What is UL1072? The Standard for Medium-Voltage Power Cable
While standards like UL 83 and UL 44 handle everyday building power, UL 1072 is the heavy hitter for high-capacity systems. It is the definitive safety standard for Medium-Voltage (Type MV) Power Cables rated from 2,400V to 35,000V (35kV).
If your project involves primary power distribution, industrial substations, or utility-scale generating stations, you are likely working under the requirements of UL 1072.
The Construction Essentials
Cables listed under UL 1072 are engineered to manage intense electrical fields and harsh environmental stressors.
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Insulation (The Dielectric): Typically utilizes EPR (Ethylene Propylene Rubber) or XLPE (Cross-linked Polyethylene). For MV-105 cables, this insulation is rated for continuous operating temperatures of 105°C.
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Shielding: Most MV cables rated above 2400V require a metallic shield—such as 5-mil copper tape—to equalize electrical stress and provide a path for fault currents.
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The Jacket: Features a sunlight-resistant and flame-retardant PVC or CPE outer layer designed for long-term durability.
Example of an Aluminum MV-105 35kV Medium Voltage Cable (UL1072)
Why Engineers Specify 1072
A cable earns its UL 1072 listing only after passing rigorous testing for high-voltage environments.
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Versatile Installation: UL 1072 cables are recognized by the NEC for use in permanent installations, including direct burial, underground ducts, conduits, and cable trays.
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Fault Protection: Shielded UL 1072 cables are critical for ungrounded systems where faults must be de-energized safely.
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Extreme Performance: Beyond the 105°C normal operating limit, these cables are tested to survive 140°C emergency overloads and 250°C short-circuit conditions.
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Safety Compliance: Most UL 1072 cables are tested to meet IEEE 1202 or UL 1685 flame tests, ensuring fire safety in industrial vertical tray runs.
How Wire America Can Help
At Wire America, we offer a professional-grade selection of Aluminum & Copper 5kV-35kV MV-105 Power Cable that fully complies with UL 1072 standards.
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Project Ready: Our MV-105 stock features 133% EPR insulation and copper tape shielding, making it the ideal choice for utility and industrial primary feeders.
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Utility-Scale Variety: From 2 AWG , 1/0, 4/0, up to 1000 kcmil, we carry the sizes needed for high-ampacity distribution.
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Cut to Length: Medium-voltage projects often require precise, long runs. We offer our MV-105 by the foot, ensuring you get the exact measurement your site plan demands without the waste.
Ready to start your project?
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At Wire America, we believe in genuine conversation. You'll always talk with real people who understand that every project requires careful product selection. We're here to ensure you feel educated, confident, and great about your final purchase. Feel free to give us a call to discuss your project! You can reach us at: 833-268-8644
⚠️ Important Disclaimer: Safety and Compliance
Wire America provides this information as a guide only. Electrical installations must strictly adhere to the National Electrical Code (NEC) and all state, local, and jurisdictional requirements, which vary widely. Always consult a licensed electrician, electrical engineer, or the local inspecting authority before purchasing material or starting any electrical project. Wire America assumes no liability for the installation, use, or interpretation of these guides.