How does the flame-retardant outer sheath contribute to circuit safety in demanding conditions?

The halogen-free, flame-retardant sheath compound used on the MLD TDT U DQH (ZN) BH is formulated to limit flame spread, smoke generation, and toxic gas emission, preserving circuit integrity during a fire event. In combination with the metallic loose tube and possible armoring layers, the cable can maintain optical signal transmission even when exposed to extreme heat, helping critical communication and safety systems remain operational. This fire-resistant design is verified against IEC 60332 flame tests and complements the overall heavy-duty construction that also provides long-term corrosion and weather resistance.