Do you know the difference between OFNR and OFNP

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The
cable jacket comprised with different materials based on different
applications, In the United States, plastics used in the construction of plenum
cable are regulated under the National Fire Protection Association standard
NFPA 90A: Standard for the Installation of Air Conditioning and Ventilating
Systems. All materials intended for use on wire and cables to be placed in
plenum spaces are designed to meet rigorous fire safety test standards in
accordance with NFPA 262 and outlined in NFPA 90A.

 

The
following is the list of cable jacket rating:

 

OFNP
(Optical Fiber, Nonconductive, Plenum)

OFNR
(Optical Fiber, Nonconductive, Riser)

OFNP
(optical fiber, nonconductive, plenum) are used in plenum applications. They
are used inside buildings in plenum areas, the areas between a ceiling and the
floor above it, where space is reserved for the circulation of air. They have
the highest rated fire retardant where it emits little smoke during combustion.
The nonconductive element within
OFNP means they contain no electrically conductive components.

 

OFNR
(optical fiber, nonconductive, riser) are used in riser applications. These are
spaces inside a building in pathways that pass between floors, such as a
vertical zone or space. They are engineered to prevent fire from spreading from
floors to floors within buildings.

 

Here’s
a quick summary of the listing requirements for optical fiber cables and
raceways,

 

Types
OFNP and OFCP (Plenum): Suitable for use in ducts, plenums and other space used
for environmental air.

 

Types
OFNR and OFCR (Riser): Suitable for use in a vertical run in a shaft or from
floor to floor.

 

Types
OFNG and OFCG (General-Purpose): Suitable for general-purpose use, with the
exception of risers and plenums.

 

Types
OFN and OFC (General-Purpose): Suitable for general-purpose use, with the
exception of risers, plenums and other space used for environmental air.

 

Plenum
Optical Fiber Raceway: Have adequate fire-resistant and low smoke-producing
characteristics.

 

Riser
Optical Fiber Raceway: Have fire-resistant characteristics capable of
preventing the carrying of fire from floor to floor.

 

General-Purpose
Optical Fiber Cable Raceway: Resistant to the spread of fire.