Underground Non-Metallic Fiber Optic Cables (UGNMFOC) with 96-cores Dispersion
Un-shifted Single-Mode (ITU-T- G.652D)
A. Underground non-metallic fiber optic cable shall meet ITU-T G.652d
specifications (Note: Refer to Sections 1.02.A for specific type of fiber optic
cable required per link) and all the requirements of this Scope of
Work/Technical Specifications and COMPANY Material Standard
Specification 48-TMSS-02, Rev. 02. The cables shall be supplied with
approved end seals (waterproof), which shall not be removed until
immediately prior to optical jointing.
Optical loss variation in the temperature range -20°C to the temperature reached during fault
current at the worst environmental conditions shall not exceed 0.05 db.
A.
The 96 cores underground non-metallic fiber optic cable (U/G-NMFOC)
shall be installed inside the rigid HDPE-Duct in dedicated duct-banks and
manhole/hand holes, and routed up to the communication room in
accordance with SEC Transmission Construction Standard TCS-T111.08 and/or by means of Cable Blowing Method (Also called "Jetting").
This procedure shall be done with the use of Industry-standard cable
blowing machines, either Pneumatic or Hydraulic. CONTRACTOR shall
also use necessary tools and accessories, such as duct lubricants, cable
storage device, coolant, and others. CONTRACTOR shall ensure that all
necessary precautions are taken into account to facilitate a safe and
secure installation for the people, property, materials and equipments.
NOTE: Cable Blowing Method is preferred than the conventional Manual
Pulling Method of the underground fiber optic cable inside the HDPESubduct.
B.
CONTRACTOR shall field verify on site to determine/measure the length
of Fiber Optic Cables that are required in this Project before any cutting
or pulling of cables is to be done. CONTRACTOR shall take into
consideration, number of joint boxes and extra length of cable coiled
inside joint box, handholes and communication room.
Sufficient extra length (at least 15 meters) of the underground fiber optic
cable shall be securely and carefully coiled inside the end manhole/hand
holes and splicing point hand holes for future splice requirements. All
other location of hand holes shall be provided with an extra two coils (at
least 5 meters) of fiber optic cable. All exposed portions of the
underground non-metallic fiber optic cable (e.g. coiled extra lengths, cable
laid on cable trays, etc. shall be provided with protective Sub duct (or
COMPANY approved equivalent) on manhole/hand hole and inside the
building shall be corrugated, flexible with 25 mm outside diameter.
Protective Sub duct inside the building shall be fire/flame retardant (2
hours UL fire rating). Protective Sub-ducts installation shall be in
accordance with SEC Transmission Construction Standard TCS-T111.08. Nylon pull ropes 1/4-inch diameter (of different colors) shall be
provided and installed in all vacant duct/sub-ducts.
D.
All other locations of communication manholes/hand holes along the
routing path shall be provided with a minimum two (2) coils (5 meters)
of Fiber Optic cable to allow for manhole/hand-hole distribution and future
cable cuts.
D.
All necessary and required communication conduits, sub ducts, cable
trays, raceways and ladders shall be provided by the CONTRACTOR to
completely route the optical fiber and other communication cables from
their designated ends up to the communication equipment locations.
E.
Splicing requirements, At all Fiber Optic’s splice locations where CONTRACTOR shall
be required by SEC to splice Underground to Underground Fiber Optics
cable in accordance with SEC Transmission Construction Standard TCST-111.06.
The average loss per splice shall be 0.05 dB maximum (measured in both
direction), the Optical Fiber splice loss measured in each direction using
an OTDR shall be 0.15 dB maximum.
F.
Fiber Optic Splicing shall be done by experienced Fiber Optic cable splicer’s
(COMPANY approved/certified) using an Automatic Fusion Optical Fiber
Splicing Machine with built-in estimated Optical Fiber Splice Loss
Reading capability. The estimated splice loss shall be less than 0.05 dB.
G.
Fiber Optic Testing shall be done by experienced Fiber Optic cable tester
(COMPANY approved/certified) using state of the art, precise and
calibrated fiber optic cable test equipments.