UNDERGROUND OPTICAL CABLE NOMENCLATURES

Underground cables are installed in ducts or directly buried. Underground cables in ducts are usually installed in 4-inch (approximately 10 cm) ducts. The underground cable directly buried is placed underground without conduit, and therefore it must be designed to withstand the rigors of the environment, such as to support the actions of fungi. The leftovers of these cables are made in the passage boxes, widely used in underground networks.

OPTICAL CABLE NOMENCLATURES FOR OVERHEAD EXTERNAL NETWORK

For the use of cables in an aerial overhead network, it is necessary to define whether the cable will be supported via a spinning cable or if it will be self-supporting. It is also important to know whether the cable will be installed in a span of up to 120 meters or longer. Below is the pattern of the names used in external network cables:

The cables of internal and external networks, also known as indoor and outdoor, have different characteristics and applications. Internal cords and cables are generally used indoors and have no protection against the weather. CFOT cables can be used indoors and outdoors, as they have an external cover with weather protection. The recommendation when using these cables externally is that they be installed spine.

Defining the flame retardancy class of cables is also important when designing a network. The cables have 4 basic designations for defining the delay, which are:

foa certification

GENERAL OPTICAL CABLE (COG):

Indicated for vertical application in pipes with a lot of occupation, in places without forced airflow, in installations in the same environment or in places with fire propagation conditions similar to these.

OPTICAL “RISER” CABLE (COR):

Indicated for vertical application in a lifting pit (“Shaft”), in installations where the cables exceed more than one floor, in places without forced air flow, in pipes with little occupation or in places with fire propagation conditions similar to these.

OPTICAL “PLENUM” CABLE (COP):

Indicated for horizontal application, in confined places (between floors, ceilings, gutters, etc.) with or without forced air flow or in places with fire propagation conditions similar to these.

Low smoke and halogen-free cable - “Low Smoke and Zero Halogen” (LSZH):

Indicated for applications in paths and horizontal and vertical spaces where there is no forced air flow, or in places with fire propagation conditions similar to these.

Below are some nomenclatures recorded on internal and external cables: