The BTTQ copper-core, copper-sheathed, magnesium-oxide-insulated, heavy-duty fire-resistant cable (also known as heavy-duty mineral-insulated cable) features a seamless copper tube outer sheath, a core filled with magnesium oxide crystal powder as insulation, and a single-strand copper rod conductor.
This cable features a seamless copper tube outer sheath, a core filled with magnesium oxide crystal powder as insulation, and a single-strand copper rod conductor. Due to its inherent fire and overload protection, high operating temperature, corrosion and explosion resistance, long service life, and flexible installation, it has been widely used in high-rise buildings, airports, docks, subways, and other locations to ensure uninterrupted operation of firefighting power and critical equipment such as fire pumps, fire elevators, local lighting, emergency evacuation signs, security surveillance, fire and smoke exhaust systems, and self-contained power supplies in the event of a fire.
This cable can operate continuously for long periods of time at 250°C and even for 30 hours at extreme temperatures of 1000°C. It also features a high current carrying capacity, a small outer diameter, high mechanical strength, and a long service life. It generally does not require a separate grounding conductor.
