COMMUNICATIONS CABLING STANDARDS

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COMMUNICATIONS

CABLING STANDARDS

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INTRODUCTION ...4

I. ABOUT THIS MANUAL...4

II. COMMUNICATIONS RESOURCES’ RESPONSIBILITIES FOR PROJECTS...4

III. THE TELECOMMUNICATIONS DISTRIBUTION SYSTEM DESIGN PROCESS FOR UC DAVIS...6

IV. OVERVIEW OF THIS MANUAL...7

THE HORIZONTAL SEGMENT ...8

I. THE DESIGN PROCESS...8

II. THE TYPE AND NUMBER OF OUTLETS...8

III. CABLE TYPES AND LENGTHS...9

IV. TERMINATION HARDWARE REQUIREMENTS AT THE OUTLET...11

V. ASSIGNING THE NAM NUMBERS TO THE APPROPRIATE LOCATIONS, AND NAM MATRICES. ...11

VI. CROSS CONNECTING VOICE NAMS. ...12

VII. STRUCTURES TO SUPPORT THE HORIZONTAL CABLING...12

VIII. CABLE TESTING PROCEDURES...16

THE INTERMEDIATE DISTRIBUTION FRAME ...20

II. THE SIZE OF THE IDF ...20

III. THE LOCATION OF THE IDF...21

IV. DESIGN REQUIREMENTS...21

V. TERMINATION HARDWARE REQUIREMENTS IN THE IDF...23

VI. STRUCTURES TO SUPPORT THE CABLING IN THE IDF ...25

VII. DRAWINGS FOR CONSTRUCTION/PROJECT MANAGERS...27

THE RISER SEGMENT...30

II. THE SIZE OF THE COPPER RISER CABLE...31

IV. STRUCTURES TO SUPPORT VERTICALLY ALIGNED IDFS...32

V. STRUCTURES TO SUPPORT HORIZONTALLY OFFSET IDFS...34

THE BUILDING DISTRIBUTION FRAME...36

II. THE SIZE OF THE BDF...36

III. THE LOCATION OF THE BDF ...37

IV. DESIGN REQUIREMENTS...38

V. TERMINATION HARDWARE REQUIREMENTS IN THE BDF ...39

VI. STRUCTURES TO SUPPORT THE CABLING IN THE BDF ...42

VII. CABLE PATHWAYS ENTERING THE BDF ...43

VIII. DRAWINGS FOR CONSTRUCTION/PROJECT MANAGERS...45

THE CAMPUS SEGMENT...47

II. CABLE ROUTES...47

III. CABLE DISTRIBUTION METHODS...48

IV. UNDERGROUND (IN CONDUIT) AND DIRECT BURIED CABLE REQUIREMENTS...48

V. CABLE TYPES...51

VI. SPLICE BOXES, MANHOLES, AND PULL BOXES...56

VII. AERIAL CABLE REQUIREMENTS...60

VIII. ELECTRICAL PROTECTION AND BONDING/GROUNDING REQUIREMENTS...61

APPENDIX A...62

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SPECIFICATION 01 ...63

NETWORK ACCESS MODULE (NAM)...63

FACEPLATES...65

CONDUIT...66

HORIZONTAL CONDUIT CAPACITY...67

CABLE TRAYS...68

COLOR CODES FOR CROSS CONNECT FIELDS...69

DISTRIBUTION CABINETS...70

CONDUIT FILL FOR RISER CABLES...81

PULL BOXES...82

CONDUIT FOR UNDERGROUND CABLING...84

ELECTRICAL PROTECTION, BONDING/EARTHING...86

APPENDIX B...89

REFERENCE MATERIALS...89

APPENDIX C...92

GLOSSARY...92

APPENDIX D...103

UC DAVIS POLICY AND PROCEDURE MANUAL, SECTION 310-10...103

APPENDIX E...104

NAM MATRICES:...104

VOICE NAM MATRIX ...104

DATA NAM MATRIX: ...105

MATV NAM MATRIX: ...106

APPENDIX F ...107

SUPPORTING STANDARDS FOR IN-BUILDING RADIO COMMUNICATION SYSTEM AMPLIFICATION...107

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INTRODUCTION

I. About This Manual

A. This manual contains the policies and procedures for architects, contractors, and telecommunications design professionals who are involved in telecommunications projects on the UC Davis campus. The manual should be used as a guide for projects providing telecommunications cabling. Work may include new or renovated buildings and may consist of upgrading or adding cabling infrastructures, cable and network electronics equipment.

B. This manual assumes that the user is familiar with telecommunications

distribution systems, the cable and hardware used in them, the cabling pathways and support structures and the installation of cabling in buildings and campus environments. It is not intended to be a training manual in telecommunication distribution systems nor to replace existing industry standards.

C. Request for waivers or clarification of specific design issues must be forwarded to the Manager System Engineering & Development, UC Davis Communications Resources.

II. Communications Resources’ Responsibilities for Projects

A. Communications Resources is responsible for UC Davis’ inside and outside telecommunications system facilities, and network connectivity and the associated backbone equipment. Communications Resources’ responsibilities are outlined in the UC Davis Policy and Procedure Manual, Section 310-10 found in Appendix D.

B. These responsibilities include the review of all new telecommunications project plans.

1. Project Plan Reviews:

a) Communications Resources shall be provided copies of the Project Planning Guide (PPG), Capital Improvement Budget (CIB), Detailed Project Program (DPP), Design Guide or other such documents describing the University approved program. 1These documents shall be provided to Communications Resources upon approval of the governing agency, responsible for managing that project.

b) Communications Resources shall be provided schematic design (SD) documents for review at each stage of the schematic design

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process, and provided a minimum of ten workdays from date documents are received by CR for review and return of comments c) Communications Resources shall be provided Design

Development (DD) documents for review at each stage of the Design Development process, and provided a minimum of ten workdays from date documents are received by CR for review and return of comments

d) Communications Resources shall be provided Construction Documents (CD) for review at each stage of the Construction Document process, and provided a minimum of ten workdays from date documents are received by CR for review and return of

comments

B. When a new building or building renovation is planned, architectural drawings are typically released for review by Communications Resources in the following order:

1. Schematic – These are the initial planning documents and design drawings which assist departments in the early stage of the project. The Schematic Design documents shall consist of System Narrative, including BDF/IDF information, campus connection points, drawings should include title Sheet, single line diagrams, site plan (may be part of electrical site plan). 2. Design Development -- As the architectural design process progresses,

overlays are developed to show the various structures and systems planned for the building. Design Development documents shall consist of outline specifications, in the CSI model. Drawings should include title Sheet, single lie diagram site plan, enlarged floor plans of BDF/IDF and Details. 3. Construction Documents -- These documents depict the final design

before bid submittal is undertaken. The Construction Documents shall consist of a completed Cabling Specifications and Drawing set. 4. Working Copy -- This is the Bid Copy.

5. “Record Document” Drawings – These drawings and documents represent the project as it is finally constructed and are deliverable prior to final inspection of the project

Note: Communications Resources comments and requests must be incorporated into the reviewed documents in full for the next review of

documents, or an explanation must be provided to Communications Resources, regarding the status of comments and requests. Communications Resources will postpone further reviews until all comments and requests have been addressed or incorporated into current documents and drawings.

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C. Architects, contractors, and telecommunications design professionals must indicate, on the design drawings, and in the design specifications, the locations and specifications of the physical infrastructure required for a complete

telecommunications cabling pathway and distribution system. This infrastructure shall include:

1. Network Access Module (NAM)

2. Cabling and wiring for a complete telecommunications system.

3. The infrastructure necessary to support the horizontal and riser cable plants

4. The telecommunications room/closet housing the intermediate distribution frame (IDF).

5. The telecommunications room housing the building distribution frame (BDF).

6. The infrastructure necessary to interconnect buildings including, conduit, manholes, pull boxes, building entrances, cables, splices, and connection to Communications Resources Service Points.

7. Earthing and bonding requirement and points.

8. Electrical service requirements and service points for ADFs, BDFs, and IDFs, as well as any necessary ancillary electrical work as part of the project.

9. During the planning, design and construction document phases of a project, the Supporting Standards for In Building Radio Communication System Amplification shall be planned and accounted for. Reference Appendix F.

III. The Telecommunications Distribution System Design Process for UC Davis

A. UC Davis’ telecommunications distribution system design process is broken down into five segments: Should the telephone switch or data equipment be listed?

1. The Horizontal Segment consists of the NAMs,cabling to the IDF and the associated pathways

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2. The Intermediate Distribution Frame contains the hardware for terminating the cabling from NAMs, electronic equipment, and riser cables.

3. The Riser Segment refers to the riser cable, and the sleeves, slots, and conduits that enable the cable to pass from floor to floor, BDF to IDF, IDF to IDF.

4. The Building Distribution Frame is the room that houses system common equipment and hardware for terminating the campus and riser cables. 5. The Campus Segment refers to the cabling and infrastructure that

interconnect buildings or systems on a campus.

6. The Network Equipment Design, Engineering and Installation. Typically this work is done by Communications Resources .

IV. Overview of this Manual

A. This manual is divided into five Segments with each Segment divided into six or more sections. Section 1 of each Segment is the Introduction to that segment. B. Sections 2 through 6 describe in greater detail the five segments of the

telecommunications distribution system. These sections describe “The Design Process”, the main topics and components that must be considered when planning and designing a particular segment of the system.

C. This manual also includes the following appendices:

1. Appendix A - Specifications, contains detailed technical specifications. 2. Appendix B - References, contains a list and brief description of the

industry standards and guidelines for telecommunications systems and how to obtain a copy of them.

3. Appendix C - Glossary, contains the definition of terms used in

telecommunications design, engineering, construction, and provisioning. 4. Appendix D - UC Davis Policy and Procedure Manual, Section 310-10. 5. Appendix E – NAM Matrices

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THE HORIZONTAL SEGMENT

I. The Design Process

A. The horizontal segment consists of two elements:

1. The horizontal cable and connecting hardware that provide the means for transporting the telecommunications signals between the network access module (NAM) in the work area and the horizontal cross-connect in the intermediate distribution frame (IDF).

2. The horizontal cabling pathways and spaces that distribute and support the horizontal cable and connecting hardware between the NAM and the IDF. Note: Cables that interconnect IDFs on the same floor, while physically horizontal in orientation, are considered part of the riser segment. B. This section describes the policies and procedures for the following design

activities:

1. Determining the type and number of outlets in the work area.

2. Identifying the types and lengths of cable used in the horizontal segment. 3. Determining termination hardware requirements at the outlet.

4. Designing the structures needed to support the horizontal cabling. 5. Assigning the NAM numbers to the appropriate locations.

6. Cable testing procedures. II. The Type and Number of Outlets

A. Work area outlets at UC Davis fall into three general configurations: basic, enhanced, and integrated.

1. The basic design supports voice or data applications. It consists of a single NAM supported by one 4-pair UTP Category 5e cable. A basic outlet may be used for a wall phone, a courtesy phone, a card reader, or to augment an existing work area with additional voice or data capacity.

2. The enhanced design supports voice and data applications. It consists of two NAMs per outlet. One 4-pair UTP Category 5e cable supports each NAM. The enhanced outlet is the most commonly used configuration at UC Davis.

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3. The integrated design supports complex systems including voice, data, and video applications. In general, it consists of three or more 4-pair UTP Category 5e cable supported NAMs per outlet. It may also consist of a combination of 4-pair UTP Category 5e cable supported NAMS with a 2-strand fiber optic cable supported NAM.

B. The features of these three designs may be combined in the most cost-effective manner with Communications Resources’ approval.

C. At least two enhanced outlets must be provided in each office and conference room.

D. Laboratories require additional outlets to support workstations and test equipment. E. A 4 × 4 × 2½ inch back box with a single gang plaster ring must be used at each

work area for NAM installations. From each backbox a minimum of ¾” conduit for basic and enhanced NAM, minimum 1” for integrated NAMs, will be run to the cable pathway support system. Conduit is to be sized appropriately for the fill of cable it is to accommodate.

III. Cable Types and Lengths

A. UC Davis recognizes two types of cables for use in the horizontal segment: UTP (unshielded twisted pair) cable and fiber optic cable.

1. UTP cable will be 4-pair, 24 AWG, solid conductor cabling that meets all the latest ANSI/TIA/EIA 568-A and TIA/EIA 568-A-1 Propagation and Delay Skew specifications for Category 5e cable, with all current Amendments and Bulletins, and must meet Anixter Level 6 (ALC-6) performance requirements.

2. Fiber optic cable will be a minimum of two strands, multi-mode, graded index, and tight-buffered cable.

a) Fiber optic cable will be constructed with an aramid yarn strength member around the fiber sub units.

b) . Core Diameter 62.5 (+-) 3.0 um

c) Cladding Diameter 125 (+-) 2.0 um

d) Numerical Apeture 0.275 (+_) 0.015

e) Core to Cladding Offset 3.0um

f) Core and Cladding Non-Circularity:

(1) Core: <6.0 Percent

(2) Cladding <2.0 percent

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h) Coating to be mechanically strippable, dual layered, UV-cured acrylate applied by the fiber manufacturer.

i) OVD Process 3. Performance: a) Bandwidth: (1) 850 nm >220 MHz at 1 km (2) 1300 nm > 600 MHz at 1 km b) Chromatic Dispersion:

(1) Minimum Zero Dispersion Wavelength 1332 nm

(2) Maximum Zero Disperson Wavelength: 1354 nm

(3) Maximum Zero Dispersion Slope: 0.098 ps/nm″.km

c) Attenuation:

(1) Max attenuation point discontinuity: <0.2 dB at any design wavelength.

(2) Bending Attenuation: induced @ 1550 nm, with 100 turns on 75mm diameter mandrel: <0.10dB.

d) Attenuation Difference: at 1380 nm, <attenuation at 1300 nm + 1 dB/km

e) Water Immersion:

(1) Induced attenuation, 23 degree C water immersion : <0.05 dB/km

4. Manufacturer:

a) Corning Cable Systems

b) Avaya Communication

c) Or equal.

B. All conductive cabling and associated components must comply with Article 800 of the NEC (1996). Furthermore, all fiber optic cabling must comply with Article 770 of the NEC (1996).

C. All cabling will be UL Listed Type CMP or OFNP if it is placed in air-handling plenums without conduit. The cable sheath will be marked with the UL listing. D. Horizontal cables will not be connected directly to telecommunications

equipment. Suitable connecting hardware (i.e. patch panels/cords and punch-down blocks) and equipment cables must be used to make the connection. E. Horizontal UTP cable and fiber optic cable will not be spliced.

F. The maximum lengths of horizontal distribution cables are shown in Table 2-1 (see Note).

Horizontal Cables Maximum

Length From the NAM to the horizontal cross-connect 295 feet Used for patch cords and cross-connect jumpers

in the horizontal cross-connect

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Table 2-1

Note: These limits apply to all types of horizontal cables. In establishing these limits, a 33-foot allowance was made for the combined length of patch cables and cables used to connect equipment in the work area and IDF.

G. Equipment cables attach directly to active equipment and must meet the same performance requirements as the patch cords. Patch cables and cross-connect jumpers must not attach directly to active equipment.

H. Cable slack must be provided at both ends of cable runs to accommodate future cabling system changes.

1. The minimum amount of slack must be 1 foot for UTP cables and 3 feet for fiber optic cables at the outlet. At the IDF, UTP horizontal cables are to meet manufactures procedures for slack, for patch panels, and 110 frames.

2. Service Loops placed during installation of 4-pair horizontal cable were tested and determined to cause Return Loss and NEXT problems on the order of 2-3dB. When creating service loops, they should be coiled in a Figure-eight configuration to eliminate this effect.

3. The fiber optic cable must have a 10-foot service loop at the IDF. 4. The slack must be included in all length calculations to ensure that the

horizontal cable does not exceed 295 feet. IV. Termination Hardware Requirements at the Outlet

A. Each UTP cable will be terminated at the outlet with an Ortronics GigaMo Solution: OR-60950011, OR-60950012 SERIES II, or OR-63750001

TRACJACK Module Information Outlet. (Face plates for the designated outlets must be from the same vendor.)

B. Each fiber optic cable will be terminated at the outlet using a SC-style duplex connector mounted in a modular-coupling mounting module.

Refer to Appendix A Specification 01 for details about NAMs.

V. Assigning the NAM numbers to the appropriate locations, and NAM Matrices.

The NAM matrices are used by Communications Resources department in the

application of operational databases, for assignment of services to departments, and for other service related purposes. They are crucial to the implementation of service to the project.

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A. Each NAM will be pre-assigned a NAM number by the Communications Consultant on the project drawings prior to bid.

B. NAM numbers shall be obtained by the Consultant from the UC Davis Line Assigner at 530-752-4598.

Note: All additional NAM numbers shall be obtained only from the UC Davis Line Assigner at 530-752-4598. NAM numbers shall not be duplicated.

C. After NAM numbers have been pre-assigned to the floor plans, the Consultant will complete the NAM matrices. Refer to Appendix A Specification 01 for information on NAM matrices. Nam matrices are to be completed at the beginning of

Construction Document preparation. A hardcopy of NAM matrices shall be provided to UCD Project Manager, and excel 2000 spreadsheet file to be provided to

Communications Resources.

D. The Consultant will ensure that specifications are placed in the contract documents that inform the Cabling Contractor regarding use of and maintenance of the NAM matrices for the project.

VI. Cross Connecting Voice NAMS.

A. The Project Consultant shall ensure that the Contractor provides a Voice NAM Matrix, identifying all cross connections from the NAM to the BDF.

B. The Voice NAM Matrix shall be provided to Communications Resources as part of the record drawing documentation.

C. The Voice NAM Matrix shall be provided prior to final inspection of the cabling work

VII. Structures to Support the Horizontal Cabling

A. Special attention must be given when selecting and designing the type and layout of structures to support the horizontal cabling. The design must accommodate cabling changes with a minimum of disruptions to occupants.

Note: UC Davis requires that the space above the ceiling grid be used, whenever possible, to route the horizontal cabling.

B. Listed below are the steps needed to complete this phase of the design process: 1. Obtain an accurate set of floor plans.

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3. Annotate, on the floor plan, the locations of the IDFs. If these locations have not been identified, please complete Section 3, The Intermediate Distribution Frame, before proceeding with this section.

4. Verify that the distance from each outlet to the horizontal cross-connect in the IDF does not exceed 295 feet. This distance must include the planned cable path as well as any vertical transitions.

Note: If there are horizontal cable lengths that exceed 295 feet, the IDF must be relocated to a more centralized location or another IDF must be added. Section 3, The Intermediate Distribution Frame, addresses how to locate and size the IDF.

5. Sketch the route of the conduit and the cable tray on the floor plan. Note: The preferred method of routing the horizontal cabling is to run

conduit from the outlet to a cable tray placed along natural building corridors. The cable tray then channels the cabling to the IDF. See Appendix A Specification 03 for conduit design considerations. a) A ¾-inch EMT conduit must be used from basic and enhanced

outlet boxes to the cable tray. A 1-inch, or larger if appropriate, EMT conduit must also be used if the bulk of the cables to be supported exceed the recommended 40% fill ratio.

b) A 1-inch, or larger, EMT conduit must be used from an integrated design outlet to the cable tray.

See Appendix A Specification 04 for details on horizontal conduit capacity.

c) All conduits will be firestopped in accordance with fire codes as interpreted by the State of California Fire Marshal.

d) Conduit will be installed with a pull string with a minimum test rating of 200 pounds.

e) The ends of conduits will be reamed and bushed to eliminate sharp edges that can damage cables during installation or service.

Refer to Appendix A Specification 05 for cable tray specifications. 6. Identify firewalls or fire rated barriers that will be breached during cable

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Note: All horizontal pathways that penetrate fire rated barriers must be firestopped in accordance with applicable fire codes. See Figure 2-1.

Approved fire stop bl

Fire rated b i Metallic

d it

Figure 2-1. Conduit must extend through the fire rated barrier when a fire rated barrier

exists between the outlet and the cable tray.

7. Identify hard ceilings or ceilings with restricted access that must be traversed during cable installation.

a) Multiple metallic conduits will be used in these areas.

b) Conduits will be of a size that will ensure that a 40% fill ratio is not exceeded.

Rigid conduit above hard ceilings

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Figure 2-2. Conduit placed above hard or limited access ceiling

c) The ends of the conduit will be bonded and earthed. Conduit will be earthed to MTGB. Refer to Figure 2-2.

d) Surface molding will be used to route cable from the work area outlet to the interstitial space in areas with limited ceiling access. 8. Identify outlets that will be located on walls that are not made of sheet

rock construction such as plaster walls, concrete block walls, exterior walls, and insulated walls. Written approval must be obtained from the Manager, Systems Engineering & Development, Communications Resources to use surface mounted outlets if these walls cannot be fished. Note: Exterior walls, while furred and covered with sheet rock, may not provide the necessary clearance between the sheet rock and the backing material (commonly concrete block) for standard outlets.

9. Identify the location of system furniture that will be cabled for

communications. System furniture can be fed from furred columns, wire whips from abutting walls, or power poles or under-floor systems. Note: The use of power poles will be minimized.

10. Minimum cable bend radii and conduit capacity must be considered when using a modular furniture system.

Refer to Specification 03 for cable bend radii restrictions and Specification 04 for details on conduit capacity.

11. Annotate on the floor plan the cable paths that will be supported with J-hooks.

Note: J-hooks will be placed at least every 4 feet to support the cable, and will be annotated on the construction drawings.

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VIII. Cable Testing Procedures

A. General

1. Test and report on each intermediate cabling segment separately, including Main Distribution Frame (MDF) to Building Distribution Frame (BDF), riser cabling, station cabling, horizontal distribution (each segment, if multiple) and telecommunications closet wiring.

2. Test each end-to-end cable link. B. Voice Cabling Plant.

1. The Contractor shall perform tests on the Voice Telephone Plant cable. The tests shall be performed end-to-end from each termination block on each pair. Provide machine-generated documentation of all test results on Contractor-provided, and University’s Representative-approved forms. This end-to-end test shall include the following:

a) DC Continuity

b) Reversals c) Shorts d) Opens

e) Overall loop resistance/cable length f) Attenuation

g) Splits

C. UTP Horizontal Cable Testing

1. UC Davis requires that all UTP cable pairs be tested with a Level II or Level III tester for full compliance with Category 5e specifications regardless of intended use.

2. Test results must be provided for all conductor pairs of each cable. 3. The test results must be provided on a 3.5-inch MS-DOS formatted

diskette in an MS Excel worksheet format.

4. EIA/TIA 568A Commercial Building Telecommunications Wiring specification must be used as a framework for testing UTP cable at UC Davis.

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Table 2-2 describes worst-case channel performance at 100 MHz as presented in SP-4195 (‘A-5). Parameter Category 5e Specified Frequency Range 1-100 MHz Attenuation 24.0 dB NEXT 30.1 dB

Power Sum NEXT 27.1 dB

ACR 6.1 dB

Power Sum ACR 3.1 dB

ELFEXT 17.4 dB Power Sum ELFEXT 14.4 dB Return Loss 10.0 dB Propagation Delay 548ns Delay Skew 50ns Table 2-2

Note: The Level II minimum limits for attenuation and NEXT accuracy are 1.0 dB and 1.6 dB respectively.

6. The overall (NEXT) or attenuation of a cabling run is a composite of the NEXT and attenuation of each of the components (UTP cable, NAM, patch panel, 110-block, patch cords, etc.) in that cable run.

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D. Fiber Testing

1. The horizontal fiber optic cable must be tested using a double-ended loss test. See Table 2-4 for proper fiber testing measures.

a) The horizontal cable must be tested in-line between two reference cables. One cable will be attached to the source and the other to the meter to measure the dB loss from both connectors, as well as any dB loss associated with the cable between the connectors. Note: Because of the relatively short cable lengths within the horizontal segment (less than 295 feet), the main loss will be connector loss.

b) The dB loss for a horizontal segment must not exceed 2.0 dB. c) TIA/EIA 526-14A outlines the steps required to test the horizontal

fiber optic cabling.

(1) Select two test jumpers. Ensure that the jumpers have a fiber core size of 62.5 µm and are connected with SC- style connectors (see Figure 2-3).

(2) Ensure that the optical source meter is stabilized and has a center wavelength within ± 20 nm of the multi-mode nominal wavelength.

(3) Ensure that the power meter and the light source are set to 850 nm if testing multi-mode fiber or 1310 if testing single mode fiber.

(4) Ensure that all SC connectors are clean.

Figure 2-3. SC- style connector.

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Note: A baseline must be established for the test jumper between the power meter and light source unit.

(6) Verify the second test jumper by adding this second jumper between the power meter and the original jumper.

Note: If the loss is greater than 0.5 dB, clean all connectors (except the connector inserted at the source) and test again. If the loss is still unacceptable, replace the second test jumper.

(7) Test the horizontal segment from each end of the fiber - from the NAM at the outlet and from the distribution cabinet in the communications room.

Note: Because the length of the fiber optic cable in the horizontal segment is less than 295 feet, the main loss will be connector loss.

(8) The total signal loss for a fiber link will not be greater than 2.0 dB - this includes connector loss and fiber loss.

(9) Once the test is successful, electronically capture the results or note the attenuation level.

Note: reversing the direction of test to see if the end connector is bad should isolate high loss, in a double-ended test.

Basic Guideline for Loss Measurements for Installed Fiber Optic Cables

Connector loss: 0.75 dB per mated pair

Fiber loss: Multi-mode: 2.5 dB/km @ 850 nm, 2.5 dB/km @ 1300 nm

Fiber loss: Single mode: 1.0 dB/km @ 1310 nm

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THE INTERMEDIATE DISTRIBUTION FRAME

A. The intermediate distribution frame (IDF) is the space where the horizontal cable is terminated on patch panels, 110-blocks, or connector panels, and

cross-connected to the riser cable.

B. The IDF supports the voice, data, and video needs of one floor of a building as opposed to an entire building or campus. It may also support other building information systems such CATV, alarms, security, audio,800mhz radio, other wireless systems and other telecommunications systems.

1. It is important to note that a BDF can be collocated with a IDF.

Additional space, racks, electrical and cable management are required to support the BDF.

II. The Size of the IDF

A. The size of the IDF depends on its function and the size of the usable floor space it serves. Usable floor space refers to the building areas used by the occupants in their normal daily work functions. The minimum IDF sizes shown are based on providing telecommunications service to one individual work area of 100 sq. ft. B. There must be at least one IDF per floor.

C. Multiple IDFs are required if the usable floor space to be served exceeds 10,000 square feet or the cable length between the work area outlet and the horizontal cross-connect in the IDF exceeds 295 feet. Minimum IDF sizes are shown in Table 3-1.

D. Additional floor space must be allocated if fire alarm panels and/or building monitoring equipment are located in the IDF.

E. Additional floor space must be allocated for additional applications, such as, Video Distribution cabling and equipment, etc.

Floor Area Served (Square Feet) Minimum IDF Room Size (Feet) 5,000 or less 10 × 8 5,000 to 8,000 10 × 9 8,000 to 10,000 10 × 11

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Table 3-1

Note: These wall lengths are the minimum acceptable. Shorter wall lengths will not allow space for equipment.

III. The Location of the IDF

A. Since the IDF is the focal point for many communications services, it must be designed as an integral part of the overall building.

B. The IDF must be located as close as possible to the center of, and on the same floor as, the work area it serves in order to minimize the horizontal cable lengths. .

C. Access to the IDF must be directly from hallways, not through classrooms, offices, or mechanical spaces.

D. The IDF must be located above any threat of flooding. All water pipes transiting the room(as well as the associated plumbing fixture) must be removed or

contained.

E. The IDF must not be located near power supply transformers, elevator or pump motors, generators, x-ray equipment, radio transmitters, or other potential sources of electromagnetic interference.

F. The IDF must not share space with electrical, janitorial, or storage facilities. G. IDFs must be stacked vertically in a multi-story building.

H. When controlled access to an IDF cannot be guaranteed, free standing or wall mounted lockable distribution cabinets will be used as the IDF.

See Appendix A, Specification 07 for details on these cabinets.

I. The locations of the IDFs must be submitted to the project manager for inclusion in the construction drawings, and they must be annotated on the floor plan. IV. Design Requirements

A. The major factors that must be considered when designing the IDF are as follows: 1. The minimum ceiling height must be 8 feet, 6 inches.

2. The doors must be a minimum of 3 feet wide and 6 feet, 8 inches tall. The doors must open outward and be lockable.

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3. The floor must be sealed concrete or tile to minimize dust and static electricity.

4. There must be continuous and dedicated environmental control (24 hours per day, 365 days per year).

a) Heating, ventilation, and air conditioning sensors and control equipment must maintain the room temperature between 64°F and 90°F.

b) The relative humidity must be 20% to 80%.

5. The IDF must not be equipped with a drop tile or other false ceiling. 6. The lighting in the IDF must provide a minimum equivalent of 50

foot-candles when measured 3 feet above the finished floor.

a) The light fixtures must be mounted a minimum of 8 feet, 6 inches above the finished floor.

b) The light switches must be located inside the room.

7. All walls must be lined with Trade Size ¾-inch AC-grade plywood, 8 feet high, as measured from finished floor.

Note: The plywood must be securely fastened to the wall-framing members, and painted with two coats of white fire-retardant paint.

8. The IDF must be equipped with:

a) A minimum of two dedicated 3-wire 120V AC quad electrical outlets on separate branch circuits and 20-ampere rated. See electrical requirement section for specific design information. b) Separate duplex 120V AC convenience outlets (for tools, test sets,

etc.) installed at least 18 inches above the finished floor at 6 foot intervals around perimeter walls.

c) Outlets on non-switched circuits and they must be identified and marked.

9. The IDF must be provided with an electrical ground on a 4-inch busbar as defined by NEC Article 250-71(b).

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a) The busbar must be mounted 6 feet, 6 inches above the finished floor if ladder racking is included in the design. If ladder racking is not part of the design, the busbar must be located near, but not behind, the riser sleeves between floors.

b) This grounding bar must be connected to a main building ground electrode, and it must be common to all IDFs. , reference

ANSI/EIA/TIA-607

10. The IDF must be dedicated to the telecommunications functions and related support facilities.

V. Termination Hardware Requirements in the IDF

A. The horizontal cabling in the horizontal segment must be terminated on patch panels for data cabling, 110 type wiring blocks for voice cabling, or fiber connector panels in the IDF.

1. UTP cables data NAMs must be terminated on 24- or 48-port High Density Category 5e patch panels which are mounted on a wall rack, in a free standing equipment rack, or in an enclosed data cabinet.

a) The patch panels must support RJ-45 modules wired to the TIA/EIA 568-A standard on the front, and have 110-style IDC connectors on the back.

b) The patch panels must be labeled above the RJ45 module as shown in Figure 3-1.

60125 60126 60127 60128 60129 60130 60131 60132 60133 60134 60135 60136 60137 60138 60139 60140 60141 60142 60143 60144 60145 60146 60147 60148

Figure 3-1. 24-port patch panel.

2. 110-type Wiring Blocks for Voice Cabling:

a) The connecting block hardware shall support the appropriate Category 5e Anixter Level 6 application, and facilitate

cross-connection and/or inter-cross-connection using either cross-connect wire or patch cords. Appropriately, the cross-connect hardware shall be 110-type.

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Can we suggest several manufactures such as Avaya and Ortronics here and eliminate the discription below.

b. The blocks shall:

(1) Be made of flame-retardant thermoplastic, with the base consisting of horizontal index strips for termination up to 25-pairs of conductors.

(2) Be available in 50-, 100-, and 300- pair sizes.

(3) Have detachable standoff legs available for the 50- and 100-pair bases, while not-detachable standoff legs are to be available for 300-pair bases.

(4) Contain access opening for rear to front cable routing to the point of termination.

(5) Have termination strips on the base to be notched and divided into 5-pair increments.

(6) Have clear label holders with the appropriate colored inserts available for the wiring blocks. The insert labels provided with the product shall contain vertical lines spaced on the basis of circuit size (1-, 3-, 4- or 5-pair) and shall not interfere with running, tracing or removing jumper wire/patch cords.

(7) Have bases available in 19-inch panels and high-density frame configurations for rack or wall mounting with cable management hardware.

(8) Have connecting blocks used for either the termination of cross-connect (jumper) wire or patch cords. The

connecting blocks shall be available in 2-, 3-, 4-, and 5-pair sizes. All connecting blocks shall have color-coded tip and ring designation markers and be single piece construction. (9) Have connecting blocks with a minimum of 200

re-terminations without signal degradation below standards compliance limit.

(10) Support wire sizes: Solid 22-26 AWG (0.64 mm – 0.40 mm).

c) Electrical Specification:

(1) Be ANSI/TIA/EIA-568-A AND ISO/IEC 11801 category 5e Anixter Level 6 compliant.

(2) The following requirements shall also be met.

Parameters Performance Performance @ 100 MHz *

NEXT + 2.5 dB 42.5 dB

NEXT (common mode) + 2.5 dB 42.5 dB **

Attenuation + 40% .24 dB

Return Loss + 6 dB 20 dB

LCL 40 dB (1-100 MHz) **

* Provided for information only, margin applicable to swept frequency range of 1-100 MHz. ** Not industry specified at this time

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(3) Meet TIA/EIA proposed category 5e electrical performance.

(4) Be UL LISTED 1863.

(5) Be made by an ISO 9001 Certified Manufacturer. 3. Fiber optic cables will be terminated on Connector panels in a fiber

distribution cabinet.

a) The Multimode connector must be preloaded panel with 568SC adapters with metal inserts. Color of connectors shall be beige. b) The singlemode connector panel must be preloaded with 568SC adapters with ceramic inserts. Color of connector shall be blue.

a) The fiber distribution cabinets must be configured with jumper troughs to aid in jumper management.

b) They must be wall mounted or rack mounted in either equipment racks or enclosed data cabinets.

Insert Fiber details: What type connector panels (high density etc.)?

B. Space for terminations of each type of cable must be located on one continuous wall or rack.

1. A clear space of 5 to 6 inches above and below the connecting hardware must be provided for cabling handling.

2. There must be additional backboard space for routing cables, patch cords, and/or cross-connect jumpers.

C. Cross-connect fields, patch panels, and active equipment in the IDF must be placed to allow cross-connections and interconnections via jumpers, patch cords, and equipment cables whose lengths per channel do not exceed:

1. 20 feet per patch cords or jumpers in the horizontal cross-connect. 2. 33 feet total for patch cords or jumpers and line cords used to connect to

the outlet.

VI. Structures to Support the Cabling in the IDF

A. Ladder racking, equipment racks, plywood backboards, data equipment cabinets, and wire management brackets must be used in the IDF to keep the cabling and

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equipment organized, and to allow the cable plant to be installed to UC Davis and EIA/TIA 569 specifications.

1. Ladder racking must be used to route bulk telecommunications cables within the IDF.

a) Ladder racking must be at least 12 inches wide and placed 7 feet above the finished floor to coincide with the top of the equipment racks and/or cabinets.

b) All ladder racking must be bonded and earthed to the busbar in the IDF.

2. Free Standing Equipment racks must be 19 inches wide by 84 inches tall, double sided with ANSI/EIA-310D spacing and 12-24 threads. Enclosed Cabinets are equipped with 10-32 threads see associated Specs for requirements.

a) A 3-foot working clearance must be maintained in the front and in the back of each equipment rack, and a 2-foot working clearance must be maintained at both ends of the equipment rack or multiple rack assemblies. This clearance must be measured from the

outermost surface of the equipment and connecting hardware rather than from the equipment rack since some of these devices may extend beyond the equipment rack.

b) The equipment racks must be braced to meet Zone 3 seismic requirements, and bonded and grounded to the ground point in the IDF unless the grounded ladder rack extends to the equipment rack.

3. Equipment and connecting hardware may be wall mounted using wood screws on rigid plywood backboard that is permanently attached to the wall and treated with a nonconductive, fire-resistant covering.

4. Fiber distribution cabinets will be used to mount terminated fiber in the IDF.

5. Wire management brackets must be used to manage cables and jumpers.

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Network Electronics

Fiber distribution cabinet is located at the top of the relay rack or cabinet with network electronics below

In smaller IDFs, fiber, UTP, and network electronics can be located in the same rack or cabinet

Use a 6"×84" vertical cable management bracket between racks

Figure 3-3. Equipment rack layout.

VII. Drawings for Construction/Project Managers

A. The following steps must be taken once the size, location, design requirements, termination hardware, and support structures for the cabling have been

determined for the IDF:

1. Notify the construction/project manager of the locations of the IDFs for inclusion in the construction drawings for University review of

appropriate schematic, design, or construction stage of documents. 2. Annotate on the floor plan the locations of the IDFs.

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3. Prepare sketches of each IDF. The following information must be included:

a) Overall room dimensions

b) Electric service convenience outlet locations c) 20 ampere electric service locations

d) Telecommunications grounding busbar (TGB) location e) Door openings - size, direction, location

f) Location and size of sleeves and/or slots, entrance conduit, cable tray entering room - include details of each

g) Location and height of lighting (insure that ladder racking will not block or otherwise interfere with the lighting)

h) Overhead cable ladder racking system within the room.

i) Equipment racks, enclosed electronic cabinets, wall mounted cross connect fields.

j) IDF terminal number, room number

See Figure 3-4 for an example of a typical IDF layout.

4. Provide sketches2 to the construction/project manager for dissemination to the other engineering disciplines involved in the design project. Provide AutoCad version 14 or greater in electronic format, and on D size drawing.

2_{Reference: UC Davis Campus Standards & Design Guide for drawing content pages, 29, 30 & 31 dated June}

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THE RISER SEGMENT

A. The riser segment consists of the riser cable and the supporting infrastructure within a building or cluster of buildings that connect the intermediate distribution frames (IDFs) and the building distribution frame (BDF).

B. The riser segment must be designed one segment at a time as illustrated in Figure 4-1, even though the riser cables may follow the same path.

Segment B

IDF 2.1 IDF 3.1

Segment A

BDF 1.1

Figure 4-1. Riser segment.

C. This section describes the policies and procedures for the following design activities:

1. The sizing of the riser cable.

2. Designing the structures to support a vertically aligned riser segment. 3. Designing the structures to support a horizontally offset riser segment.

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II. The Size of the Copper Riser Cable

A. The size of the riser cable is a function of the number of basic, enhanced, and integrated outlets supported by the IDF.

1. The minimum number of copper cable pairs required for each type of outlet is as follows: basic outlets = 1.5 pairs; enhanced outlets = 2 pairs, integrated outlets = 2.5 pairs

2. Commonly available cable sizes are 50, 100, 200, 300, 600, 900 and 1200 pairs.

Example: The riser cable for an IDF supporting 5 basic outlets, 50 enhanced outlets, and 4 integrated outlets would be sized as follows:

Basic outlets × 1.5 pair = 7.5 Enhanced outlets × 2 pairs = 100 Integrated outlets × 2.5 pairs = 8

Size of riser cable = 115.5 pairs

In this case, the riser cable would be 200 pairs, the next larger, commonly available copper cable, above 100 pair.

III. The Size of the Fiber Optic Riser Cable

A. The size of the fiber optic cable is a function of the number of data outlets served by the IDF.

Note: The minimum number of fiber strands for each type of IDF is shown in Table 4-1. Each IDF fiber cable shall be comprised of 50% multimode and 50% single mode fiber strands (example: 12 fiber cable with 6 multimode and 6 singlemode fiber strands)

Less than 24 data outlets 12 strands =

6sm + 6mm Less than 48 or more than 24 data outlets 24 strands =

12sm + 12mm Less than 96 but more than 48 data outlets 48 strands=

24sm + 24mm

More than 96 data outlets 60 strands=

30sm + 30 mm Table 4-1

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IV. Structures to Support Vertically Aligned IDFs

A. IDFs that are vertically aligned must be connected with sleeves or slots. A sleeve is a circular opening through the ceiling or floor of an IDF that allows the passage of cables and wires. A slot is similar to a sleeve except that it is a rectangular opening.

B. Sleeves and slots must be positioned near a wall on which the riser cables can be supported.

C. They must be located where pulling and termination will be easy, preferably on the left side of the IDF.

D. Sleeves and slots must not be placed directly above or below the wall space that is used for termination fields.

E. Sleeves and slots must conform to the National Electrical Code (NEC) and local fire codes.

F. Sleeves and slots must not be left open after cable installation and they must be properly firestopped at all times in accordance with applicable building codes. G. Sleeves must extend a maximum of 4 inches above the floor level. Slots must

have a 1-inch high curb. See Figure 4-1 for typical sleeve and slot dimensions. H. Rigid steel conduit (RSC) sleeves must be 4 inches in diameter unless a structural

engineer requires a smaller size or obstructions are present. They must be fitted with plastic bushings on both ends and equipped with pull strings.

I. All unused sleeves must be capped.

J. In a multi-story building, grip beckets must be specified to support the riser cable’s weight as it passes through the IDF.

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Figure 4-1. Proper sleeve and slot construction.

Table 4-1 lists the minimum number of 4-inch sleeves that must be used based on the total feet that the sleeves support.

Total Square Feet Quantity of Sleeves

Up to 50,000 3

50,000 to 100,000 4

100,000 to 300,000 5-8

300,000 to 500,000 9-12

Table 4-1

Table 4-2 lists the sizes of slots that are required based on the total square feet served by the slot.

Total Usable Area Served by Slot (Square Feet)

Size of Slot (Inches)

Up to 250,000 6 × 9

250,000 to 500,000 6 × 18

500,000 to 1,000,000 9 × 20

Table 4-2

Note: The number of sleeves and/or sizes of slots must be specified prior to construction because coring holes through concrete is expensive, it creates dust, and it may cause water damage or create structural hazards. An engineer registered in the State of California must approve all structural changes and floor penetrations.

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V. Structures to Support Horizontally Offset IDFs

A. IDFs that are not vertically aligned must be connected with cable trays or conduits.

B. Cable trays that are used to support horizontal cabling may be used to support riser cables provided the following conditions are met:

1. The cable trays’ carrying capacity can accommodate the riser cables. 2. The route of the cable trays can be used or modified to accommodate the

lateral run between the IDFs.

3. The riser cables conform to NEC Article 3(b)(1), NEC Article 800-3(b)(3), and comply with the State of California fire codes as interpreted by the State Fire Marshal’s department.

4. The riser cables are UL Listed Type CMP or OFNP if they are placed in air-handling plenums without conduit.

Refer to Appendix A Specification 05 for cable tray specifications.

C. Conduit will be used to route the riser cables between the IDFs if cable trays are not used to support the horizontal cabling. Conduit paths are tightly controlled pathways that must be coordinated with other trades during construction or remodeling.

1. The conduit will be rigid steel conduit (RSC), EMT, or intermediate metallic conduit (IMC), 4 inches in diameter.

See Appendix A Specification 08 for details on conduit fill for riser cables. 2. The conduit will be grounded at each end.

3. The conduit will be installed with a pull string and the ends will be bushed to protect the cable.

4. Conduits that enter the IDF must be placed near the corner and as close as possible to the wall where the backboard is mounted to allow for proper cable racking and to minimize the cable route inside the IDF.

5. Conduit located in the ceiling must protrude into the IDF 1 to 2 inches and above 7½ feet above the finished floor. Conduit will not turn down.

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Note: A 1-inch conduit must be dedicated from the IDF to a sealed junction box on the roof of the building for use as an antenna access point. This conduit must be grounded using a path other than the telecommunications ground provided in the IDF.

D. Listed below are the steps needed to plan conduit runs in the riser segment: 1. Identify on the floor plans the IDFs that will be supported using conduit. 2. Determine the number of conduits required. This number is the same as

the number of sleeves required if the IDFs had been vertically stacked. 3. Sketch the proposed route of the conduit on the floor plan.

4. Determine if any pull boxes are needed along the conduit run.

a) Pull boxes are required in sections of conduit that are 100 feet or more in length or that contain more than two 90° bends. Pull boxes must not be used in lieu of a bend.

b) Cables must feed straight through a pull box.

See Appendix A Specification 09 for details on installing and selecting the proper size of pull boxes.

5. Notify the project manager of the locations and sizes of the pull boxes for inclusion in the mechanical or electrical designs.

6. Annotate on the floor plan the locations and sizes of the pull boxes.

E. The riser cable is labeled based on a cable number assigned by Communications Resources. The cable pair numbers will also be included in the label.

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THE BUILDING DISTRIBUTION FRAME

B. The building distribution frame (BDF) is the room that houses the

telecommunications equipment that meets the voice, data, and video needs of an entire building. This equipment may include Private Branch Exchange (PBX), switching nodes, local area network hubs, and video distribution equipment, and/or network routers.

C. The BDF contains cross-connect facilities for terminating cables and for connecting the horizontal and riser segments to each other and to

telecommunications equipment. The BDF may also support other building information systems such CATV, alarms, security, audio, and other telecommunications systems.

1. It is important to note that an IDF can be collocated with a BDF.

Additional racks, electrical and cable management are required to support the IDF. The quantity of racks is dependant upon the quantity of NAMs that must be supported.

D. Whether this space is separated or combined with the building service entrance, it is, by almost every definition, a specialized area. This room will house sensitive electronic components that will generate heat 24 hours a day, 365 days a year and must be cooled to maintain operating performance.

E. The air handling system for equipment rooms must be designed to provide positive air flow and cooling even during times when the main building systems are shut down. This may require separate air handlers and/or small stand-alone cooling systems that are thermostatically controlled in this space. If this room is to be used as a Area Distribution Facility (ADF), the air handling system should be connected to the building’s backup power generation system.

II. The Size of the BDF

A. The size of the BDF depends upon the size and variety of the equipment to be installed and the size of the area that the room will serve.

1 The BDF must provide enough space for all planned equipment and cables, including any environmental control equipment, power

distribution/conditioners, and uninterrupted power supply systems that will be installed there.

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2. The BDF must also provide space for access to the equipment for

maintenance and administration, and for equipment changes with minimal disruptions.

B The minimum size of the BDF can be determined as follows:

1. In a BDF dedicated to Communications Resources (if the environment allows) open equipment racks a 19” x 84” rack will be utilized with 6” vertical cable management on each side. This equates to a 32” equipment bay. A minimum of three bays will be installed in any size building with the “x” wall a minimum of 10 feet.

2. A minimum of 2 feet shall be left at the end of the row of equipment bays. A minimum of 5 feet between walls and equipment bays will allow space for wall mounted copper cable terminations and the required 36” distance from equipment for work space.

3. In larger size buildings requiring additional rows of equipment bays, the bays shall be lined up in rows with 5 feet between the rows and walls. Use the formula below to determine the minimum square footage. The number of equipment bays required will determine the “x” dimension.

4. For one row of equipment bays hold the “x” dimension to 10 feet, for two rows of equipment bays hold the “x” dimension to 16 feet, and for three rows of equipment bays hold the “x” dimension to 22 feet.

III. The Location of the BDF

A. The BDF must be located as close as possible to the building entrance so that it is accessible for the delivery of large equipment.

B. The BDF must not be located in any place that may be subject to water or steam infiltration, humidity from nearby water or steam, heat, and any other corrosive atmospheric or environmental conditions.

C. The BDF must not be located near electrical power supply transformers, elevator or pump motors, generators, x-ray equipment, radio transmitters, radar

transmitters, induction heating devices, and other potential sources of electromagnetic interference.

F. The BDF must not share space in or be located near electrical closets, boiler rooms, washrooms, janitorial closets, and storage rooms.

G. The location of the BDF must be submitted to the project manager for inclusion in the construction drawings, and it must be annotated on the floor plan.

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IV. Design Requirements

A. The major factors that must be considered when designing the BDF are as follows:

1. The minimum ceiling height must be 8 feet, 6 inches.

2. Ceiling protrusions must be placed to assure a minimum clear height of 8 feet 6 inches to provide space over the equipment frames for cables and suspended racks.

3. The doors must be double doors that are 6 feet wide by 7 feet, 6 inches tall. The doors shall be keyed to campus standards for access by Communications Resources only. They must open outward and be lockable. Access shall allow for future equipment changes.

4. The floor must be sealed concrete or tile to minimize dust and static electricity.

5. There must be continuous and dedicated environmental control (24 hours per day, 365 days per year).

a) Heating, ventilation, and air conditioning sensors and control equipment related to the environment within the BDF must be located in the BDF .

b) The room temperature must be maintained between 64°F and 80°F. c) The relative humidity must be 30% to 55%.

d) Heat load is 5,000 BTUs per hour per electronic cabinet, equipment rack.

e) A positive air pressure differential must be maintained with respect to surrounding areas.

6. The lighting in the BDF must provide a minimum equivalent of 50 foot-candles when measured 3 feet above the finished floor.

a) The light fixtures must be mounted a minimum of 8 feet, 6 inches above the finished floor.

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c) Power for the lighting must not come from the same circuits as power for the telecommunications equipment.

7. All walls must be lined with Trade Size ¾-inch AC-grade plywood, 8 feet high.

a) The plywood must be securely fastened to the wall-framing

members, and painted with two coats of white fire-retardant paint. b) Plywood will be mounted vertically starting at 2 inches above the

finished floor.

8. The BDF must be equipped with a minimum of two dedicated 3-wire 120V AC quad electrical outlets on separate branch circuits and 20-ampere rated.

a) Outlets are to be located on active equipment racks 24” AFF. b) Provide duplex 20R spade receptacle.See electrical requirement

section for specific design information.

c) Separate duplex 120V AC convenience outlets (for tools, test sets, etc.) must also be installed at 18 inches above the finished floor at 6 foot intervals around perimeter walls.

d) The outlets must be on non-switched circuits and they must be identified and labeled.

9. The BDF must be provided with an electrical ground on a 4-inch or larger busbar as defined by NEC Article 250-71(b).

a) The busbar must be mounted 6 feet, 6 inches above the finished floor if ladder racking is included in the design. If ladder racking is not part of the design, the busbar must be located near, but not behind, the riser sleeves between floors.

b) This grounding bar must be connected to a main building ground electrode, reference ANSI/EIA/TIA-607.

10. Acoustic noise levels in the BDF must be maintained to a minimum by locating noise-generating equipment outside the BDF.

11. Additional equipment such as fire alarm panels and/or building monitoring devices must not be housed in the BDF. Separate space for these services can be provided as part of the electrical room or in a separate space. V. Termination Hardware Requirements in the BDF

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A. The BDF serves as the main cross-connect for riser cables and common

equipment circuits coming from the PBX, and riser cables extending to the IDFs. Campus cables and service provider cables are also cross-connected in the BDF. B. UC Davis has standardized on the 110-type blocks for voice cabling.

1. 110-type Wiring Blocks for Voice Cabling:

a) The connecting hardware block shall support the appropriate Category 5e Anixter Level 6 application, and facilitate cross-connection and/or inter-cross-connection using either cross-connect wire or patch cords. Appropriately, the cross-connect hardware shall be 110-type.

The blocks shall: