Thhn Wire Sizes In Mm2 To Awg

By | October 11, 2017



Understanding Thhn Wire Sizes: Conversion from mm2 to AWG



When it comes to dealing with wires and cables, size is an important factor. Whether you’re doing electrical installations or repairs, you need to be aware of the diameter of the electrical wire you use. Knowing the different sizes of THHN wire can be beneficial in choosing the right product for your project.

The most common size designation used for THHN wires are American Wire Gauge (AWG) and square millimeters (mm2). In this article, we explain the conversion process from mm2 to AWG as well as tips on how to measure the sizes accurately. Read on to get started!

What is THHN Wire?



THHN wire is a type of electrical wire that is used in building wiring and other electrical projects. It is a combination of a heat-resistant thermoplastic, such as polyvinyl chloride (PVC), and a nylon coating. This makes it an ideal choice for use in high temperatures, as it is both durable and flame resistant. It is also commonly used in commercial and home wiring projects.

Converting from mm2 to AWG



It is important to understand the difference between mm2 and AWG measurements when working with THHN wire. AWG stands for American Wire Gauge and is the most common sizing system for electrical wire in the United States. The AWG measurement is based on the area of the conductor, rather than the diameter, which is why the range of sizes available is so wide.

On the other hand, the square millimeters (mm2) system is widely used around the world. It is based on the cross-sectional area of the conductor and is measured in square millimeters. To convert from mm2 to AWG, use the table below:










































mm2 AWG
1.25 16
2.5 14
4 12
6 10
10 8
16 6
25 4
35 2
50 1


As you can see, the higher the mm2 number, the lower the AWG number. This means that a 4 mm2 conductor will have an AWG size of 12 and a 50 mm2 conductor will have an AWG size of 1.

Measuring THHN Wires Accurately



When working with electrical wires, it is important to ensure you measure the diameter accurately to ensure proper installation. To do this, you can use a wire gauge or caliper tool. A wire gauge is a device that is designed to measure the diameter of a wire. Calipers are also a useful tool that can be used to measure the outside diameter of a wire accurately.

When measuring, always make sure to measure the outside diameter of the wire. This is because the measurement depends on the insulation thickness, which is sometimes not consistent. Once you have the measurement, simply refer to the table above to convert from mm2 to AWG.

Conclusion



THHN wires come in various sizes and knowing how to accurately measure and convert from mm2 to AWG is important when dealing with them. With the tips outlined in this article, hopefully you now have a better understanding of the conversion process.

It is important to remember that safety is paramount when working with wires and cables, so always follow the manufacturer's instructions and keep up with the recommended safety precautions.


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