|
“Figure –8”
Fibre Optic cable is a self-supporting cable which greatly simplifies
the task of placing fibre optic cable in an aerial span. It incorporates
both steel messenger and the core of a standard optical fibre cable
into a single jacket of “Figure-8” cross section. The
combination of strand and optical fibre into a single cable permits
quick, easy one step durable installation.
The tension on the “Figure-8” cable
is applied and maintained on the messenger component of the cable.
On standard “Figure-8” cable tension up to 9000 N may
be applied. During installation this max tension should be kept
in mind.
The maximum bend radius during installation is another important
factor to be considered. Excessively sharp bends can damage fibres
within fibre optic cable. The value can be determined using following
table.
[Minimum Bend Radius]
Cable component
dia. (mm) |
Min. Bend
Radius (cm) No Tension |
Min. Bend
Radius (cm) In Tension |
6-10 |
10 |
15 |
10-15 |
15 |
22.5 |
15-20 |
20 |
30 |
| 20-23 |
23 |
34.5 |
| 23-25 |
25 |
37.5 |
Like other fibre optic cable, smaller unit mass as compared to copper
equivalent, results in lesser sag over a given aerial span.
|
