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Is CM optical cable fireproof
They represent the highest fire rating under the UL/NEC classification for fiber optic cables. They are specifically designed for installation in plenum spaces, such as air-handling ducts and return-air plenums, without requiring installation in metal conduit. The National Electric Code (NEC) classifies Ethernet cable jackets by fire-resistance performance, with CM, CMR, and CMP being the most common ratings. It offers low cost, good flexibility, excellent chemical resistance, and inherent self-extinguishing properties, making it suitable for general indoor applications. However, when exposed to fire, PVC produces dense smoke. Fireproof fiber optics are essential for protecting commercial buildings.
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