What is the material of the pigtail outer sheath
Fiber optic pigtail outer sheaths are typically made from PVC, LSZH, or OFNP materials, chosen based on environmental and safety requirements.
Common Outer Sheath Materials
PVC (Polyvinyl Chloride): The most common default material for pigtail outer sheaths, PVC provides good flexibility, mechanical protection, and cost-effectiveness. It is suitable for general indoor applications where flame resistance and low-smoke emission are not critical . LSZH (Low Smoke Zero Halogen): LSZH sheaths are designed to emit minimal smoke and no halogen gases when exposed to fire, making them ideal for indoor installations in confined spaces, such as data centers or office buildings, where safety and reduced toxic fumes are important . OFNP (Optical Fiber Non-conductive Plenum): OFNP is a plenum-rated material that meets strict fire safety standards for air-handling spaces. It is non-conductive and highly flame-retardant, suitable for installations in ceilings, ducts, or other plenum areas where fire codes require plenum-rated cabling .
Selection Considerations
- Environmental Conditions: PVC is suitable for standard indoor use, LSZH for low-smoke and halogen-free requirements, and OFNP for plenum spaces.
- Fire Safety Compliance: LSZH and OFNP are preferred in areas with strict fire codes.
- Mechanical Protection: All materials provide a protective layer for the tight-buffered fiber, preventing damage during handling and splicing . In summary, the outer sheath of a fiber optic pigtail serves as a protective layer and is commonly made from PVC, LSZH, or OFNP, with the choice depending on installation environment, fire safety requirements, and mechanical protection needs .
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