This article contains my technical opinions and is for general information purposes only. Product references are generic as different brands and products may have different features.
What is MV-105 Cable?
MV-105 cable is the standard medium voltage power cable used across the United States for industrial, utility, and large commercial power distribution systems. Built to UL 1072 standards, MV-105 is designed to deliver long-term electrical reliability and thermal stability in demanding environments.
While Canadian industrial projects primarily rely on MV TECK armoured cable, MV-105 dominates the U.S. market, where unarmoured cable in conduit is preferred. This difference stems from distinct regional installation practices and code requirements.
In the past decade, MV-105 has gained dual UL and CSA listings, allowing it to be used across North American projects. In Canada, MV-105 is typically selected for short runs, or when or MV TECK cable is unavailable due to lead-time or minimum-order constraints.
Construction and Design Features
MV-105 cables are designed for medium-voltage applications from 5kV to 35kV, with “105” indicating a maximum conductor operating temperature of 105°C in dry and wet locations.
Typical construction includes compact stranded copper or aluminum conductors surrounded by an extruded semi-conducting shield for stress control. Insulation is usually EPR rated for -40°C to 105°C, with TRXLPE (Tree-Retardant XLPE) as a custom-made option. A second semi-conducting shield provides even charge distribution, while a helically applied 5 mil copper tape with 25% overlap serves as the metallic shield. There are other shielding options, please reach out for more information regarding these.
The assembly is finished with a durable, flame-retardant PVC outer jacket, resistant to moisture and sunlight. This construction provides long-term thermal stability, environmental protection, and flexibility during installation.
Applications
MV-105 has become the “workhorse” of medium-voltage power cables, offering reliable performance and versatility across a broad range of installation environments. Below is an overview of common applications for MV-105 based on the conditions for use found in CEC Table 19.
MV-105 as an Alternative to MV TECK Cable
Both cables serve industrial and utility applications, MV-105 and MV TECK are built for similar applications with the difference of armouring:
In essence, MV TECK provides a rugged all-in-one armoured solution favoured in Canada’s harsh environments, while MV-105 offers a lightweight, flexible conduit-based alternative.
MV-105 Applications in Wet or Dry Locations, Includes:
- Conduit and raceways
- Cable trays
- Direct burial
- Indoor and outdoor environments
- Medium-voltage feeders and distribution circuits
- Utility substations and switchgear connections
- Power generation facilities
- Industrial and manufacturing plants
- Renewable energy systems (solar, wind)
- Underground distribution systems
Standards and Approvals
MV-105 cables are manufactured and tested to meet the following:
- UL 1072 – Medium Voltage Power Cable
- CSA C68.10 Shielded Power Cables for Commercial and Industrial Applications - 5 to 46kV
Thanks to dual UL and CSA approvals, MV-105 is recognized under both the NEC (NFPA 70) and the Canadian Electrical Code, ensuring compliance for cross-border installations.
Summary
MV-105 cable delivers proven electrical performance, heat resistance, and mechanical strength for medium-voltage power distribution up to 35kV. With its dual UL/CSA approval, it provides a convenient and compliant solution for projects across North America.
In Canada, MV-105 is most often used for short runs or when MV TECK cables are unavailable, serving as a practical alternative where flexibility, stock availability, or project timing are key considerations.
About the Author
Julian Godoy, Application Sales Engineer B.Sc. Eng., has 10 years of technical construction experience gained through major industrial, infrastructure, and commercial projects across North America. Julian is passionate about sharing his knowledge on better and safer cable installations.
He can be reached by phone at 604-977-9880 or via email at Julian.Godoy@texcan.com.
