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The Customization of The NEMA 4 And 4X /Enclosures For Class 1/Division 2 Hazard Protection

It is very important to carefully evaluate the hazardous and operational conditions, before actually ordering industrial electrical enclosure and panel. Apart from securing your components, electrical enclosures also impact the security of those in the vicinities and surroundings. Operators, staff/employees, and many other people may be adversely affected when an improper electrical enclosure with an incorrect rating has been installed.


The basic steps for finding out the current electrical enclosure for an operational environment where hazardous gases are always present include:

•Finding out the NEMA environment rating.

•Determining and finding out the NEC (National Electric Code) explosion protection classification.

•Knowing more about the pressurization and purge type.

•Finding out and specifying the electrical enclosure with the right rating.

Remember that customization and modernization are necessary, and there will be no “one size fits all” solution available for electrical enclosures.

NEMA 4 and 4X Enclosures

The NEMA 4 and 4X electrical enclosures for Class 1 and Class 2 hazardous environment should be customized so that they can overcome the hazardous threats. Electrical enclosures with a NEMA rating of 4 are basically watertight. These electrical enclosures can also resist the formation of ice, dust blown weather, cold conditions, and can also resist hose-directed water and splashing. The 4X variety has additional resistance to corrosion. Therefore the 4X enclosure can only be made of aluminum or stainless steel.

The Hazardous locations may have flammable water vapors and gases, combustible gases and vapors, and/or ignitable vapors present in the atmosphere. The National Electric Code (NEC) classifies the hazardous areas into various zones, divisions, and classes. The Class 1 Division 2 areas only have the flammable liquids, gases, and vapors present in an abnormal condition. But the flammable elements are present in Class 1 Division 1 conditions on a regular scale, and at all the times.

While a leading manufacturer of electrical enclosures will provide you an enclosure with the right NEMA rating, the company will not be able to certify enclosure in accordance with the NEC explosion protection criteria. The operation conditions differ and hence proper customization of the enclosure is necessary before its installation.

Containing the Threat of Explosion

For an explosion to occur in a hazardous environment, the 3 important elements that should be present include heat, oxygen, and flammable substance/fuel. To prevent an explosion, the internal explosion can be contained, or one or more than one of the necessary components for the explosion to occur should be removed.

Pressurization and Purging

Pressure can be created within the enclosure (by using clean or some inert air). This will prevent outside air (containing flammable vapors/gases) to reach the inside of the enclosure. A purge control system and a gasket will create an impregnable seal. Such enclosures have the interlock feature through which access can be provided to their interiors. The NFPA (National Fire Protection Association) has the classification of the pressurization systems. They can be Type X, Type Y or Type Z. These systems vary in the kinds of equipment they can store, the features and capabilities they have, and the divisions in which they can be used.

Customization of the Electrical enclosure in Class 1 Division 2 Environment

The Class 1 Div 2 enclosure may use the right materials and components so that it can overcome the effects of temperature, have the right pressure, and prevent the entrance of the flammable gases to the insides. They are created using the matching gaskets, hinges, cutouts, mechanical interlocks, timer mountings and other kinds of components.

You can consult a reputed supplier/manufacturer of electrical enclosures to have the best solution that can well suit the demands of your particular operation and hazard environment.

Related Articles

The domain of fashion illustration is extremely great but many people out there do not know that. The focus of fashion illustration is not solely bounded to human portraits as objects, jewelry and even anything related to the media is considered a part of it. It is a diverse field and if you begin to explore the realm of the fashion industry then you will be exposed to so many new features and details. The notion of drawing illustrations is becoming the norm now and those who think that they want a fashion illustration for themselves but do not know how to get on can always look for fashion illustrators for hire. Working with professional illustrators can allow you to know about the spectrum of this industry better and in turn, diversify your knowledge as well.

Here is what you need to know to draw illustrations that simply stick out:

Anatomy of the silhouette

The one thing that matters the most in a fashion illustration is the proportions of the silhouette you are drawing. Flaws in the anatomy a drawing are easily observable and correctly them consumes a lot of time. You have to practice thoroughly before you proceed to draw the actual illustration and with every stroke of line, analyze if you have kept the proportions anatomically accurate. Once you know how to master the shape and proportions of the illustration, you can easily add a clothing item and adjust it accordingly. The pose matters too and it varies on the kind of clothing your illustration figure is wearing.

Bring purpose to your illustration

Illustrations are generally static visuals but to make your fashion illustration stand out, you have to add a flair of style and persona to it. If it is like any other static visual then it would look to stagnant and boring to the viewer. Analyze what you want to draw first and who your audience then decides how much space you need on the canvas to make it look visually appealing. From the clothing items to the hair of the silhouette, every such little detail matters. If you are drawing a certain pose then it is important to display movement or the illustration would look unmoving.

Use space wisely

It is an art itself to utilize the space you have wisely. You could be drawing a scene of a park and with the extra details; your main design figure would lose its significance. A background that is cramped with too many details is never considered visually appealing so you have to smartly align the objects on a blank canvas and not necessarily consume any space that you see. Try to keep a minimalistic and simple background so that the attention of the viewer does not divert to the background but sticks to the core figure of your illustration.

Patterns in design

Patterns play a key role in clothing and there are several kinds of it. Some patterns have existed as popular trends throughout history and they are still prevailing. Since these patterns have existed for centuries, each of these also has a story to tell. If you master the notion of understanding patterns and understand how to use them in a certain illustration, the process of illustration creation will become easier for you.

Perception varies

When you look at an illustration, you build a perception about it and it is likely that your observation would not be similar to others and other people would have different views about it. That is why it is said that illustrations entirely depend upon perception and it varies from person to person. The viewer is the one that creates meaning for what he sees but if you are drawing a fashion illustration then it is better to use simplistic visuals and try not to complicate the design too much.

Design optimization

A certain style is more often used for the anatomy of fashion illustrations. Some tend to stick to sleek fashion figures while some illustrators experiment various design styles and merge them together. However, you have to create your illustration in such a manner that it brings the attention of the viewer to the exact element you want his focus to be. The anatomy of fashion illustration varies from the standard proportions and you have to chance those proportions into a design that enhances the average anatomy features that we see. 

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