OFNR(Optical fiber, Nonconductive, Riser)is a type of optical fiber cable. As designated by the National Fire Protection Association (NFPA), this cable contains no electrically conductive components, certified for use in riser applications. The riser rated cable is engineered to prevent the spread of fire from floor to floor in a building.
OFNP(Optical Fiber Nonconductive Plenum) cables have fire-resistance and low smoke production characteristics. They can be installed in ducts, plenums and other spaces used for building airflow. This is the highest fire rating fiber cable and no other cable types can be used as substitutes, but OFNP plenum cables can be used as substitutes for OFNR cables.
LSZH(Low Smoke Zero Halogen) describes a cable jacket material that is non-halogenated and flame retardant. LSZH cable jacketing is composed of thermoplastic or thermoset compounds that emit limited smoke and no halogen when exposed to high sources of heat, e.g. flame. Low smoke zero halogen cable reduces the amount of toxic and corrosive gas emitted during combustion. This type of material is typically used in poorly ventilated areas such as aircraft or rail cars. Low smoke zero halogen is becoming very popular and, in some cases, a requirement where the protection of people and equipment from toxic and corrosive gas is critical.