University of Nevada, Reno Campus Design & Construction Standards

Transcription

1 APPENDIX K ADDITIONAL COMMUNICATION / IT REQUIREMENTS THE FOLLOWING APPENDIX INCLUDES INFORMATION AND STANDARD DRAWINGS THAT ARE DIAGRAMMATIC AND ARE USED ONLY TO CONVEY INTENT. Page 1 of 18

2 A. UNIVERSITY OF NEVADA, RENO COMMUNICATIONS / IT BUILDING REQUIREMENTS General The intent of this document is to define requirements performed by construction trades to support IT cabling networks in new and renovated buildings. Ensure that computer networking is treated as an essential component of all new and renovated campus buildings. As such, networks should be designed and funded as part of the basic building infrastructure, just as electrical wiring and plumbing are presently funded. This will also ensure that all faculty, staff, and students in new or renovated buildings will receive readily accessible network connectivity. Ensure that all new or renovated campus computer networks can reliably communicate with all other networks in a manner that secures current and future ability to communicate with colleagues both on campus and beyond. When a department or building is involved in planning a network, renovating an existing network, building a new building, or renovating an existing space, University of Nevada, Reno Information Technology/Networking Department (Jerry Winter) must be contacted prior to the start of your project at: jdw@unr.edu. The IT staff will assist facilities or the architect to define the specific details of each project. The IT staff will also assist in ensuring that all appropriate network costs are included in your project budgets. Director of Information Technology or his designee, Jerry winter (jdw@unr.edu) must approve in advance all computer network designs and installations. All devices that connect to the UNR network must comply with network standards and not interfere with or impede the network transmissions of others. The contract drawings and specifications should cover all work enumerated under the respective headings. The contract drawings are diagrammatic only, as far as final location is concerned. Any item of work not clearly included, specified or shown, and any errors or conflict between contract drawings, specifications, codes and field conditions shall be clarified by a written request to the engineer prior to bidding. All campus computer networks that connect to or at some future date might be connected to the building-to-building backbone, must follow The University of Nevada Campus Telecommunications standards, and adhere to the following specifications. 1. When a department or building is involved in planning a network, renovating an existing network, building a new building, or renovating an existing space, the University Information Technology/Networking Department shall be contacted prior to the start of the project. The IT staff shall assist Facilities Services and/or the consultant with defining the details of each project. The IT staff shall assist in ensuring that all appropriate network costs are included in project budgets. Page 2 of 18

3 2. Information Technology shall approve in advance all computer network designs and installations. 3. All devices that connect to the University network shall comply with network standards and not interfere with or impede the network transmissions of others. 4. All campus computer networks that connect to, or may at some future date, be connected to the building-to-building backbone, must follow the University of Nevada Campus Telecommunications standards, and adhere to the following specifications. Codes and Standards The minimum standards for all electrical work shall be the 2011 revision of the NEC and the current revision(s) of EIA/TIA 568, 569, and 570. Whenever and wherever OSHA and/or federal, state, and/or local laws or regulations and/or design require higher standards than the NEC, then these laws and/or regulations and/or design shall be followed. Page 3 of 18

4 All work shall meet all applicable codes and standards, including but not limited to: National Fire Protective Assoc. (NFPA) 70. Building Industry Consulting Service International (BICSI) Standards National Electrical Manufacturers Assoc. (NEMA) Standards Electronics Industry Assoc./Telecom. Industry Assoc. (EIA/TIA) 568C University of Nevada System requirements. ANSI/TIA/EIA-568-C.1 and its addendum ANSI/TIA/EIA-569-A and its addendum ANSI/TIA/EIA-606-A ANSI/TIA/EIA-J-STD-607 ANSI/ICEA S ANSI/ICEA S ANSI/ICEA S ANSI/ICEA S ANSI/EIA/TIA-492AAAA ANSI/TIA/EIA-472CAAA ANSI/TIA/EIA-472DAAA ANSI/TIA/EIA-598 ANSI/TIA/EIA-455 ANSI/TIA/EIA-604 ISO/IEC nd edition CENELEC EN50173 IEC Networking must meet adopted campus standards and be included in the base construction budgets for all new and renovated campus buildings. Definitions During a building design phase, there are a number of communication infrastructure requirements that must be addressed by the architect. The following information is provided to address those architectural requirements and how they shall be incorporated in the final design. Telecommunications Spaces (TS) Telecommunications Spaces are special-purpose spaces that provide a secure operating environment for telecommunications and/or network equipment. Each type of space has a specific function and requires its own individual space within a facility. Depending on the building size, design and network requirements, one or more of these functions may be combined into one space. The industry term Telecommunications Spaces, when used, shall refer to Equipment and Telecommunications Rooms, as well as, ADF, BDF and IDF in this Telecommunications Standards document. Equipment Room (ER) The Equipment Room (ER) is the room within a building that houses the Area Distribution Frame (ADF) and Building Distribution Frame (BDF) for telecommunications equipment that Page 4 of 18

5 meets the voice, data, video, and wireless needs of an entire building, and/or a designated area on the UNR campus. In some cases, an ER may also contain the Entrance Facility (EF) and Intermediate Distribution Frame (IDF). An ER provides a controlled environment to house telecommunications equipment, termination hardware, splice closures, Main Telecommunications Grounding Bus Bar (MTGB) grounding and bonding facilities and protection apparatus where applicable. Digital Loop Carrier equipment, local area network switches, video distribution equipment, wireless network equipment, and large uninterruptible power sources are types of telecommunications equipment found in an ER. ER s are considered distinct from Telecommunications Rooms (TR) due to the nature and/or complexity of the equipment they contain. ER s shall be designed and provisioned according to the requirements in ANSI/TIA/EIA-569-B. The term ER, when used, refers to TR s, ADF, BDF and/or IDF s on the UNR campus. Telecommunications Room (TR) Telecommunications rooms (TRs) differ from equipment rooms (ERs) and entrance facilities (EFs) in that they are generally considered to be floor serving as opposed to building or campus serving. Every building is served by at least one TR or ER, with a minimum of one TR per floor. The TR is the room within a building that houses the Intermediate Distribution Frame (IDF) on the UNR campus for the primary function of providing a connection point between backbone and horizontal infrastructures. ANSI/TIA/EIA-568-B.1 has replaced the term Telecommunications Closet with the term Telecommunications Room. BDF may also be called a TR. The BDF is a building serving space providing a connection point between campus backbone cables and the building infrastructure system. The BDF may be floor serving when collocated with an IDF. Horizontal and backbone cable terminations shall be accomplished using manufactured patch panels and patch cords for data and jumper wire for voice circuits. On the UNR campus, the term IDF shall be used for termination points servicing work area outlet WAO locations. TR s shall be designed and provisioned according to the requirements in ANSI/TIA/EIA-569-B. The term TR s, when used, refers to TS s, BDF s and/or IDF s on the UNR campus. B. TELECOMMUNICATIONS SPACES MINIMUM REQUIREMENTS See drawing A3, A4 and A5: Telecommunications Spaces Minimum Page 4 of 18

6 Telecommunications rooms shall have only one lockable entrance door, 36 inches wide and 80 inches in height, without windows, that opens towards the outside of the room, and does not open into another room. Telecommunications rooms shall not be shared with other building services. Electrical distribution panels/transformers pose the threat of damage or EMI interference, heat or clearance problems. Storage areas present fire hazards as well as hindering access to equipment. These rooms shall be reserved for Data and Voice communications infrastructure and equipment only. No fire alarm, security, DVR s, or other electronic equipment not specifically required by network and voice infrastructure. Floors shall be concrete. Carpeted floors are not acceptable due to static discharge. Drop ceilings shall not be installed in telecommunications rooms and sheetrock shall be finish to below upper deck. All walls shall be covered with ¾ AC fire treated plywood from 8 inches above finished floor to 8 foot 8 inches above finished floor. These boards shall be painted, leaving stamp visible, to reduce dust and make cable runs visually discernible. Cable distribution in the BDF shall consist of cable ladders or raceways/trays above the main plywood wall and across the top of the racks. This cable system shall be at a height of 7 ft. 6in. from the floor and always below the finished ceiling so that entry into the finished ceiling is not required for intra-room cable runs. A minimum of 2, but ideally 4, #4-trade size conduits shall be installed to provide for cable pathways for riser and horizontal cabling to room. Cable tray or ladder for cable transport from 4-trade size feeds to equipment racks in room to be provided. Each row of racks shall be connected to a minimum of 18 inch wide cable ladder to run from wall to wall. Racks and ladder must meet seismic bracing requirement as specified by authority having jurisdiction. Maximum fill ratio of cable tray is 50 percent. 40% fill for conduits. Power The room shall have one dedicated 20-amp circuits with 20-amp duplex outlets installed every 6 feet at 6 inches above finished floor per wall. Two dedicated 20-amp circuit with 20-amp duplex outlets shall be located the top of each 7 foot equipment rack. Grounding: A grounding bus will be installed for grounding of the network/telecom equipment and to ensure that the ground voltage of the network matches that of the electrical system. All equipment racks and ladder shall be bonded as a system and grounded as per NEC. Environmental All BDF and IDF rooms shall have building air supplied 3 complete air changes per hour and a temperature between 64 to 75 degrees Fahrenheit measured 5 feet above the floor and relative humidity less than 80% non-condensing. Lighting Ensure that lighting fixtures are located a minimum of 8.5 feet above finished floor. Light switch without dimmer shall be located near entrances. Lighting levels shall be at least 50 foot candles at middle elevation of every equipment rack. Building Distribution Facility (BDF) Page 5 of 18

7 The building distribution facility (BDF) for New Construction shall be 10 x 15 foot minimum. All network inter-building connectivity must enter the building from two directions (to comply with failure safe divergent pathways), through 4 #4 trade size conduits and be terminated in a properly sized Building Distribution Facility (BDF). Every building, regardless of size, must be constructed to allow for a bundle of fiber optic cables (Minimum 72 strand Single mode) contained by its own Maxcell fabric innerduct. A spare 4 conduit for future growth will also be required as noted below under item D All conduit run bends must not exceed 180. These Conduits (8 in total) shall have a maximum of two 90 long sweep bends to the campus in underground plant. In each conduit include installation of 1800 lb. Mule Tape marked with footage. All underground conduits will have a conductor locator wire installed in each duct bank. A minimum of two groups of four #4 trade size conduits shall feed this BDF from diverse outdoor communications vaults for cable access. Outdoor vaults shall be no smaller than 4 foot x 8 foot. There should be 2 additional # 2 trade size conduits for smaller diameter wires. Each BDF shall be linked to two other UNR buildings using the above stated conduit requirements for diverse network routing. The vault locations for conduit connections and building locations for fiber connection shall be determined by consulting with the UNR Director of IT, or designated representative, Jerry Winter, at jdw@unr.edu. Intermediate Distribution Facility (IDF) Each floor of a building should have at least one secure IDF capable of housing and providing power for network interface equipment. Each IDF shall have a minimum of 2 walls of ¾ plywood mounting panel, one duplex power outlet, one overhead light and room for three floor standing 19 racks. HVAC supply adequate to provide 3 air changes per hour, open space to structure above or hard ceilings required. No drop ceilings. A minimum ceiling height of 8 ft. AFF. The number of work areas served shall determine the size of these rooms. As a general rule a 10 x 12 area is required. Design and placement of IDF, must be based on keeping cable runs to work areas under 295 ft. Preferably stacking these rooms on each floor, if possible. Horizontal and vertical riser conduits or cable trays must be available from each IDF to the BDF. Each IDF shall have a minimum of 2 #4 trade size conduits for cable access to horizontal cable path and vertical riser pathways. C. COMMON WORK RESULTS FOR COMMUNICATIONS Common Work Results for Communications Work Area Outlets (WAO) WAO density: 1. A minimum of one WAO location shall be installed per work area. For planning purposes, space allocated per work area averages 100-square feet. 2. For building areas where it is difficult to add additional WAO s at a later date (i.e. private office space), a minimum of two separate WAO locations shall be provided in the initial Page 6 of 18

8 design for that area, and they shall be located to offer maximum flexibility for change within the work area, (i.e. on opposing walls in private office space). 3. A minimum of one WAO shall be installed with a minimum of two data cables at the Fire Alarm Control Panel (FACP) located in the electrical or mechanical room. 4. A minimum of one WAO shall be installed with a minimum of one data cable for each elevator phone at the Elevator Control Panel. 5. A minimum of one WAO shall be installed with a minimum of one data cable at the Building Environmental Control Panel. 6. A minimum of one WAO shall be installed with a minimum of one data cable at the Security NVR/DVR location. 7. WAO locations shall be coordinated with the furniture layout. A power receptacle should be installed near each WAO location (i.e. within 3-feet). WAO locations are typically at the same height as the power receptacles. 8. Open office area interior design, telecommunications distribution planning, and power system distribution planning should be coordinated to avoid conflicting assignments for pathways or WAO locations, installation sequencing problems, and other difficulties. Courtesy, Pay, Text, Emergency and Wheel Chair Elevator Telephones In order to comply with the American Disabilities Act (ADA) Accessibility Guidelines: 1. The mounting height of the device box for Wall Mounted Telephones shall be 40-inches Above the Finished Floor (AFF). Wall-mounted telephones shall not be installed above a counter top. 2. The mounting height of the device box for a wheelchair accessible telephone (to include payphones and wheel chair elevator phones) shall be 40-inches AFF. Building Interfaces Furniture pathways are entered from building walls, columns, ceilings, or floors. The interface between the building and furniture requires careful planning and may require special products or furniture options. Safety, reliability, and aesthetic concerns all favor concealment of the building and furniture pathway interface. These pathway interfaces shall not trap access covers or otherwise block access to WAO s, building junction boxes or pathways. Pathways used to interconnect the furniture with building horizontal pathways shall be provided with a crosssectional area at least equal to the horizontal pathways cross-sectional area for the floor area being served. Walls and Columns Raceways shall be provided between furniture pathways and the inside of building walls or columns. Floors A raceway shall be provided between furniture pathways and horizontal floor pathway terminations (end of conduit, flush junction boxes, recessed junctions boxes, etc.). Alignment of furniture with building modules, duct locations and other cable delivery means should be considered as part of the layout planning. Furniture shall not be arranged such that pathway interfaces are in aisle spaces, where people walk or place their feet, or other places where such obstructions could create a hazard. Telecommunications consultant shall coordinate the furniture layout with the department. Page 7 of 18

9 Campus Environments Construction involving a new or existing building structure shall have an assessment of the outside conduit infrastructure, (i.e. connections between buildings) accomplished very early in the project cycle. This assessment is of particular importance if demolition of any structure is required as part of the overall project, and/or the new project may impact an existing conduit infrastructure. Tenant Improvement Project As part of the construction process for leased space, plans shall be made to remove any existing cable that may otherwise become abandoned. Abandoned cables, not identified and labeled for future use, increase the fire fuel load and shall be removed in accordance with the 2002 National Electrical Code. UNR IT shall be contacted and requested to survey the existing cable plant. There is a possibility that all or a portion of the existing installed cable may be reusable. Project Drawings Project drawings shall include the following site construction information: - Details of typical trench cross sections showing conduit locations in the trench, clearances from final grade, backfill materials and depths, pavement cutting information, and compacting requirements for both paved and unpaved areas. - Construction notes applicable to the work being performed. - A scale drawing showing location ties to existing structures, cable, conduit, MH/HH s, and any conflicting substructures. Profile drawings of congested areas where vertical and horizontal separation from other utilities is critical during cutting and placing operations. - A legend explaining industry standard drawing symbols of all relevant structures and work operations. - Conduit types, dimensions, and wall-to-wall measurements when used with MH/ HH, pedestals and Equipment and Telecommunications Rooms (ER/TR s). D. GROUNDING AND BONDING FOR COMMUNICATIONS SYSTEMS Grounding and Bonding for Communications Systems Bonding and sizing the telecommunications bonding backbone (TBB) The TBB shall be a copper conductor. The minimum TBB conductor size shall be a No. 6 AWG. The TBB should be sized at 2 kcmil per linear foot of conductor length up to a maximum size of 3/0 AWG. The TBB may be insulated. If the TBB is insulated, the insulation shall meet the fire ratings of its pathway. The sizing of the TBB is not intended to account for the reduction or control of electromagnetic interference. The TBB should be calculated for a size that conforms to the guidelines set by the NEC. Reference Table 1 Sizing of TBB. Table 1 Sizing of TBB. Sizing of the TBB Page 8 of 18

10 TBB length linear m (ft) TBB Size (AWG) less than 4 (13) (14 20) (21 26) (27 33) (34 41) (42 52) (53 66) 0 greater than 20 (66) 0 Bonding connections shall be made directly to the points being bonded, avoiding unnecessary connections or splices. All grounding and bonding connectors shall be listed by a nationally recognized testing laboratory (NRTL) as required by the NEC. The grounding or bonding conductor shall be connected to the grounding electrode by exothermic weld, listed lugs, listed pressure connectors, listed clamps, or other listed alternatives. Bonding Connections Typical connections are made using: - Bolts or crimps (e.g., connectors, clamps, or lugs) Where possible, irreversible compression-type connections and two-hole lugs should be used. Laboratory-tested hardware should always be used. - Exothermic welding A seamless molecular bond of metals is commonly applied to: - Connections to, and within, the ac grounding electrode system. - Locations requiring minimal maintenance. - Parts of grounding systems that are subject to corrosion or that must reliably carry high currents. - All connections that are buried. - Cable-to-lug connections. - Bonds to structural steel. All bonding connections should follow the manufacturer s guidelines. Figure 1 Small Systems (Single ER/TR within a building) Page 9 of 18

11 NOTE: Small system installations must meet ANSI J/STD-607-A. Large Systems (Multiple ER/TR within a Building) Multiple Bus Bars are used where multiple ERs, TRs, and EFs exist in large buildings. Guidelines for this method are detailed in ANSI J/STD-607-A; Each TMGB or TGB must have an effective bonding connection to the nearest approved building grounding electrode (e.g., structural steel) and the equipment grounding system (e.g., ac branch circuit panel board s equipment grounding Bus Bar). See Figure 2 Recommended Large System Arrangement. Page 10 of 18

12 Figure 2 Recommended Large System Arrangement (Multiple ER/TR within a Building) Page 11 of 18

13 Entrance Facility (EF) Telecommunications Main Grounding Bus bar (TMGB) Page 12 of 18

14 The TMGB serves as the dedicated extension of the building ac grounding electrode system for the telecommunications infrastructure. It serves as the central attachment point for the TBB and equipment. The TMGB must be a predrilled copper bus bar with holes for use with standardsized lugs, have minimum dimensions of 6.3 mm (0.25 in) thick by 101 mm (4 in) wide, and be minimum 20 (see Figure 3). Furthermore, it must be listed by an NRTL. Figure 3 Typical Telecommunications Main Grounding Bus bar (TMGB) It is recommended that the TMGB be located as near as possible to the cable EF to equalize surge currents due to lightning and other sources before they penetrate the infrastructure. Placement the bus bar in close proximity to the primary/secondary surge protection, cable sheaths, and entrance conduits. A BCT is intended to bond the TMGB to the ac grounding electrode system via the ac main service entrance panel board. However, unless this bonding connection is made within 9 m (30 ft), this connection should not be specified since the impedance of this conductor, due to its length, may limit its effectiveness. Equipment Room (ER)/ Telecommunications Room (TR) Telecommunications Grounding Bus bar (TGB) A TGB is the grounding connection point for telecommunications systems and equipment in the area served by an ER or TR. The TGB must be a predrilled copper Bus Bar with holes for use with standard-sized lugs, have minimum dimensions of 6.3 mm (0.25 in) thick by 51 mm (2 in) wide, and minimum length 10-inches (see Figure 4). It must also be listed by an NRTL. Page 13 of 18

15 Figure 4 Typical Telecommunications Grounding Bus bar (TGB) The TGB shall be bonded to the electrical panel serving the area where the TGB is installed, bonded to building steel and bonded in series to the main TMGB. The ac grounding panel board, known as a branch circuit panel board, may reside in the ER. The TGB should also be bonded to the nearest structural steel member, whether it is a horizontal or vertical beam, if available. Raised Floor Bonding and Grounding If a raised floor is present, then the raised floor bonding system shall meet the requirements of the most current Nevada Electric Code. One of the commonly overlooked grounding planes within an ER is a signal reference grid (SRG), often associated with raised flooring. An SRG may consist of copper straps taped to the concrete floor, a copper conductor alternately bonded to the different pedestals of the floor or it may be the floor itself with the stringers that support the tiles acting as the bonding conductor across the gradient of the floor. An SRG provides a low impedance path between many cabinets or racks of telecommunications equipment. Typical guidelines specify direct bonding to any conductive path that reaches the grid. A bonding conductor must be run between the room s associated grounding Bus Bar and to at least two points within the SRG if a raised floor is used within an ER, TR, or data processing center. This will ensure that an equipotential plane exists between the SRG and the grounding/ bonding infrastructure for the building. Isolated Ground (IG) Isolated ground (IG) is an equipment grounding topology that reduces the effects of EMI and RFI on the equipment grounding system. IG-type receptacles can be identified with a continuous orange receptacle coloring or a beige receptacle coloring marked with an orange triangle on the face. IMPORTANT: IG systems are not recommended for voice and data equipment, regardless of intent. Though such an equipment grounding system is permitted by the NEC (e.g., provided it meets stringent wiring requirements), the use of such a system defeats the purpose of an equipotential plane that is desired for all EFs, equipment rooms (ERs), and TRs. Field trials of Page 14 of 18

16 circuits that are constructed by the IG method indicate that using such a grounding system may actually expose equipment to more problems than could be encountered with a properly installed standard three-prong grounded receptacle. Labeling All ground attachments shall be properly tagged and labeled in accordance with TIA/EIA-606-A. Figure 5 TMGB/TGB Bus bar Labeling Testing Most qualified electrical installers do not test the grounding and bonding system for a building prior to its connection to the telecommunications grounding and bonding infrastructure. However, BICSI recommends that certain tests be performed to evaluate the bonding connection between the telecommunications bus bars and the ac grounding electrode system. This testing should be performed after the cabling and grounding infrastructure are installed but prior to either the final approval of the cabling plant or end-use equipment installation. As an alternative, the designer should specify that the TGB in each TR be bonded to the ac electrical panel board for that floor of the building with a supplemental bonding connection made to the metal frame of the building, where applicable. Each of the bonding connections should be tested to verify that a low resistance connection exists. Once one or both of these two connections are achieved, the need for the TBB is eliminated. The Telecommunications Ground & Bonding System shall be tested with a Earth Ground Resistance Tester used in the Two Point Test Method. The following will be needed to test the grounding and bonding. Contractor Shall supply testing equipment. - An Earth Ground Resistance Tester with the attachments foot reel of # 10 copper wire with ground clamps on both ends. Page 15 of 18

17 The following is the procedure to test the grounding & bonding: - All testing should be done with the entire building in operation. Nothing needs to be shut down to test the grounding and bonding with this tester. - Set up the meter in the two point test mode. - Zero the meter using the 500 foot number 10 copper test lead. - Connect the short test lead from the meter to the close end of the wire/cable under test. - Connect the end of the 500 foot lead to the other end of the wire/cable under test. - Take the reading of the wire/cable under test. - If the ohm value is less than 0.1 Ohm between the two test points the bonding is adequate. Tests to be conducted: - The installer / technician conducting these tests must be certified level VI by UIC ACCC TED. - Test between the TMGB and the service equipment (power) ground. - Test between the TMGB and each TGB in the system. - Test between the TGB and: o Data racks. o Cable tray. o Telecommunication conduit. o Caging. o Electronic equipment. These tests shall be conducted with the systems in operation. These tests shall be recorded on sheets provided for this purpose by UNR. E. CABLE TRAY FOR COMMUNICATIONS SYSTEMS Cable Tray for Communications Systems The use of a wire basket tray system is the preferred method of cable tray systems within the corridors. A minimum of 12-inches of clearance shall be provided above the cable tray and a minimum clearance of 12 to 18-inches on at least one side shall be provided for access to tray. Please refrain from specifying Two Side Rail (Metallic) Cable Tray Systems due to the limited amount of space in the ceiling areas. Minimum size is 12 wide x 4 high. Specify larger size to maintain 50% fill ratio. Cablofil Basket Tray or equal F. CONDUITS AND BACK BOXES FOR COMMUNICATIONS SYSTEMS Conduits and Back Boxes for Communications Systems Each habitable space must be connected individually to the cable tray with two locations, at least one 1 conduit for Cat 6 projects and 1 ¼ for Cat 6A projects. In labs, or other multi-drop locations, each RJ-45 computer drop will have its own 1 or 1 ¼" conduit. Page 16 of 18

18 In general, conduit shall be zinc-coated, rigid steel conduit and shall meet in all respects, the UL Standards for Rigid Steel Conduit. The conduit shall be metalized, galvanized, or approved equal. Electrical metallic tubing may be used in all locations unless otherwise noted. Electrical metal tubing shall be terminated with connectors with insulated throat. Metal lined terminating fittings will not be acceptable. All terminating fittings shall be secured to box or cabinet with double lock-nut type of construction. Couplings and connectors for electrical metallic tubing shall be steel and shall be of the compression type. Set screw and indentation type connectors will not be acceptable, except that approved type steel set screw connectors may be used on EMT 2-1/2 or larger. LB-type fittings are not permitted with communications cabling. Runs of conduit or tubing shall have supports spaced in accordance with the NEC, and exposed conduit shall be installed with runs parallel or perpendicular to walls, structural members or intersections of vertical planes and ceilings, with right angle turns consisting of cast metal fittings or symmetrical bends. Bends or offsets shall be avoided where possible but where necessary shall be made with an approved conduit-bending machine. Conduit or tubing, which has been crushed or deformed in any way, shall not be installed. Expansion fittings or other approved devices shall be used to provide for expansion or contraction where conduit or tubing crosses expansion joints. Conduit and tubing shall be supported on an approved type of ceiling trapeze, beam clamps, strap hangers, or pipe straps, secured by means of toggle bolts on hollow masonry units, expansion shields in concrete or brick and machine screws on metal surfaces. The use of tie wire for suspending conduits or securing it to joists, purlins, beams, etc. will not be allowed. Conduit and tubing shall be installed in such a manner as to insure against trouble from the collection of trapped condensation, and all runs shall be arranged so as to be devoid of traps wherever possible. All necessary precautions to prevent the lodgment of dirt, plaster, or trash in conduit or tubing, fittings and boxes during construction shall be taken. A run of conduit or tubing, which has become clogged, shall be entirely freed of these accumulations or shall be replaced. Conduit shall be securely fastened to all sheet metal outlets, junction and pull boxes with double-galvanized lock nuts and insulating bushings. All conduits shall be installed concealed unless otherwise noted or shown on the drawings. No conduit smaller than 1 shall be used. No flexible conduit shall be used unless specifically approved by the Engineer. Junction Boxes No conduit run shall be more than 100 feet between access points. No conduit shall contain more than two 90 degree sweep bends between junction boxes. Junction boxes shall be no less than 18 x 18 x 12. All junction boxes used under this contract shall be constructed of code gauge, galvanized steel and shall be as manufactured by Steel City, Appleton, O0Z/Gedney, RACO, Killark, or approved equal. Cable Routing The following is a chart of minimum distances that UTP must be run from common sources of EMI (Electromagnetic interference): Page 17 of 18

19 EMI Source Fluorescent Lighting Neon Lighting Unshielded power cable 2 KVA or less Unshielded power cable over 2 KVA Transformers and Motors Minimum Distance 12 inches 12 inches 5 inches 39 inches 39 inches Whenever possible, avoid running UTP in locations where temperature will be below 40 degrees Fahrenheit or above 115 degrees Fahrenheit. Humidity should normally be in the range of 8-80%. All cable, conduit, and Wiremold (TM) routings shall utilize the path of least obstructions and shall be run parallel or perpendicular to existing walls. Hang multiple horizontal conduits in tight, vertically organized arrays and run vertical riser similarly. Avoid creating obstructions to future mechanical/electrical work. All interior conduits required under this contract shall be provided with a non-conductive, fish tape, or approved nylon pull string. Fire Rated Penetrations Wherever conduit(s) pass through floor slabs in other than slab on grade construction, steel sleeves shall be provided for each conduit. Sleeves shall project 6 above and below slab and spaces between conduit and sleeves shall be fire stopped with material, which will provide a fire rating substantially the same as the un-pierced floor. Penetrations through walls and ceilings, chases, shafts, or other architectural assemblies, for the passage of cable shall utilize STI EZPath or Ready Sleeve fire rated assemblies. The fire stop systems and products shall have been tested in accordance with the procedures of U.L and material shall be U.L. classified as material for use in through penetration fire stops. Provide through penetration fire stopping systems to prevent the spread of fire through openings made in fire rated walls or floors to accommodate penetrating items such as conduit, cables and cable tray. Fire stop shall restore the floor and wall to the original fire integrity and shall be waterproof. The fire stop system shall comply with the NEC and NFPA 101- life safety code (latest edition) and shall be made available for inspection by local inspection authorities prior to cable system acceptance. The contractor shall be responsible for verifying the fire rating of all walls and floors having cabling penetration. When applicable, coordinate sealant installation with other trades and with general contractor on site. End of Additional Communication / IT Page 18 of 18