Huijue Optical Cable Flame Retardant Rating Standard

Huijue optical cables adhere to international flame retardant and fire-resistant standards, including IEC 60332, IEC 60331, BS 6387, and UL/NFPA codes, with LSZH or OFNR jacket materials depending on application. Key Flame Retardant StandardsIEC 60332: This standard specifies tests for single and multiple cable flame propagation. Huijue optical cables meet IEC 60332-1-2 for single-cable flammability and IEC 60332-3-24 for multiple-cable flammability, ensuring that the cables resist ignition and limit flame spread in installations.

IE

C 60331: Defines circuit integrity under fire conditions, testing cables for their ability to maintain signal transmission during high-temperature exposure. Huijue cables demonstrate minimal optical attenuation under fire, e.g., 0. 16 dB change after 90 minutes at 750°C, and comply with BS 6387 “CWZ” category for fire, water, and mechanical shock resistance.

B

S 6387: Categorizes fire-resistant cables into CWZ, C, W, and Z tests. Huijue cables maintain optical performance under fire alone, fire with water, and fire with mechanical shock, making them suitable for tunnels, subways, and other critical infrastructure. UL/NFPA and NEC Compliance: For North American applications, flame retardant optical cables are tested according to UL-1666 (OFNR) and NFPA 70 (NEC) standards.

These ratings ensure cables prevent flame propagation in vertical riser shafts and indoor installations. Material ConsiderationsLSZH (Low Smoke Zero Halogen): Huijue cables often use LSZH jackets, which produce minimal smoke and no halogen gases during combustion, reducing toxicity and corrosion risks in confined spaces like tunnels or data centers.

OFN

R (Optical Fiber Non-Conductive Riser): For vertical installations, OFNR-rated cables prevent flame spread between floors and comply with UL-1666, making them suitable for riser shafts in multi-story buildings.

PVC and Other Flame-

Retardant Compounds: Some Huijue cables may use PVC with flame retardant additives to meet vertical-burn or riser ratings, though LSZH is preferred in public or poorly ventilated spaces due to lower smoke and toxicity.

Testing and Certification

Huijue optical cables are typically tested by Nationally Recognized Testing Laboratories (NRTL) or equivalent independent labs to verify compliance with IEC, BS, UL, and NFPA standards. Tests include: Flame propagation (single and multiple cables)Smoke density and toxicityCircuit integrity under fireMechanical and water resistance under fire conditions These certifications ensure that Huijue cables are safe for use in critical infrastructure, including subways, tunnels, and high-density indoor environments.

Summary

Huijue optical cables are designed to meet high flame retardant and fire-resistant standards, including IEC 60332, IEC 60331, BS 6387, and UL/NFPA codes. Depending on the installation environment, cables may feature LSZH or OFNR jackets to minimize flame spread, smoke, and toxic gas emissions. Independent testing ensures that these cables maintain optical performance under fire, water, and mechanical stress, making them suitable for subway stations, tunnels, riser shafts, and other critical applications.