270500 DATA COMMUNICATION SYSTEM 21023.pdf

DATA COMMUNICATION SYSTEM 270500 - 1

SECTION 270500 - DATA COMMUNICATION SYSTEM

PART ONE GENERAL

1.01 SUMMARY

A. Provide premise wiring for data and Net distribution, as indicated on the Drawings.

1.02 SUBMITTALS

A. Product data for each product indicated/specified.

1. Twisted Pair Cable.

2. Connectors.

3. Faceplates.

B. Field Test Report.

1.03 SUBMITTALS

A. Product data for each type of product specified.

B. Test data and as-built drawings. Test Data is due to DMVA design department before substantial completion is reached. All data jacks and cable connections systems shall be certified Category 6.

1.04 SYSTEM OVERVIEW

A. This section specifies the requirements for wire, cable, connections devices, installation, and testing for wiring systems to be used as signal pathways for high-speed data transmission.

1.05 QUALITY ASSURANCE

A. All cable shall be installed and terminated to meet 100-Base T standards as defied by EIA-TIA-568 standards.

B. The contractor shall be responsible for the most efficient routing of the cable in conduit. The cable route must avoid any electrical equipment, such as fluorescent lighting, transformers, etc. that could induce noise on the cable.

C. Codes and Standards

1. IEEE Compliance - Comply with Std 241, "IEEE Recommended Practice for Electric Power Systems in Commercial Buildings" pertaining to communication systems.

2. EIA Compliance - Comply with EIA Standards RS-453, 455, and 464 pertaining to installation of telephone systems.

3. ANSI/ICEA S-80-576 (1988) Communication Wire and Cable for Wiring Premises.

4. NFPA National Electrical Code.

5. REA 345-52 Service Entrance and Station Protector Installations (PC-5A).

6. REA 345-78 Carbon Arrestor Assemblies for Use in Protectors

7. ANSI/T1A/EIA – 568-B.2-1 Transmission Performance Specifications for 4-Pair 100 ohm Category

6 Cabling.

PART TWO - PRODUCTS

2.01 CONDUIT, OUTLET BOXES, AND COVER

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A. Provide boxes and conduit in accordance with Sections GENERAL ELECTRICAL REQUIREMENTS.

1. Mount boxes flush in finish walls to match height of 120-volt receptacles, unless indicated otherwise.

2.02 TWISTED PAIR CABLE

A. All of the voice and data locations shall be wired with unshielded twisted pair (UTP) cable that is category 6 rated and has a total of four (4) pair of copper conductors. The two data cables, shall be separate cables. All of the category 6 rated cable shall be plenum rated.

B. Data Cable Jacket Color: Cable jacket color shall be factory applied and continuous along the entire length of the cable. Colors as follows:

1. Jacket color for the data cable shall be blue in color.

2. Jacket color for the second data cable shall be blue in color.

C. The wiring code of the cable will follow the ANSI/TIA/EIT-T568B (AT&T), option B standards

Pair 1 Blue/White Pin 4 White/Blue Pin 5 Pair 2 White/Orange Pin 1 Orange/White Pin 2 Pair 3 White/Green Pin 3 Green/White Pin 6 Pair 4 White/Brown Pin 7 Brown/White Pin 8

2.03 CONNECTORS

A. All category 6 UTP cabling (Wall Jacks) shall be terminated into snap-in 110 type CAT 6 RJ-45 connectors and meet TIA/EIA-568-B2.1, Cabling Transmission Performance Specifications for 4-Pair 100 ohm Category 6 Cabling. Products from Hubbell are preferred, RJ-45 Model HXJ 6 OR-orange, HXJ 6BL-blue. A minimum of two data jacks will be provided at each customer interface point (voice/data outlet).

1. The top data jack shall be blue in color.

2. The bottom data jack shall be orange in color.

2.04 FACEPLATES

A. Faceplates shall be high impact 94V-O rated thermoplastic of the appropriate type. Each faceplate shall fit a single-gang box opening and hold four jacks in a vertical orientation. The jack layout and size of the faceplate shall be as follows:

1. Faceplate size: single-gang box opening.

a. Jack orientation: Two jacks in vertical alignment next to two more jacks in vertical alignment.

B. Voice, Data faceplate color shall match the electrical device plate color. If the electrical device plate is metallic, then the voice and data faceplate shall be ivory in color.

2.05 CABLE AND FACEPLATE IDENTIFICATION

A. The finished installation shall have labeling provided at each end of each cable with a permanent wrap around tag that is 6" from the end of the cable. This label should not be discarded during the installation process.

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B. All faceplates shall have each jack location identified with a permanent label that is neatly applied. This label will include the category of use, and the cable number (EX. To-001); coordinate labeling with DMVA telecommunications mechanic.

PART THREE - EXECUTION

3.01 INSTALLATION

A. All customer interface (data outlet) boxes shall be 4”x4” boxes with a 2-gang plaster ring.

B. Install cabling concealed in ceiling and walls. Cabling to be parallel and perpendicular to surfaces, and follow surface contours. Secure and support cables by straps, staples, or similar fittings so designed and installed to avoid damage to cables. Secure cables at intervals not exceeding 30 inches and not more than 6 inches from cabinets, boxes, or fitting.

C. Install cabling using techniques, practices, and methods that are consistent with categories and RG type rating at components and that ensure category 6 and RG type performance of completed and linked signal path, end to end.

D. Install cables without damaging conductor’s shields or jackets. A minimum cable installation bending radius shall be observed. Minimum bend radius is defined as a radius of curvature no less than 4 times the outside diameter of the cable.

E. The contractor shall be responsible for the most efficient routing of the cable in conduit. The cable route must avoid any electrical equipment, such as fluorescent lighting, transformers, etc. that could induct noise on the cable.

F. Each wall jack location shall have a single, continuous two (2) 4-pair cable pulled to it from the source location. No splices between the patch panel and the wall jack will be accepted. A minimum of 12-inches of excess cable will be left after termination, coiled neatly inside the 4”x4” wall box, and the minimum bend radius for the coil will be observed. A service loop of no less than six feet of excess cable will be neatly coiled above the equipment rack while ensuring that minimum bend radius is observed.

G. 100% of the category 6 (UTP) cabling will be installed and tested in accordance with T1A/EIA-568-B2.1

Clause 11, Cabling Transmission Performance and Test Requirements. The contractor shall use an electronic testing device to test each cable for the following: (Submit printed output from this test device to DMVA for review.)

1. Attenuation

2. Impedance

3. Capacity

4. Resistance

5. Length

6. dB loss

7. Pin Assignments

8. Continuity

9. Polarity

10. Near end cross talk

H. Scan and test each cable using industry standard equipment for items 1 – 10 above. The results shall be produced in electronic copies and provided to the DOIM/DMVA Network Engineer in MS Excel format.

I. Data for each measurement shall be documented. Data for submittals shall be printed in a summary report that is formatted similar to Table 10.1 in BICSI TDM, or transferred from the instrument to the computer, saved as text files, and submitted. Electronic submittals are sufficient.

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J. Remove and replace cabling where test results indicate that they do not comply with specified requirements.

K. Retest and inspect cabling to determine compliance of replaced or additional work with specified requirements.

3.02 CABLE IDENTIFICATION

A. Common Areas & Office Marking Standard:

1. The connection boxes placed on walls or in the bases of cubical furniture shall be labeled clockwise from the main entrance door A1-1, B1-1, A1-2, B1-2, etc around the outside wall, then to interior walls and cubical connections until all interfaces are designated. A1/B1 specifies the patch panel number. The -# specifies the patch panel port number. Top, or blue data jacks, will be labeled as the A drops. Bottom, or orange data jacks, will be labeled as the B drops.

2. Blue data jacks, (A labeled jacks), will be terminated in patch panels and labeled accordingly at the rack. Orange data jacks, (B labeled jacks), will be terminated in SEPARATE patch panels and labeled accordingly at the rack. The end state is to have A drops and B drops on separate physical patch panels.

3. Patch panels will be labeled as PP A-1 and PP B-1. When there are more than 24 data drop locations, additional patch panels will be added and labeled PP A-2/PP B-2 and so on. Data drops will reflect this as A2-1,B2-1. This marking would specify PatchPanel A2 Drop #1, PatchPanel B2 Drop #1.

END OF SECTION 270500