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Rigid Fire-Resistant Cable
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- Product Description
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BTTZ Cable Domestically known as fire-resistant cables, the company has invested heavily in recent years to establish a specialized production line capable of manufacturing magnesium oxide cables (BTTZ) in continuous lengths—up to 1,000 meters per cable, compared to the traditional limit of just 50–100 meters per cable. This breakthrough effectively addresses the common drawbacks associated with shorter cable lengths and numerous joints, significantly reducing project investment costs for users, speeding up installation processes, and ensuring reliable, long-term performance of the products.
BTTZ Cable Description:
BTTZ is a heavy-duty, fire-resistant cable with a copper core and copper sheath, featuring magnesium oxide insulation (also known as heavy-duty mineral-insulated cable). It consists of a seamless copper tube outer sheath, with magnesium oxide crystal powder tightly packed in the middle as the insulating material, and a conductor made from a single solid copper rod.
Model Specifications Number of cores Rated Voltage BTTZ 1.0–400 mm² 1, 2, 3, 4, 7, 12, 19-core 750V BTTVZ 1.0–400 mm² 1, 2, 3, 4, 7, 12, 19-core 750V WD-BTTYZ 1.0–400 mm² 1, 2, 3, 4, 7, 12, 19-core 750V BTTQ 1.0–4 mm² 1, 2, 3, 4, 7-core 500V BTTVQ 1.0–4 mm² 1, 2, 3, 4, 7-core 500V WD-BTTYQ 1.0–4 mm² 1, 2, 3, 4, 7-core 500V B----Fixed-installation power cable for wiring T----Copper sheath T----Copper conductor Z----Heavy-duty, voltage-resistant grade 750V
1. The full name of the BTTZ cable is Heavy-Duty Copper-Core Copper-Sheathed Magnesium Oxide Mineral-Insulated Cable.
2. Mineral-insulated cables with a cross-sectional area of 25 square millimeters or more are all single-core.
3. Specifications: 1 × 6–1 × 400 mm² | 2 × 1.0–2 × 25 mm² | 3 × 1.0–3 × 25 mm² | 4 × 1.0–4 × 25 mm²
BTTZ cable characteristics:
It features high-temperature resistance, fireproofing, explosion-proof capabilities, and non-combustibility (capable of continuous long-term operation at 250°C, as well as short-term operation for up to 30 minutes even under extreme conditions of 1000°C), while also offering high current-carrying capacity, a small outer diameter, superior mechanical strength, and an extended service life—making it generally unnecessary to use separate grounding conductors.
Applications of BTTZ cables:
Widely used in hazardous, harsh, and high-temperature environments such as high-rise buildings, nuclear power plants, metallurgy facilities, chemical plants, mines, and kilns. In recent years, it has also been increasingly applied in high-rise buildings, airports, ports, and subway systems—to ensure the continuous operation of critical fire protection equipment and systems during emergencies, including fire pumps, fire elevators, local lighting, emergency evacuation signage, security surveillance, smoke control and exhaust systems, and backup power supplies.
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Founded in 2000, Guanghui Cable is a comprehensive wire and cable enterprise integrating professional R&D, manufacturing, sales, and service.
Contact us
TEL: +86-319-5986999
TEL: +86-319-5983448
Phone: +86-15833709658
No. 8 Simahuilong Street, Ningjin, Hebei
