The two most widespread outdoor fiber optic cable installations are pole line aerial set up and underground cable installation. Underground cable set up can be buried straight underground or placed into a buried duct.
Immediate burial installation:
Direct burial installations are most common for lengthy cross-country installations. The cables are plowed in or buried in a trench the set up method can be really fast. The most widespread cables utilized for direct burial are steel armored outside fiber cables.
Underground duct installation:
Fiber optic cables can also be pulled by means of underground ducts, which defend the cables from harsh surroundings. Underground duct installation also gives possibility for foreseeable future expansion without having the need to dig. This is the most frequent practice in city regions. Yet another benefit is that fiber cables without armor can be utilized which helps make the set up even less difficult.
Preparation ahead of underground cable set up:
1. Get appropriate proper-of-way permits
two. Recognize current underground utilities this sort of as buried cables, pipes
three. Examine the soil problem in purchase to establish the installation depth, no matter whether duct ought to be utilized, the variety of fiber cable need to be utilised and plowing equipment essential
Cable Burial strategies:
1. Plowed below
Plowing in Power adapter12v is more rapidly than trenched. But this method has to be meticulously monitored to avoid from harmful the cable.
2. Trenched
The fiber cable can also be trenched. This process is slower than plowing in however, it allows a a lot far more managed cable installation. Trenches can be dug by hand or by equipment.
three. Directional boring
Directional dull technique is used in which the surface area can’t be worked on this kind of as higher, railway crossings, and so forth. Instead, a unexciting equipment is used to bore a a number of inches diameter gap underneath the surface area, a duct is pulling through the hole and then fiber cables pulled into the duct.
Crucial aspects:
1. Cable set up depth: up to 40 inches
The depth that fiber cables should be buried is identified by the soil circumstances and surface utilization. In colder areas, fiber cables are normally buried underneath the frost line to avert the cables from becoming damaged by ground frost heaves.
2. Maintain the trenches as straight as achievable
Fiber cable trenches ought to be straight, and the trench base should be flat and degree. Backfill can also be used to distribute the cable load evenly and defend the cables.
3. Fiber cable warning labels must be buried immediately earlier mentioned the cable
Fiber optic warning cables are normally buried right over the cables to warn potential digging functions. Or concrete slabs can be buried under the warning label but previously mentioned the cables to supply even more security.
4. Whenever conducting armored fiber cables are utilised, they must be correctly grounded
In immediate burial installations, steel armored fiber cables are frequently selected for their power and security from rodent bites. A extremely critical thing to maintain in brain is to correctly ground the cables. They should be grounded at all termination points, splices and building entrances. The cable metal armor need to be linked to a floor wire making use of a compression-type clamp. The cable ground wire is then bolted to a close by ground terminal strip.
5. Fiber optic cable minimum bending radius ought to usually be observed throughout set up.