SECTION 16479
FIBER OPTIC CABLES AND ASSOCIATED EQUIPMENT
PART 1 GENERAL
1.1 SCOPE
A. Provide new MULTIMODE 12-fiber indoor/outdoor rated fiber optic cables as specified herein and as shown on drawings.
B. The work in this section includes providing a fiber optic communications infrastructure including, but not limited to, fiber optic cables, fiber optic interconnect centers (FOIC), Fiber Optic ST connectors installed at the end of each fiber strand, and fiber optic jumpers as specified herein and as shown on drawings.
C. The work in the section includes the testing of all installed fiber strands and providing testing documentation to Owner and Engineer.
1.2 SUBMITTALS
A. Submittals shall be in accordance with Sections 01300, 01730 and Division 16000.
B. Catalog data for all provided fiber optic infrastructure components including but limited to fiber optic cables, fiber optic interconnect centers (FOIC), Fiber Optic ST connectors, fiber optic jumpers as specified herein and as shown on drawings.
C. Detailed bill of materials of supplied fiber optic materials with part numbers and supplier names and telephone numbers.
D. Catalog data for all tools that will be used to terminate the ST connectors on the individual fiber strands.
E. Catalog data for testing devices proposed for use plus certification of accuracy.
F. Test plan for all fiber optic cables.
G. Test reports.
1.3 REFFERENCE STANDARDS
A. Fiber optic cabling system shall conform to the latest issue of the following standard documents which are incorporated by reference into this specification.
1. EIA-455: Standard fiber Optic Test Procedures (FOTPs) Devices.
2. EIA-598-A: Standard Colors for Color Identification and Coding.
3. MIL-202: Test Methods for Electronic and Electrical Component Parts.
4. MIL-454: Standard General Requirements for Electronic Equipment.
5. MIL-810: Environmental Test Methods and Engineering Guidelines.
6. EIA-568-B.3: Commercial Building Telecommunications Cabling Standard: Optical Fiber Cabling Components.
7. ICEA 5-83-696: Fiber Optic Premises Distribution Cable (Indoor/Outdoor).
8. National Electric Code (NEC) Article 770.
9. UL 1581 VW-1 Vertical Tray Cable Flame Test.
10. UL 1666 – UL Standard for Safety Test for Flame-Propagation Height of Electrical and Optical-Fiber Cables Installed in Vertical Shafts.
11. UL-910, NFPA 262 – standard Method of Test for Flame Travel and Smoke of wires and Cables for use In Air-Handling spaces.
12. IEEE Standard 383 – Flame Retardancy.
13. DOD-STD-1678.
14. National Electrical Manufacturers Association (NEMA).
15. Where Reference is made to one of the above standards, the revision in effect at the time of bid shall apply.
B. All fiber optic cables shall be constructed in accordance with EIA-455, and 100 percent of all fibers and jacketing shall meet or exceed the requirements contained in this specification.
1.4 QUALITY ASSURANCE
A. The cable manufacturer shall be ISO9001 certified and registered.
B. The fiber optic cabling system materials furnished under this Section shall be provided by fiber optic suppliers who have been providing these types of materials for the past four years. The fiber optic suppliers shall provide personnel capable of provided technical assistance during installation.
C. The fiber optic cabling system materials furnished under this Section shall be performed provided by personnel who have been installing these systems for the past three years.
D. The fiber optic supplier must demonstrate that the fiber optic cabling proposed for use on the Project has been installed and is in successful operation in at least five other installations of a similar size and complexity.
E. The Owner and Engineer will determine whether a product is an equal to that specified based on submitted information. Alternate products must meet the criteria listed herein and any additional information in the approved manufacturer’s data sheets in order to be considered as an equal.
PART 2 PRODUCTS
2.1 FIBER CABLE CHARACTERISITICS
A. All fibers in the cable must be usable fibers and meet requirement of specifications.
B. Each optical fiber shall consist of a doped silica core surrounded by a concentric silica cladding. The fiber shall be matched clad design.
C. MULTIMODE 62.5/125 um which meets EIA/TIA-492AAAA-1989; Core diameter 62.5
+/- 2um, Cladding diameter 125.0 +/- 3um, Cladding non-circularity offset 2.0%, Core non-circularity 5.0%, Coating diameter 245 +/- 10um, Colored fiber diameter nominal 250um, Graded index, Numerical aperture 0.275 + 0.015um.
D. Each cable shall have a minimum of 24 fibers with male ST connectors at each end of each fiber strand.
E. The maximum attenuation shall be 3.5dB/km or less at a wavelength of 850 nm and 1.5 dB/km or less at a wavelength of 1300nm. Bandwidth of each fiber shall be >200Mhzkm at 850nm and > 500Mhzkm at 1300nm. The fiber manufacturer shall proof-test 100% of the fibers to a minimum load of 100 kpsi.
F. The fiber shall be guaranteed to be compatible with laser-based 10 gigabit Ethernet transmission systems for lengths up to 300 m, 1 gigabit transmission systems for lengths up to 550 m, and 100megabit transmission systems for lengths up to 2 kilometers.
G. Operating temperature range shall be -20 to +70 Degrees C. Storage temperature of down to -40 Degrees C.
H. Cables shall be tested for Crush Resistance, Impact resistance and Cyclic Flexing in accordance with FOTP-41, FOTP-25, and FOTP-104 respectively.
2.2 FIBER OPTIC CABLE CONSTRUCTION
A. The fibers shall be stranded around a dielectric member and surrounded by layered aramid yarns. The aramid yarns shall serve as a tensile strength member on the cable. A ripcord may be applied between the aramid yarns and the outer jacket to facilitate jacket removal. The outer jacket shall be extruded over the aramid yarns for physical and environmental protection.
B. The strength member shall be a high modulus aramid yarn. The aramid yarns shall be helically stranded around the buffered fibers. Non-toxic, non-irritant talc shall be applied to the yarn to allow the yarns to be easily separated from the fibers and the jacket.
C. The cable and subunit jacket shall be orange.
D. The cable jacket shall be continuous, free from pinholes, splits, blisters, or other imperfections. The jacket shall have a consistent, uniform jacket. Jackets extruded under high pressure are not acceptable. The jackets shall be smooth, as is consistent with the best commercial practices. The jacket shall provide the cable with a tough flexible protective coating able to withstand the stresses expected in normal installation and service.
E. The nominal thickness of the cable outer jacket shall be sufficient to provide adequate cable protection while meeting the mechanical, flammability, low smoke, and environmental test requirements of this document over the life of the cable.
F. The individual fibers shall be color coded in accordance with EIA/TIA-598. Coloring material shall be stable over temp range of cable, shall not be susceptible to migration, adhere to each other or affect transmission characteristics of the optical fibers.
G. Cables shall be dielectric design.
2.3 FIBER OPTIC INTERCONNECT CENTERS (FOIC)
A. Specifically designed for mounting on wall in building entrance terminals, wiring closets, inside electrical enclosures, and other open building areas.
B. Complete with Universal Cable Clamp, Cable Strain Relief, Fiber Guides, Spice trays and Routing Guides for fiber management.
C. Metal housing with lockable doors.
D. Complete with ST type connector panels for all 12 fibers, designed to mate two multimode fibers one from internal fiber cable and the other outside fiber jumpers. Closet Connector Housing Panels to be ST Compatible adapters, 62.5 µm multimode. Adapter material to be metal and insert material to be ceramic.
E. Free of hazardous substances according to RoHS 2002/95/EG.
2.4 FIBER OPTIC TERMINATIONS AND CONNECTORS (PREFERRED METHOD)
A. Pigtail-type splices shall be used for termination of each fiber strand in each fiber cable. One end of each pigtail shall have a piece of cable preconnectorized and the other end unterminated for spicing to the cable fiber strands. The FOICs shall house the splices between the pigtail and the cable fiber strands. Pigtail assemblies shall match the fiber cable type and shall be manufactured by the same company as the fiber cable.
B. Fiber optic connectors shall be stainless steel ST style connectors for all fibers. The connectors shall be designed for 62.5/125 micron cable. Connector shall have a maximum signal attenuation of 1.6dB. All connector assemblies (pigtails) shall have connectors installed at the factory. Connectors shall provide tight fitting terminations to the cladding and buffer coating. Epoxy-based or hot melt adhesives shall be used to bond the fibers and buffer to the connector ferrule and body prior to polishing the endface.
C. Connector specifications shall be as follows:
1. Insertion Loss (typical): 0.3dB
2. Durability (mating cycles): 500 minimum
3. Repeatability: Less than 0.2dB
4. Operating Temperature: -40 to 80 Degrees C
5. Connection/Reconnection Temperature: 0-60Degrees C.
D. Individual coated fibers within the fiber cable shall use a fan-out kit to maintain flexibility and ease the handling in the FOICs. The fan out kits shall be installed to transition the loose fibers to the ruggedized tight-buffered fiber pigtail cables. Optical fusion splices shall connect the loose tube fibers to the tight –buffered pigtail cables.
Splice protection sleeves shall be employed on all splices to protect the splices. Optical splice loss shall comply with the specifications for optical splices.
E. Fiber Optic pigtail terminations with ST Connectors shall meet or exceed the applicable provisions of EIA-455-5, 455-2A, 455-34.
2.5 FIBER OPTIC TERMINATIONS AND CONNECTORS (ALTERNATE METHOD)
A. ST connectors shall be field installed on each fiber strand in each fiber cable. The FOICs shall house the connectorized cable fiber strands. Connectors shall match the fiber cable type and shall be manufactured by the same company as the fiber cable.
B. Fiber optic connectors shall be stainless steel ST style connectors for all fibers. The connectors shall be designed for 62.5/125 micron cable. Connector shall have a maximum signal attenuation of 1.6dB. Connectors shall provide tight fitting terminations to the cladding and buffer coating.
C. Connector specifications shall be as follows:
1. Insertion Loss (typical): 0.3dB
2. Durability (mating cycles): 500 minimum
3. Repeatability: Less than 0.2dB
4. Operating Temperature: -40 to 80 Degrees C
5. Connection/Reconnection Temperature: 0-60Degrees C.
D. Termination tool kits used to strip the cables and install the ST connectors shall be the make and model recommended by the cabling manufacturer and shall be provided by the cable manufacturer. Fiber Optic Termination tool kit cut sheets shall be submitted along with detailed instructions and procedures which will be used to install the connectors.
E. Individual coated fibers within the fiber cable shall be protected with the use of fan out kits as recommended by the cable and FOIC manufacturer. The fan-out kit shall maintain flexibility and ease the handling of the individual fibers in the FOICs. Fan out kits shall be the make and model recommended by the cabling manufacturer and shall be provided by the cable manufacturer.
F. Fiber Optic pigtail terminations with ST Connectors shall meet or exceed the applicable provisions of EIA-455-5, 455-2A, 455-34.
2.6 MANUFACTURERS
A. Belden Cable
B. CommScope
C. Corning Cable Systems
D. Optical Cable Corporation
2.7 FIBER OPTIC PATCH CABLES
A. Fiber optic patch cables shall be two –fiber zipcord 62.5/125 multimode riser rated cable.
B. Patch cords shall be orange with ST connectors on each end. Each fiber stand shall be labeled on both ends with same number.
C. UL labeled.
D. Manufacturer: Corning
PART 3 EXECUTION
3.1 INSTALLATION
A. Run fiber optic cable in conduit. Conduit system shall include 90 degree sweeping elbows in compliance with the manufacturer’s minimum bend radius.
B. Contractor to coordinate cable and connector purchase Owner.
C. Provide all material, equipment, and labor to test and install the fiber optic system as shown on the drawings and as specified herein.
D. Installation shall comply with EIA/TIA Standards 568 and 569.
E. Fiber cables shall be continuous form FOIC to FOIC. Intermediate fiber splices will not be allowed.
3.2 TAGS AND LABELS
A. Provide metal or flame-resistant adhesive label tags to identify the cable source and destination.
B. Label each termination point.
3.3 FIBER OPTIC CABLE TESTING
A. Perform pre-installation and post –installation fiber optic cable (FOC) tests. The Owner and Engineer shall be notified a minimum of 10 days in advance so that these tests can be witnessed at the discretion of the Owner and Engineer. All test equipment shall be traceable to NIST standards.
B. Test equipment: Use the following to perform pre-installation and post-installation FOC tests:
1. Optical time domain reflectometer (OTDR). The OTDR shall be of laser precision quality, and be able to test multimode systems with a visual fault locator. The OTDR shall be as manufactured by Corning, Agilent Technologies, Fluke Networks, or approved equal.
C. Pre-installation Tests:
1. The purpose of these tests is to perform acceptance tests on the cable prior to installation to verify that the cable conforms to the manufacturer’s specifications; is free of defects, breaks, and damages by transportation and manufacturing processes; and it provide baseline readings in dB.
2. Prior to removal of each cable from the delivery reel, all optical fibers within the cables shall be tested using an OTDR. The OTDR tests shall consist of end-to- end length and fiber attenuation (dB/km) measurements to ensure proper performance of the fiber optic cable. The tests shall be performed from both ends of each fiber to ensure complete fiber continuity within the cable structure.
3. Pre-installation, “on-reel” test results shall be compared with the manufacturer’s test report delivered with the cable. Gross dissimilarities shall be noted and remedied by the contractor. In all cases, all fibers must meet the optical attenuation specifications prior to cable installation.
4. Perform tests on all reels of cable. The Owner and Engineer shall be notified a minimum of 10 days prior to any test.
5. Document each test and submit the report to the Owner and Engineer for review. Documentation shall consist of both hard copy and electronic disk complete with all application software.
6. Cable shall not be installed until the Owner and Engineer have reviewed the test report.
7. Maximum allowable attenuation is 0.5 dB/km at 1310 and 1550 nm. The Contractor shall replace any cable in which any fiber does not meet this requirement.
D. Post-installation tests: After the fiber optic cable has been installed and connectorized, the following tests shall be performed:
1. Visually inspect terminal connectors for out-of-round condition and surface defects such as micro-chips and cracks using a 200x (minimum) inspection microscope.
2. A recording OTDR shall be used to test for end-to-end continuity and attenuation of each optical fiber. The OTDR shall have an X-Y plotter to provide a hard copy record of each trace of each fiber. The OTDR shall be equipped with sufficient internal masking to allow the entire cable section to be tested. This may be achieved by using an optical fiber pigtail of 30 feet or more to display the required cable section.
3. The maximum permissible end-to-end loss shall be 0.5 dB/km. The Contractor shall replace any cable in which any fiber does not meet this requirement.
4. The OTDR shall be calibrated for the correct index of refraction to provide proper length measurement for the known length of reference fiber.
5. This test shall be conducted in both directions on each fiber of each cable.
6. Hard and electronic copies of test documentation shall be submitted to the Owner and Engineer. The documentation shall include:
a. The trace plot.
b. Index.
c. dB/km loss.
d. Cable length.
e. Date and time of test.
f. Wavelength.
g. Pulse width.
h. Test site layout.
i. Cable ID number.
j. Fiber number and type.
k. Operator’s initials.
The Contractor shall compare the pre-installation test results to the post installation results. If a deviation of greater than one dB occurs, the Owner and Engineer shall be notified in writing by the Contractor, and the cable shall be removed and replaced at no additional cost to the Owner.
7. Upon completion of testing, the ends of all fiber optic cables shall be secured with end caps to prevent intrusion of dirt and water.
E. Certification of completion of pre- and post-fiber installation testing including test results shall be provided to the Owner and Engineer. Test results shall be submitted on paper in a binder, including results indicated in tables or spreadsheets. Test results that exceed specification limits shall be noted. The electronic copy shall be included in the binder.
F. Required OTDR Trace Information:
1. All traces shall display the entire length of cable under test, highlighting any localized loss discontinuities (installation-induced losses and/or connector losses). The trace shall display fiber length (in kilometers), fiber loss (dB), and average fiber attenuation (in dB/km), as measured between two markers places as near to the opposite ends of the fiber under test as is possible while still allowing an accurate reading. Care shall be taken to ensure that the markers are placed in the linear region of the trace, away from the front-end response and far-end Fresnel reflection spike. Time averaging shall be used to improve the display signal to noise ratio. The pulse width of the OTDR shall be set to a sufficient width to provide adequate injected power to measure the entire length of the fiber under test.
2. The OTDR trace shall also include the following information:
a. The date and time of the test.
b. The cable ID number.
c. The cable segment ID number.
d. The fiber color or sub-cable number.
e. Launch point connector number.
f. The optical wavelength used for the test.
g. The refractive index setting of the OTDR.
h. The pulse width setting of the OTDR
i. The average interval of the test.
3.4 WARRANTY
A. The Contractor shall provide an unconditional warranty on all installed cable for a minimum period of 20 years, commencing at the time of final acceptance by the Owner.
END OF SECTION
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