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Loose tube cables are generally recommended for outdoor applications or for premise uses where there may be significant shifts in ambient temperature. The cable construction comprises a dielectric central strength member around which colour coded buffer tubes, each 2.8mm diameter are cabled. Each buffer tube can contain up to 12 colour coded optical fibres, thus providing circuit identification. The construction allows the tube material to expand and contract due to temperature changes without damaging the fibre. The tubes are filled with a gel material which provides moisture protection. Loose tube cables can be used in underground ducts and aerial lashings and are of an all-dielectric construction. Up to 12 optical fibres can be assembled in each tube and a total of 264 fibres in a cable. Series 740L cables can be supplied in composite form having
a mixture of fibre types, such as singlemode and multimode. In
this case, fibres of a common type, or size, are grouped together
in one or more common tubes.
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| Custom build cables are available for heavy or industrial applications to provide extra strength and durability; dual Jacket designs, corrugated steel or interlock steel armour. Contact Tech Optics for more information. |
