The duct optical fiber cable is with loose tube core, it is quite suitable to the system requiring more optical cable fibers. The fibers are accommodated in jelly filled tubes with an excess length. If a flame retardant characteristic is required, a special material can be applied as the outer sheath.

Construction:

1.   PE sheath

2.   Laminated aluminium polyethylene tape

3.   Water blocking tape

4.   Jelly filled interstices

5.   Peripheral strength member (aramid yarn)

6.   Rip cord

7.   Binder

8.   Filled rod

9.   PE Strength member jacket

10. Steel rod for central strength member

11. Gel filled PBTP color code tube

12. Single mode color coded optical fiber

13. Quad twisted copper conductor (optional)

14. PE insulation (optional)