OFNP vs. OFNR

Fiber optic cables are a vital component of modern communication networks. They are used to transmit data over long distances with minimal signal loss and interference. Two common types of fiber optic cables are OFNP (plenum) and OFNR (riser). Understanding the differences between these two types of fiber optic cables is crucial in making the right choice for your communication network.

OFNP (Optical Fiber Non-conductive Plenum) cables are used in air-handling spaces and plenum areas in buildings. Plenum areas are those spaces that allow air circulation for heating, ventilation, and air conditioning (HVAC) systems. OFNP cables are made of fire-resistant materials and are required to meet strict fire safety codes. They emit low levels of smoke and toxic fumes, making them suitable for use in areas where smoke and toxic fumes could be dangerous in the event of a fire.

OFNR (Optical Fiber Non-conductive Riser) cables, on the other hand, are used in vertical risers or pathways in buildings. They do not emit low levels of smoke and toxic fumes and are not required to meet the strict fire safety codes of OFNP cables. OFNR cables are less expensive than OFNP cables and are typically used in non-critical areas where fire safety is not a major concern.

When it comes to transmission performance, they are identical. They both offer high bandwidth and low signal loss, making them ideal for transmitting large amounts of data over long distances. However, OFNP cables are typically more expensive than OFNR due to the compounds used in the manufacturing process for the outer jacket. 

In conclusion, the choice between OFNP and OFNR fiber optic cables depends on the specific requirements of your communication network. OFNP cables are ideal for use in air handling spaces and plenum areas where fire safety is a concern, while OFNR cables are suitable for use in non-critical areas where fire safety is not a major concern. OFNP cables can always be used in place of OFNR, but not vice versa. 

Different types of optical fiber cables exist for various fire ratings, which can make choosing the appropriate one a challenging task. To aid those who are planning or installing a fiber network, UL 1651 is a critical guideline for ensuring the correct selection of fiber. The National Electric Code (NEC) Article 770.19 outlines these guidelines, but some commonly used measures include:

• OFNP, OFCP, OFNR, OFCR,OFNG, OFCG, OFN, OFC for small, in-building deployments using a riser
• OFNP, OFCP for existing fabricated ducts within a building
• OFNP, OFCP for plenum spaces used for environmental air in public buildings
• OFNP, OFCP, OFNR, OFCR,OFNG, OFCG, OFN, OFC for fireproof shafts using a riser in any building type
• OFNP, OFCP, OFNR, OFCR,OFNG, OFCG, OFN, OFC when using a metal raceway for in-building deployments covering multiple floors and rooms/apartments
• OFNP, OFCP, OFNR, OFCR for vertical runs between floors within a riser
• OFNP, OFCP, OFNR, OFCR for riser cable routing assemblies inside a building
• OFNP, OFCP, OFNR, OFCR,OFNG, OFCG, OFN, OFC for in-building deployments with routing on only one floor.

Consult DMSI For Your Fiber Optic Needs

We focus on custom product manufacturing for fiber optic connectivity. We will engineer solutions to any customer’s specs and needs, and we create end-to-end solutions so you won’t be left in the dark. DMSI strives to provide our customers with the highest quality product above industry standards at a lower cost.

Do you need a custom fiber optic connectivity solution?

DMSI is ready to work with you to customize your fiber optic network!

We focus on custom product manufacturing for fiber optic connectivity. We will engineer solutions to any customer’s specs and needs, and we create end-to-end solutions so you won’t be left in the dark. DMSI strives to provide our customers with the highest quality product above industry standards at a competitive cost.

Do you need a custom fiber optic connectivity solution? DMSI specializes in custom design solutions. We work all over the world to provide solutions from our headquarters in Venice, Florida. Our goal is to provide you with the perfect solutions, designs, and cabling.

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