The two most typical outdoor fiber optic cable installations are pole line aerial set up and underground cable set up. Underground cable set up can be buried straight underground or put into a buried duct.
Immediate burial set up:
Immediate burial installations are most widespread for extended cross-place installations. The cables are plowed in or buried in a trench the set up procedure can be very rapid. The most widespread cables used for immediate burial are steel armored out of doors fiber cables.
Underground duct installation:
Fiber optic cables can also be pulled via underground ducts, which defend the cables from severe setting. Underground duct installation also provides possibility for potential growth with no the need to dig. This is the most common practice in city regions. Yet another reward is that fiber cables with no armor can be employed which can make the set up even less difficult.
Preparing prior to underground cable set up:
one. Get proper right-of-way permits
2. Discover current underground utilities this sort of as buried cables, pipes
3. Look into the soil situation in get to determine the set up depth, no matter whether duct must be used, the variety of fiber cable ought to be used and plowing equipment needed
Cable Burial techniques:
one. Plowed under
Plowing in a fiber cable is quicker than trenched. But this process has to be very carefully monitored to avoid from harming the cable.
The fiber cable can also be trenched. This approach is slower than plowing in nevertheless, it permits a a lot much more controlled cable installation. Trenches can be dug by hand or by equipment.
3. Directional boring
Directional dull approach is employed where the surface area are not able to be worked on these kinds of as large, railway crossings, and so on. As an alternative, a unexciting machine is utilised to bore a a number of inches diameter gap underneath the surface area, a duct is pulling via the gap and then fiber cables pulled into the duct.
1. Cable set up depth: up to forty inches
The depth that fiber cables should be buried is determined by the soil situations and surface area use. In colder regions, fiber cables are generally buried under the frost line to avoid the cables from getting damaged by ground frost heaves.
2. Keep the trenches as straight as attainable
Fiber cable trenches must be straight, and the trench bottom should be flat and amount. Backfill can also be utilised to distribute the cable load evenly and shield the cables.
three. Fiber cable warning labels should be buried directly previously mentioned the cable
Fiber optic warning cables are usually buried straight earlier mentioned the cables to warn future digging operations. Or concrete slabs can be buried below the warning label but earlier mentioned the cables to give even a lot more safety.
four. Whenever conducting armored fiber cables are employed, they ought to be properly grounded
In direct burial installations, steel armored fiber cables are frequently selected for their strength and security from rodent bites. A quite critical point to maintain in thoughts is to appropriately ground the cables. cable assembly manufacturing must be grounded at all termination details, splices and creating entrances. The cable steel armor need to be connected to a ground wire using a compression-variety clamp. The cable ground wire is then bolted to a nearby floor terminal strip.
5. Fiber optic cable least bending radius must usually be noticed in the course of set up.