What do the ratings OF, OFNR, and OFNP represent?
The ratings OF, OFNR, and OFNP represent different levels of flame retardancy for optical fiber cables, particularly important for installation in various building environments.
- OF (Optical Fiber): This is a general designation indicating an optical fiber cable. It is often used as a prefix to more specific flame-retardant ratings.
- OFNR (Optical Fiber Nonconductive Riser): Cables with this rating are designed for use in riser applications, meaning vertical runs between floors in a building. They are engineered to prevent the spread of fire from one floor to another and do not contain electrically conductive components.
- OFNP (Optical Fiber Nonconductive Plenum): This is the highest flame retardancy rating for optical fiber cables. Cables with an OFNP rating are suitable for use in plenum spaces, which are enclosed areas used for air circulation (e.g., above suspended ceilings or below raised floors). These cables are designed to resist fire spread and produce minimal smoke and harmful fumes in the event of a fire, and they also do not contain electrically conductive components.
The specific flame retardancy rating of a patch cord depends on the materials used in its jacket. OFSCN offers various patch cords designed for different environmental conditions. An example of our patch cord products is shown below:
You can find more details on our range of patch cords through the following links:
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