The Anatomy of Electrical Enclosures

An enclosure is a cabinet used to cover electrical equipment, which is susceptible to damage or likely to cause harm to people. They are commonly used to prevent electric shock to users and to mount switches, knobs, and displays.

Electrical enclosures come in multiple shapes and sizes. Well-designed enclosures not only protect electrical devices from damage and moisture, but they are also very pleasant to look. Some of the best brands include the Rittal enclosures and Gewiss enclosures.

To prevent loses in future, it is wise to learn the anatomy of electrical enclosures before a purchase. In this guide, we have provided a brief description of the structure on an electrical enclosure.

Materials Used

The materials used to make electrical enclosures should meet the conductivity requirements and provide electrical safety. They should also be well shielded from the electromagnetic material. This is the reason why reinforced plastic and galvanised steel is preferred. Most other enclosures are commonly made of metal, aluminium, plastic, and glass.

• Stainless Steel and Carbon Steel

The Stainless steel and carbon steel are highly durable, resistant to corrosion, moisture, and even chemical damages. They are basically the most durable material for this purpose.

Stainless steel and carbon steel are the best fit in medical facilities, pharmaceuticals, and food industries because they are fungal and bacterial resistant as well.

• Aluminium

Aluminum is mainly preferred due to its light weight, strength, low costs, and its resistance to corrosion. It performs well in harsh environments and is capable of withstanding great external hits.

• Polycarbonate

Polycarbonate is durable, light, non-conductive, non-corrosive, and also non-magnetic. It is best suitable for areas that experience acidic rains. Many prefer this material since it is effortless to alter.

• Fibreglass

Fibreglass is mainly chemical resistant. This is why it is mostly used in corrosive or wet environments. It is suitable for indoor and outdoor use since it is not easily affected by temperatures.


There are different enclosure design types. Each has different material and structure based on the place of usage. The main enclosures include:

1. Industrial enclosures
2. Small enclosures
3. Terminal or Junction Box
4. E-Box enclosures
5. Bus enclosures
6. Compact enclosures and many more.

In some industries like Rittal, however, one can opt to build custom enclosures which are cut precisely according to the preferred measurements. The industrial expert should recommend the best material to use based on whether the devices are meant to be used in industrial, icy, or even dry places.

Enclosures used in areas with low temperatures, for instance, are required to be made of a material that can withstand freezing temperature, as opposed to the ones used in arid areas, which require material that can withstand high temperatures. In salty areas and chemical facilities, the non-corrosive material is needed.

The load capacity of each enclosure varies depending on the place it is located and the environment of the area. Free-standing enclosures hold more capacity than wall-mounted enclosures. The enclosures mounted on the walls need to be lighter and firmly attached.

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