MV 90 VS MV 105: Type and Insulation Effects

“Are you choosing a complex medium voltage (MV) cable for your next large project”? Deciding on whether to use mv 90 vs mv 105 cables can significantly impact your budget, safety, and operational efficiency. In our business blog, we will provide you with a clear understanding of the differences between the two cable options and help you choose the one that best suits your needs.

What are type of Type MV-105 and MV-90 Cable?

Now, we are going to talk about the basics of different MV cable types to get a preliminary understanding of what the cable number names themselves represent.

Type MV-90 cable: The “90” indicates that the cable is safe to operate below 90 degrees Celsius. It is a medium distance power cable used by power suppliers for environments with relatively moderate temperatures. MV-90 cable is suitable for most indoor and outdoor power distribution needs.

Type MV-105 cable: “105” means that it is designed to tolerate high temperatures up to 105 degrees Celsius. MV-105 cable is designed for medium distance power transmission in hotter environments. Such as near industrial equipment or in areas with high ambient temperatures.

What is MV-90 cable?



The MV-90 cable class of medium voltage power lines efficiently transmits power between 2.4 and 35 kV. Along with durability and moisture resistance, it provides significant electrical performance.

MV 90 cable is primarily used in a variety of applications such as power circuits, substation feeders and industrial plant installations.

The cables are constructed for easy installation in conduit, pipe or direct burial methods. Therefore it is considered a fundamental component of the medium voltage distribution system infrastructure.

What does MV-105 cable?


MV-105 cables are a class of medium voltage wires designed to facilitate network power distribution in the 2.4 kV to 35 kV range. It is notable for its enhanced heat resistance along with excellent electrical properties.

MV105 cable is ideally suited for demanding applications that require higher temperature tolerances, such as mv-105 15 kv cable can be used in utility substations and power stations etc.

With its rugged design and multiple installation options, MV-105 cable is an essential component for reliable, efficient power distribution in environments that challenge traditional temperature limitations.

Moreover, we break down the detailed comparison into three perspectives based on cable characteristics.  The contrasting details will help you determine which cable is best for your project and identify any potential challenges.

What is the difference between MV 90 and MV 105 cable?


For one, it is evident that medium voltage cable ratings about insulation temperature significantly impact its performance.

Temperature Rating

  • MV-90 Cable: MV90 cables operate reliably in wet and dry conditions at temperatures up to 90°C. They also maintain performance at standard ambient pressures. It also maintains performance at standard ambient pressures.
  • MV-105 Cable: MV105 cable has a capacity for high operating temperatures up to 105°. It functions effectively in situations requiring higher capacity or high operating temperatures.

Then, we will now start discussing the details of insulation and its effects.


  • MV-90 Cable: Either cross-linked polyethylene (XLPE) or ethylene propylene rubber (EPR) are typically used as MV-90 cable insulation materials. They significantly increase their lifespan and robustness in every circumstance.
  • MV-105 Cable: Similarly, the insulation used in MV-105 cable is usually made of EPR or XLPE. Nevertheless, the construction of the insulation is specifically engineered to resist greater temperatures. The processed insulation enhances the fitness of cable in more demanding thermal conditions.


More importantly, which of the two types is more capable of handling different environments in the application field?


  • MV-90 Cable: MV-90 cables are used in a wide range of applications. For example, MV-90 cables provide a stable power supply in commercial building environments.
  • MV-105 Cable: For more demanding applications, MV-105 cables are a better fit than MV-90. For example, MV-105 cables are more widely used in environments where high temperatures are generated, such as steel mills and direct sunlight.

What is the difference between 100% and 133% insulation levels?

The majority of people have a challenge when selecting between 100% and 133% insulation levels when picking medium voltage power cable for a project. But how do we choose? Consider it as choosing between different gauges of cable for a particular electrical application. Both options meet different operational needs and environments, but their application is quite varied depending on the function they can perform. So what exactly is the difference between the two levels of insulation and how does it affect them in practice?

100% insulation

  1. 100% insulation level cables are especially intended to withstand standard operating voltages.
  2. This type of cable is suitable for use in environments where power systems are relatively stable and voltage fluctuations are low. For example, in a well-controlled industrial facility or an indoor distribution system, it provides reliable power transmission and guarantees continuous operation of the system.
  3. The core advantage lies in the ability to operate stably for long periods at defined voltage levels without the need for additional insulation to resist occasional voltage spikes.

133% insulation

  1. In contrast, 133% insulation rated cables are designed to withstand voltage levels up to 33% above the nominal ground voltage.
  2. They are best suited for external environments where voltage surges or fluctuations may occur, such as power transformer connections or outdoor distribution lines.
  3. The reinforced insulation of these cables protects the cables from transient over voltages and guarantees the safety and reliability of the power system. Such as lightning strikes or voltage shocks from switching operations.
  4. It is based on the concept of coping with unpredictable power environments and ensures that performance remains unaffected even under extreme conditions.

Before selecting a cable with an insulation rating of 100% or 133%, we need to evaluate the risks and application scenarios. Whether we want the project to go off without a hitch or prefer to deal with unpredictable challenges, understanding the two insulation classes and their impact on cable performance is important. In addition, the higher level of insulation of concentric neutral cables provides additional safety and reliability. It’s also not a less favorable option.

Below is a list of some of the common medium voltage cable types we sell for your reference: 5KV Cable, 10kv Cable, 15kv Cable, 35kv Cable.

MV 90 VS MV 105 Conclusion

After a comprehensive“mv 90 vs mv 105” analysis, we have determined that MV-90 cables are the best option for standard power distribution in moderate temperature indoor and outdoor environments when compared to MV-105 cables. In contrast, MV-105 cables require higher temperature resistance and capacity to meet demanding applications.

In addition, we should note that the selection of these two types of cables should not only take into account the needs of the installed cable system but also the maintenance of cable performance under extreme temperature conditions.

Whether your project needs to withstand temperatures as high as 105°C or just a standard 90°C environment, ZW Cable can provide high quality cables that match your needs. Additionally, there are also high voltage wires that are usually rated between 35 kV and 230 kV. The voltage rating of low voltage cables is usually below 1 kV. We can choose according to the needs of electrical engineering. Count on ZW Cable for your next project and experience the difference in quality and performance!

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About Me
Richard Zi
Richard Zi

My name is Richard Zi, and serve as the General Manager of ZW Cable. With a deep and extensive background of more than 15 years in the cable industry, I am excited to share my wealth of knowledge and experience.ZW Cable is a renowned company in the field of cable manufacturing in world, we specialize in selecting the best cable sizes and effectively solving all your cable challenges. If you have any questions or needs regarding cable solutions, please contact me and I assure you of the highest standards of personalized and effective guidance and support.View All My Posts >>

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