OFC cables are conductive (C) fiber cables, i.e., cables containing metals in strengthening structures (which are not used for electrical connections). In contrast, OFN cables are non-conductive and therefore fully insulating.
Riser cables, marked with an additional “R” (e.g., OFCR or OFNR), are used for connections between different levels of a building (vertical shafts). They are optimized such that they do not support the spread of fire between different floors.
Plenum cables, marked with an additional “P” (e.g., OFCP or OFNP), are used in plenum or air-handling spaces – for example, for cables running along ceilings or ventilation ducks. When exposed to fire, they should not produce too much smoke and should be flame-retardant.
General purpose cables are marked with a “G”, e.g. OFCG or OFNG.
certified fiber optic technician jobs
The above mentioned codes do not specify optical properties of the contained fibers; these can be single-mode or multimode fibers, for example, of any type.
Other Elements of Fiber Cable Specifications
Various elements are often encountered n the nomenclature and specifications of fiber cables:
No comments:
Post a Comment