosures and many other custom metal applications.

Benefits of Stainless Steel for NEMA Electrical Enclosures

Corrosion Resistance
Note this is one of the most important benefits of stainless steel. Lower alloyed grades resist corrosion in atmospheric and pure water environments, while high-alloyed grades can resist corrosion in most acids, alkaline solutions, and chlorine bearing environments, properties which are utilised in process plants. Many of Nemaco's customers are looking for good corrosion resistances for enclosures.

Fire & Heat Resistance
Special high chromium and nickel-alloyed grades resist scaling and retain strength at high temperatures.

Sanitary Hygiene
The easy cleaning ability of stainless makes it the first choice for strict hygiene conditions, such as hospitals, kitchens, abattoirs and other food processing plants.

Good Aesthetic Appearance
The bright, easily maintained surface of stainless steel provides a modern and attractive appearance.

Tough Stuff ...... Strength-to-Weight Ratio Advantage
The work-hardening property of austenitic grades, that results in a significant strengthening of the material from cold-working alone, and the high strength duplex grades, allow reduced material thickness over conventional grades, and therefore cost savings.

Ease of Fabrication
Modern steel-making techniques mean that stainless steel can be cut, welded, formed, machined, and fabricated as readily as traditional steels. This has become true for metal enclosure and car manufacturing.

Impact Resistance
The austenitic microstructure of the 300 series provides high toughness, from elevated temperatures to far below freezing, making these steels particularly suited to cryogenic applications.

Long Term Value - Good Investment
When the total life cycle costs are considered, stainless is often the least expensive material option.

Stainless Steel for Enclosures


Stainless Steels Grades Commonly Used for NEMA Electrical Enclosures & other applications

Stainless steel is not a single specific material - it is the name given to a group of corrosion-resistant steels containing a minimum of 11% chromium - varying additions of nickel, molybdenum, titanium, niobium and other elements may also be present. The mechanical properties and behaviour in service of each type of steel depends upon its composition and consequently a carefully considered choice of steel is vital.

There are five classes of stainless steel, namely Martensitic, Ferritic, Austenitic, Duplex and Precipitation Hardening:

The Martensitic types may be strengthened and hardened by heat treatment, in the same way as plain carbon steels, but the Ferritic steels, which in general have lower carbon and higher Chromium contents, do not respond in this way.

Martensitic and Ferritic steels are magnetic.

Ferritic stainless steels contain chromium usually in the range 11 to 18%. They are magnetic, have moderate corrosion resistance and are not susceptible to stress corrosion. Austenitic stainless steels contain nickel as well as chromium, and are sometimes referred to by the generic title 18/8, i.e. 18% chromium, 8% nickel, although the actual composition may vary widely from these figures. They are non-magnetic and cannot be hardened by heat treatment, although they strain harden rapidly when cold worked. All stainless steels except hardened Martensitic steels are ductile and therefore can be formed, but the Austenitic types are outstanding in this respect. They are also amongst the most highly corrosion-resistant materials available to the designer and engineer.

Duplex stainless steels combine the optimum properties of austenitic and ferritic types. They contain 18 - 26% chromium plus 4.5 to 6.5% nickel and have good resistance to stress corrosion cracking.

Precipitation hardening stainless steels may be martensitic, semi-austenitic or austenitic. They combine the heat treat ability of normal martensitic grades with the corrosion resistance of austenitics. They are available in bar form for the production of heavy duty engineering components.

Nemaco offers NEMA Electrical Enclosures & Custom Metal Fabrication
Nemaco uses mostly 304 / 316 grades of stainless steel for electrcal enclosures. Nemaco can custom design an NEMA electrical enclosures per the customer's design specifications & material requirements. Call or send an email to Nemaco for your NEMA electrical enclosures, cabinets and custom metal fabrication projects.

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