Distribution Cables are made of several 900 µm tight-buffered structures for easy connectorization. This cable structure provides a global protection for all the fibres. Such cables are mostly used in vertical cabling or in locations where the cable is not frequently handled (i.e. outlets) - compared with cords.
For Indoor installation, these cables are manufactured with materials that limit fire hazards. The sheath is described as LSZH-FR, which stands for:
- LS (Low Smoke): Reduced emission of smoke when the cable is burning.
- ZH (Zero Halogen): The material is halogen free and does not emit toxic or corrosive smokes when burning.
- FR (Flame Retardant): Material does not propagate flame and is self-extinguishing when exposed to the flame.
For outdoor installation, the cables are designed with resistant outer sheaths, generally made of polyethylene to resist to more severe environment constraints (abrasion, temperature variation, crush resistance …). It features a watertight conception, obtained by using jelly and/or swellable elements, to stop the water propagation within the cable in case of cable accident.
Outdoor cables are mainly installed in ducts or directly buried.
In some case, Indoor-Outdoor structures are required. They combine the water tightness characteristics and LSZH-FR sheath.
Nexans offers also a extensive range of cables with other properties such as flame or fire non propagation or fire resistance, tunnel installation, rodent protection…