Used extensively in utility, industrial, and energy infrastructure, this cable design combines EPR insulation, a copper tape shield, and a PVC outer jacket to handle high electrical stress, moisture exposure, and mechanical demands.
This article explains how 35 kV MV-105 cable is constructed, where it’s used, and how to select the right conductor size for your application.
Medium voltage power systems require cables that deliver long-term electrical reliability while withstanding harsh installation and operating conditions. One of the most commonly specified solutions for these environments is the 35 kV Shielded EPR/PVC Single Conductor Cable, Type MV-105.
What Is 35 kV MV-105 Cable?
A 35 kV MV-105 cable is a medium voltage, single-conductor power cable rated for 35 kV at 133% insulation level and a maximum conductor temperature of 105°C. The MV-105 designation indicates compliance with UL requirements for medium voltage power cables used in demanding electrical systems.
These cables are typically installed in:
- Open air
- Conduit and duct systems
- Direct burial (with proper installation methods)
- Wet and dry locations
They are commonly specified for utility substations, generating stations, refineries, chemical plants, steel mills, and heavy industrial facilities.
Key Construction Features
The performance of 35 kV MV-105 cable comes from its layered construction, designed to control electrical stress and protect the conductor over decades of service.
Typical Construction Includes:
- Conductor: Class B stranded, annealed bare copper
- Conductor Shield: Extruded semiconducting compound
- Insulation: Ethylene Propylene Rubber (EPR), 133% insulation level
- Insulation Shield: Extruded semiconducting layer
- Metallic Shield: Helically applied copper tape
- Overall Jacket: Sunlight-resistant black PVC
This design ensures consistent electrical stress distribution, excellent moisture resistance, and strong mechanical protection.
Why EPR Insulation Is Preferred at 35 kV
EPR insulation is widely used in medium voltage systems because it offers:
- High dielectric strength
- Excellent thermal stability
- Superior resistance to moisture and electrical treeing
- Long service life in high-stress environments
At 35 kV, EPR insulation provides a reliable balance of electrical performance and flexibility, especially compared to older insulation technologies.
Choosing the Right Conductor Size
Selecting the correct conductor size depends on ampacity requirements, voltage drop, installation method, and overall system design. Below are commonly specified conductor sizes for 35 kV shielded MV-105 cable, with direct references to the corresponding products.
Common 35 kV MV-105 Conductor Options
| Conductor Size | Typical Use Cases |
|---|---|
| 1/0 AWG | Medium load feeders, industrial distribution |
| 2/0 AWG | Higher-capacity industrial and utility feeders |
| 4/0 AWG | Substation feeders and heavy industrial loads |
| 350 kcmil | High-ampacity power distribution |
| 500 kcmil | Utility and generation infrastructure |
| 750 kcmil | Maximum ampacity for large-scale power systems |
Larger conductor sizes are typically selected for long runs, high current loads, or critical infrastructure where voltage drop and thermal performance must be carefully managed.
Typical Applications for 35 kV Shielded MV-105 Cable
- Utility substations and switchyards
- Power generation facilities
- Industrial power distribution systems
- Petrochemical and refining operations
- Steel mills and mining facilities
- Renewable and large-scale energy infrastructure
Their ability to perform reliably in wet, dry, and outdoor environments makes them a standard choice for permanent medium voltage installations.
Need Help Selecting the Right 35 kV Cable?
Choosing the correct medium voltage cable involves more than just voltage rating. Factors such as ampacity, installation method, environment, conductor size, and availability all play a role in selecting the right solution.
If you need assistance selecting the correct 35 kV MV-105 cable, verifying specifications, or requesting pricing, contact us for expert support or a custom quote. Our team can help ensure you’re sourcing the right cable for your application and timeline.
Disclaimer
Product descriptions, specifications, and application information are provided for general reference only and may vary by manufacturer. Dimensions, weights, ampacity values, and compliance markings are nominal and subject to change without notice. Always consult applicable electrical codes, project specifications, and manufacturer documentation before installation.