OBUC 72 core dry fiber optic cable (6×12)

72-Core NZ Brand PBN Non-Zero Dispersion Fiber Optic Cable (OBUC) with (ITU-G655) cores. The 72-core fiber optic cable consists of 12 loose tubes made of PBT material, and there are 6 optical cores inside each loose tube, and we do not have any loose tubes filled with fillers. This category of cables is suitable for direct burial under soil and environments with rodents and for long distances. In the following, the structural features of this type of optical fiber are discussed. All properties are fully compatible with the latest revision of TCI specifications.

OBUC 72 core dry fiber optic cable (6×12)

PBN OBUC-SM is an optical fiber ground cable that can be directly buried underground, the non-zero dispersion fiber is built according to ITU/TIA G655. This cable is resistant to ultraviolet rays due to the use of black high-density polyethylene (HDPE) and steel tape. This cable is suitable for use in core resistive member applications and can be used with 2 to 144 fiber optic cores.

Attributes
Waterproof
UV resistant
Armored corrugated steel strip
Complete protection against rodents
Direct burial
Has two jackets
Non-zero dispersion – shifted
Fiber optic facilities
Fiber attenuation at 1550 nm: ≤ 0.21 dB/km
Fiber attenuation at 1625 nm: ≤ 0.24 dB/km
Influence from the environment: ≤ 72 µm
Mode Field Diameter (MFD) at 1550 nm: 9.2 ± 0.5 um
Cable cutoff (λcc): ≤ 1450 nm
PMD @ 1550 nm: ≤ 0.06 ??/√?m
Physical characteristics of microcable
Cable diameter: Typ 9 µm
Non-circular core: ≤ 0.8%
Core coating deviation: ≤ 0.5 µm
Coating diameter: 125 ±0.7 µm
Non-circular coverage: ≤ 12%
Cover diameter: 242 ± 5 µm
Cable structure
Optical fiber
Waterproof thixotropic jelly
Central resistive element
loose tube
filler (if any)
Relaxed thread
Outer jacket

Central resistance member

Fiber reinforced polymer (FRP) with a diameter of 2.5 μm is used as a central resistive element. Young’s modulus of FRP is 50,000 N/mm2 and water absorption is 0.1% maximum.

loose tube

Lovetubes are made of polybutene terephthalate (PBT) with a minimum thickness of 0.4 mm. The fibers are spirally placed in the loose tube to have the ability to expand and contract the fibers. In order to prevent water penetration, loose tubes are filled with thixotropic gel.

Cable core

Loose tubes and their fillers (if any) are located on the central resistive element. Fillers are polyethylene rods that are used to round the cable core when needed. It has a water-swollen thread wound around the central resistive element for waterproofing purposes. At the end, a binder thread is spirally wrapped around them to keep the core flat.

Swollen bar

To make the cable waterproof, the core is wrapped in inflatable tape. Inflating tape is also composed of corrosion inhibitors.

outer jacket

Black HDPE (High Density Polyethylene) according to ASTM-1248 covers the entire cable as a 2 mm thick outer jacket.

Ripcord

Under the outer jacket, two Ripcords are placed to assist the operator in removing the jacket.