Types of Electrical Wiring in Commercial Buildings and Properties

There are completely different types of electrical wiring in commercial buildings compared to residential! Click to learn about the different types of wiring.

Did you know that there are three main types of methods that are used for commercial buildings? No, not all commercial electrical systems are the same. There are many variables depending on usage and efficiency, driving the types of electrical wiring used.

The type of electrical wiring, it being a grounded system, and overall complexity will be based on which country your commercial building is within. Different countries have different regulations pertaining to commercial buildings and properties which is something important to consider.

Generally speaking, we're going to be covering the standard methods that are used in commercial wiring and we will be breaking down some of the most common types of electrical wiring for commercial properties and their differences.

This guide will help you decide the right path and your next steps when it comes to deciding what wiring to use for installation within your commercial building projects.

Different Types of Electrical Wiring for Commercial Buildings

Oftentimes, the standard assembly for conductors used in electrical wiring in commercial buildings is XHHW-2 or even THHN. Metal-clad cables or type MC is one of the options that is used most of the time throughout commercial construction projects.

Let's list and talk about the different types of electrical wiring for commercial buildings in comparison to residential properties.

Type MC

This is often one of the most common types that you will see running throughout a commercial building. The thing with this type of cable though, is how it's also used in residential settings. It has an aluminum interlocking armor that covers and protects the inner wires.

The types of applications this shows up could vary from schools, apartments, and office buildings, to other areas considering its versatility.

Type AC

Similar to Type MC, this also has an aluminum interlocking armor but with a steel messenger wire running through it as well. You'll often see this type being used underground or even exposed to the elements on bridges or other types of structures.

Type MI

This is another type of wiring that you might come across while working on a commercial building project. It is constantly being improved and updated but is mostly used in industrial applications where there is a lot of movement.

It is also used in computer rooms or areas where sensitive equipment is being used because it can reduce electromagnetic fields. MI stands for material-insulated and this is a metal-sheathed type of cable as well. It's more used for emergency types of systems and other specialized projects.

Type UF

Another common type, you'll find this form in is both inside and outside of commercial buildings. It has a THWN wire running through the center with a PVC jacket surrounding it.

Because of its flexibility, it can be run through walls easily without taking up too much space. You will often come across this in theaters or even commercial garages or other settings.

What Types Are Used in Commercial Properties the Most Often?

So, what is the main type of wiring that's used in commercial properties? The answer is different from the popular types we previously mentioned. Oftentimes, type EMT or electrical metallic tubing's used most of the time for commercial construction projects.

This type is also known as "thin-wall". most of the time this is used in comparison to other options because it's lightweight. It's also more cost-efficient than alternatives.

When it comes to types of electrical wiring for commercial buildings, there are a few that stand out more than others. Overall, while type MC and AC might get used in some projects, EMT is the most popular because it's easier to work with and easier to afford for larger-scale projects.

The Classes to Consider

While residential wiring is specific to homes and properties used as residences, there are also more complicated wiring options for larger projects. In particular, commercial wiring focuses on complex systems and high voltage outputs.

Some of these types of properties could be shopping malls, hospitals, or even power plants. There are three types to consider and they mainly focus on the supply of power:

• Type I Wiring
• Type II Wiring
• Type III Wiring

Each type or class has its benefits and drawbacks. Type I is the most common in North America, however, each type is often used all over the world for many different types of purposes. Let's start with a brief rundown of what each type is before we go any further into the differences.

Type I wiring is also known as conduit wiring. This involves running electrical cables through metal or PVC pipes that have been buried underground. The main benefit to this type of wiring is that it's very durable and can last a long time if installed correctly and maintained properly.

Type II wiring could also be thought of as trunking wiring. This involves running electrical cables along the surface of a building, often through metal or PVC trunking that's mounted on walls or ceilings.

With type III wiring, the functionality of this option is pretty similar to that of class two wiring but it has a higher voltage. It also has more power limitations.

Get Expert Help

Many different types of electrical wiring can be used in commercial buildings and properties. While each type has its benefits and downfalls, there is also a solution that will be better suited for one application than it would be for another.

Buell Electric Inc. is a hub of certified expert electricians that specialize in various electrical forms and projects. If you need guidance for your next commercial project, reach out to our team today.