“A premier thermal solution for extreme environments, engineered with mica-glass composite insulation for maximum reliability in temperatures up to 450C.”

Why Professionals Choose MG High-Temp Wire

The 4/0MG (Mica-Glass) wire is engineered for the most extreme thermal environments on earth, where even PTFE-based wires (like TGGT) reach their limits. MG wire is the gold standard for internal wiring in industrial kilns, glass plants, cement manufacturing, and heavy-duty smelting equipment. By using a Mica-Glass composite insulation and a 27 % Nickel-Coated Copper conductor, it offers structural integrity and electrical safety at temperatures up to 450C.

• 450C Thermal Performance: Rated for continuous operation in environments reaching 842F, providing unmatched safety for extreme-heat industrial zones.

• Mica-Glass Insulation: The mica tapes provide superior dielectric strength and thermal resistance compared to standard plastic or silicone insulators.

• Nickel-Coated Copper Conductor: Features high-quality nickel plating to prevent conductor oxidation and embrittlement, ensuring a long service life under constant extreme thermal stress.

• Fiberglass Braid Protection: The outer jacket is treated with a high-temperature saturant, providing rugged resistance against abrasion and flame.

MG Technical Specifications

ENGINEERING OVERVIEW: 4/0 MG 600V

• APPLICATION: Industrial kilns, furnaces, glass plants, cement manufacturing, and extreme-heat processing equipment.

• VOLTAGE: 600 Volts.

• UL LISTING: UL 5107 / UL 5359.

• CONDUCTORS: Flexible (259 strands) stranded soft drawn 27% nickel coated copper conductors per ASTM B355, B8, B173 and B174

• INSULATION: Two layers of fiberglass-reinforced mica tape.

• JACKET: Braided fiberglass treated with high-temperature saturant.

• TEMPERATURE: 450C (842F).

• NOMINAL OD: 0.704 inches (17.88 mm).

• TECHNICAL NOTE ON AMPACITY: Due to the extreme operating temperatures of MG wire (450C), ampacity is highly dependent on ambient temperature and installation method. Please refer to your local electrical code (NEC) or consult with your electrical engineer to ensure compliance with specific derating requirements.

Common 4/0 MG Applications

• Industrial Kiln Wiring: Main power feeds for large-scale extreme-heat ceramic and glass kilns.

• Smelting & Foundry: Primary circuits for high-heat furnace systems and induction heating.

• Cement Manufacturing: Heavy-duty power supply for rotary kilns and critical heat-intensive processing.

• Heat-Treating Furnaces: High-amperage feeds for large-scale atmosphere furnaces.

• Industrial Busbar Connections: Reliable heavy-gauge links for high-heat equipment.

Technical Note:All values are nominal and subject to industry tolerances and manufacturer corrections. Specifications are subject to change without notice. It is the buyers responsibility to verify that all materials meet the specific requirements of the project and comply with local electrical codes.