Construction Services. Building Strategy. Standards for Wiring Telecommunications Networks in Cornwall Council Buildings. Version 4.

Transcription

1 Construction Services Building Strategy Standards for Wiring Telecommunications Networks in Cornwall Council Buildings Version 4.2 April 12 th 2012 Environment

2 Building Strategy Standards for Wiring Telecommunications Contents 1 Introduction 3 2 Horizontal distribution cabling Specification and standards Density of outlet distribution Outlet location and cable containment Service to desks Testing of UTP cabling 5 3 Telephone distribution cabling General principles Specification and standards Testing of telephone cabling 6 4 Network wiring centres Location Patch frames Patch cables 8 5 Backbone cabling Fibre optic backbone Mechanical Performance Optical Specifications Fibre Optic Connectors Fibre Optic Patch Cords Compliance with international standards Testing Telephone backbone General principles Specifications and standards Testing 11 6 Implementation 11 7 Warranty 12 8 Documentation and labelling Labelling Documentation 13 9 Acceptance 13 Version 4.2 2

3 1.0 Introduction This document outlines the standards to which telecommunications cabling must conform for any new works, additions to existing installations and repairs. Standards for electrical installation are documented elsewhere. Where a supplier wishes to respond to both the telecommunications and electrical elements of a given tender both standards will apply. New cabling installations will be expected to support the following applications: Ethernet local area networks at 10Mbps, 100Mbps and 1000Mbps. Data Centre local area networks at 10Gbps Power over Ethernet PABX analogue extensions. PABX digital extensions. ISDN2 circuits. PTO analogue circuits. Video baseband and RGB RS232 at up to 19.2Kbps. For each installation a Schedule will be supplied which will document the detail of the requirement together with any variations to this specification. As well as complete installations suppliers may be invited to provide a terminate and test service in relation to cables run in by others. The following conditions will apply in all cases: A documented network design including outlet quantity and layout must be agreed with the Council s Project Manager before work commences. Acceptance testing will be required to confirm that the installed system meets the defined specifications and standards. All cabling work will be fully documented. In addition, unless otherwise agreed or specified in the Schedule: Wiring to final outlet destination points in new office installations will be via 4-pair Category 5e UTP cables. Wiring to final outlet destination points in new data centre installations will be via 4-pair Category 6a Shielded UTP cables. Wiring to final outlet destination points in existing installations will be via 4-pair Category 5e or Category 6a cables to match the existing. Links between wiring closets and campus buildings will be via fibreoptic cables (50/125 OM3 Multimode) Voice connections between wiring closets and exchanges will be via copper pair cables. Additions to existing installations will use components from the same manufacturer. New data centre installations will use components from the same manufacturer. All cables, trunking and other components will be constructed of low smoke, zero halogen (LS0H) / low smoke and fumes (LSF) materials. Version 4.2 3

4 2.0 Horizontal distribution cabling 2.1 Specification and standards The cable and component quality and the installation and termination techniques must, as a minimum, comply with all relevant parts of EN50173 and EN50174; Cat 5 enhanced / Cat 6a standards, to support application class D. The cable is to be unshielded four twisted pair, with nominal impedance 100. Outlets will conform to EN (eight position modular connector) and be capable of receiving 24 AWG solid and stranded wires terminated by insulation displacement methods. Termination is to be to the T568B standard. The following installation standards will apply: The length of each horizontal cable from patch panel to telecommunications outlet is not to exceed 90 metres Maximum bending radius during installation of 75mm Maximum final bending radius of 25mm Maximum pulling load of 38 kg/m Cables to be secured at both ends using the fixings provided Cable ties are not to be over-tightened to a point where they cause strain on the cable sheathing Segregation from power of 150mm unless contained in purposedesigned multi-compartment trunking, in which case the length of the parallel run should be kept to a minimum 2.2 Density of outlet distribution Unless otherwise specified in the Schedule, the density of outlets will be based on floor area and will be as follows, where the term outlet should be taken to mean a single RJ45 point. The outlets will be evenly distributed around the area. For a data-only installation in a normal work area the minimum density is to be 2 outlets (1 double outlet) for every 9 sq m. For a voice and data installation in a normal work area the minimum density is to be 4 outlets (2 double outlets) for every 9 sq m. For installations in classrooms the minimum density is to be 4 outlets (2 double outlets) for every 9 sq m. For other locations such as computer rooms and meeting rooms the density may be higher or lower than normal and will be specified in the Schedule. 5.3 Outlet location and cable containment In all cases, double outlets will be mounted on single gang faceplates and quad outlets will be mounted on double faceplates. All containment will be surface-mounted unless otherwise stated. Perimeter trunking at dado rail height is the preferred method of containment in areas of normal outlet density. Where possible, the bottom of the trunking should be at least 25 mm above normal desk height. Trunking at skirting level should be used only where dado trunking is impracticable. Existing trunking Version 4.2 4

5 should be used where feasible in which case the supplier will be responsible for fitting suitable back-boxes. Individual wall-mounted back-boxes should be used in areas of low outlet density. Outlets will not be mounted on moveable partition walls unless an adequate distribution cannot otherwise be achieved; in such circumstances the preferred solution is to install the horizontal termination in the ceiling space above. Where the smaller dimension of a room exceeds 8m, provision will be made for locating outlets remotely from the walls using purpose-made poles or floor-boxes. Installation practice is to ensure that the cable is not subjected to excessive lateral or longitudinal strain in installation and that support by tie wrap of cable bundles is provided at 0.5m intervals on vertical runs and 1.5m intervals on horizontal runs. Minimum bending radii of 20 times cable diameter during installation and 10 times diameter after installation will be maintained at all times. Cable pair twist must be maintained during stripping and termination. Where main cable runs are located above suspended ceilings or below floors, basket or tray fixed to the building structure will be used. This will also apply to cable run between building floor levels. Under floor installations in particular must be adequately protected from attack by vermin. Baskets / trays should not be more than 60% full in a new installation. Under no circumstances will cables be loose-laid. 5.4 Service to desks The supplier may be required to provide the service to the desks in which case the following will apply: Extension from horizontal outlet to user workplace will normally be by drop leads direct to the desk, terminated at each end in RJ45 plugs. These cables will be factory made and conform to the cable and connector specifications required to meet EN50173 enhanced application class D standards. The cable feed into the desk should be installed through appropriate desk cable management. Where cable management does not exist, cable ties, trunking, etc. must be used to secure cables appropriately. Approximately one metre free tail should be left for equipment connection, and the remainder neatly contained within the desk. 5.5 Testing of UTP cabling Unless otherwise specified in the Schedule, 100% of the installed UTP cables will be tested in accordance with the latest draft of EIA/TIA TSB67. The tests are to include: Length Wire map Attenuation NEXT ELFEXT ACR Return loss Propagation delay Delay skew Version 4.2 5

6 NEXT, ELFEXT and ACR should ideally be tested under power sum conditions. Details of the test equipment to be used and documentary evidence of regular calibration will be required. 3.0 Telephone distribution cabling 3.1 General principles Three types of telephony service may be encountered: IP Telephony as part of a structured cabling system PBX-based with separate distribution using voice-grade cable PBX-based as part of a structured cabling system IP Telephony requires only compatibility with Power over Ethernet. Separate distribution using voice-grade cable will follow the standards set out in Section 5.2. The remainder of this section applies where PBX-based telephony is used as part of a structured cabling system. The precise wiring configuration will be specified in the Schedule. The telephone system supplier will terminate the extension wiring on a Test Jack Frame (TJF). The wiring contractor will terminate the distribution wiring on an adjacent Main Distribution Frame (MDF) which will, in turn, be connected by multi-pair voice-grade cable to voice patch panels in the main (or only) wiring centre. Where there is more than one wiring centre the distribution will be in accordance with Paragraph An additional provision of 20% beyond that which is currently required should be made to allow future phone provision to be satisfied through patching rather than physical rewiring. Distribution frames and boxes should not be mounted at floor or ceiling level or behind furniture or cabinets. 3.2 Specification and standards Unless otherwise specified, two pairs will be connected to each voice patch panel outlet; pair 1 will be connected to RJ45 pins 4&5 and pair 2 will be connected to pins 3&6. The MDF must be connected by a dedicated 6mm 2 cable to a clean earth point in accordance with BS7671. All voice cabling is to comply with BS6701. copper cable within buildings is to conform to the BT CW1308 specification and will be terminated on punch-down strips type 237A. The frames onto which the wires are connected will be clearly labelled in ascending numerical order, allowing for each connected circuit to be documented with a frame, row, and location detail, e.g. 1A-39-6 will relate to a circuit connected to frame 1A, row 39, location 6. The following jumper wire colours will be used with punch-down strips: Green/yellow ISDN connections Blue/yellow wire Analogue connections Red/white Digital connections At no point should jumper wires be pulled tight or bend more than 90 o. 3.3 Testing of telephone cabling Unless otherwise specified in the Schedule, 100% of the installed cabling will be tested for: Version 4.2 6

7 Continuity Attenuation Insulation Wire map 4.0 Network wiring centres 4.1 Location Suitable locations for wiring centres must be agreed in advance and will be specified in the Schedule. Office areas, kitchens and any areas subject to excessive dust, damp or temperature extremes should not to be used. 4.2 Patch frames The Schedule will specify whether patch panels are to be installed in an open frame or an enclosed cabinet. Enclosed cabinets should have a toughened glass or acrylic lockable front door and removable steel sides via internal release. Floor-standing cabinets should have a lockable steel back door. If the cabinet is not fully enclosed it should be located in a secure room for security purposes. The cabinet or frame must be equipped with effective vertical and horizontal cable management. The frame is to be a minimum of 700mm wide and a minimum depth of 600mm to permit tidy vertical routing of patch cords and installation of PoE switches. Where servers (including VoIP controllers) are to be accommodated the minimum depth is to be 1000mm. The Schedule will specify if the density of the patch ports is 24 ports per row with horizontal cable management included every two rows, or 48 ports per row with horizontal cable management included every other row. To facilitate cable tracing vertical cable management must take the form of bars or loops rather than plates with holes. Unless otherwise specified, the standard configuration for wiring frames should be as shown in the diagram below. Fibre Cable connections are to be terminated at the top of the frame with copper voice ports underneath. Unless specified in the schedule the voice ports are to only take up 1U in space. The total space occupied by the outlet patch must not exceed 75% of the frame capacity. To meet this condition in large installations multiple identical frames should be combined with clear access between. Cabinets and frames up to 22u in height are to be equipped with a power strip with a minimum of six 13A sockets. Larger cabinets and frames are to be equipped with a minimum of 12 sockets. Sockets should be off-set from the centre line and / or spaced so as to permit the use of typical lowvoltage power supply units. If specified in the Schedule a rack-mounted UPS is to be supplied and installed as shown in the diagram and the power strip connected to its output. The mains supply to the cabinet or frame is to be taken from a switched / fused spur fed from a clean radial circuit and labelled with the distribution board reference. In addition the frame must be connected to a clean earth source in accordance with current IEE wiring regulations BS7671. Version 4.2 7

8 Horizontal cable management to be fitted every 2U if using 24 ports, or every 1U if using 48 ports. 4.3 Patch cables Patch cables will be factory made and conform to the cable and connector specifications required to meet EN50173 enhanced application class D standards. The following coloured cables will be used to signify the type of connection: GREY Non-critical data RED Critical voice or data BLUE Non-critical voice GREEN Cross-over between active devices BLACK DMZ / restricted access MAROON ISDN or BT Direct dial (ISDN lines have yellow tag on end). YELLOW Test environments ORANGE Public / shared networks BROWN Uncontrolled / untrusted networks PINK Server management (including ILO) Patch cables must be of appropriate length and routed tidily using horizontal and vertical cable management. Version 4.2 8

9 5.0 Backbone cabling 5.1 Fibre optic backbone Unless otherwise specified in the Schedule, new optical fibre cable shall consist of multimode graded-index 50/125 m (minimum OM3 standard) the following specifications: Mechanical Performance Cable minimum bend radius: 20 times cable diameter during installation and 10 times cable diameter after installation. Buffered fibre minimum bend radius: 19 mm Operating temperature range: -10 to +50 degrees C Storage temperature range: -40 to +70 degrees C Optical Specifications Maximum fibre loss shall meet or exceed the following specifications: 3.0 db/km at 850 nm 1.0 db/km at 1300 nm Minimum bandwidth shall meet or exceed the following specifications: 400 MHz-km at 850 nm 600 MHz-km at 1300 nm Numerical aperture : Fibre Optic Connectors SC style connectors shall be used which meet or exceed the following specifications: Operating temperature: -10 to +75 degrees C Average loss: 0.3 db Extensions or modifications to existing 62.5/125µ cables should use ST style connectors Fibre Optic Patch Cords Fibre patch cords for new installations shall consist of duplex, buffered, graded-index 50/125 µm (minimum OM3 standard) fibres. Unless otherwise specified, fibre patch cords shall be terminated at both ends with dual SC connectors. The fibre patch cords are to meet the following specifications: minimum bend radius: 30mm operating temperature: -10 to +70 degrees C loss: 0.4 db per mated connector minimum bandwidth at 850nm: 400 MHz-km minimum bandwidth at 1300nm: 600 MHz-km 62.5/125µm patch cords with ST style connectors may be specified for extensions or modifications to existing installations Compliance with international standards Fibre-optic cabling will conform to BS7718. Multi Mode Fibre Minimum OM3 (ISO11801) Version 4.2 9

10 5.1.6 Testing 100% of the installed fibre-optic cables will be tested after termination at both ends. The tests will comprise a simple measurement of power loss, and an OTDR test at 850nm and 1300nm wavelengths to demonstrate that the installed cable meets the parameters specified in paragraph Telephony backbone General principles This section applies where PBX-based telephony is used as part of a structured cabling system. No installation should be carried out using voice grade cable. Where multiple wiring centres are to be used the preferred solution is to employ a main voice patch panel and one or more subsidiary voice patch panels in the main wiring centre as shown in Diagram 5.2.1(a) below. The MDF is to be connected to the main patch panel and each of the remote wiring centres is to be connected to a subsidiary patch panel. Crossconnection between the main and subsidiary patch panels is made using UTP patch leads. Wiring Centre 2 TJF MDF Main Wiring Centre Cat5 Patch Subsidiary Voice Patch Main Voice Patch a Wiring Centre 3 PBX 5.2.1(a) - Preferred distribution Alternatively, a multi-pair cable from the MDF may be terminated on a distribution point (DP) in each remote wiring centre as shown in Diagram 5.2.1(b) below. The DP (consisting of punch down strips type 237A mounted in a suitable box) will then be connected to the voice patch panel. The multi-pair cable terminations at the MDF should be clearly labelled. The label should indicate the wiring centre names and the individual voice port numbers. Version

11 Wiring Centre 1 DP TJF MDF a DP Wiring Centre 2 PBX 5.2.1(b) - Alternative distribution Specifications and standards All voice cabling is to comply with BS6701. copper cable within buildings is to conform to the BT CW1308 specification. Where copper cable is run between buildings, either outdoor grade cable to CW1128 specification or indoor / outdoor cable to CW1308B specification will be used. Outdoor cable should be terminated within 1m of the entry point into the building and extended using indoor cable. Cables will be terminated at Distribution Points (DPs) consisting of punch-down strips type 237A mounted in suitable boxes. Where specified in the Schedule surge arrestors are to be fitted at the ends of outdoor cables. These should be Oneac Line Analogue Protectors from Chloride Power, order code US10AP200 or US10AP1. The strips onto which the wires are connected will be clearly labelled in ascending numerical order, allowing for each connected circuit to be documented with a frame, row, and location detail, e.g. 1A-39-6 will relate to a circuit connected to frame 1A, row 39, location Testing Unless otherwise specified in the Schedule, 100% of the installed cabling will be tested for: Continuity Attenuation Insulation Wire map 6.0 Implementation The timetable for installation will be as defined in the schedule, where any interface with other contractors, particularly with regard to provision of Version

12 containment and power, will also be noted. The supplier must nominate a project manager who will be responsible for all aspects of the installation and for liaison with the Council s representatives including site visits. Sound working practice must be employed throughout. The supplier is responsible for drilling any necessary holes and attaching fittings and equipment to buildings. Every reasonable precaution must be taken in order not to cause damage or compromise the structural integrity. Where appropriate the council s project manager should be consulted. The council s Project Manager is responsible for ensuring the building the work is due to take place in has a full and valid type 2 asbestos report. This report needs to include all areas of the building that work is to take place including wall cavities, attic spaces and otherwise unused areas of the building not just the office space. If this report is not available then work will have to be rescheduled until a new asbestos survey is carried out by EP&E Labs. A flow chart for how to progress the asbestos report is attached to the bottom of this document, and for people with access to the Cornwall Council Intranet the full process can be found here. The supplier is responsible for ensuring that they request the above asbestos report for all work areas they are required to work in if the report isn t presented to them at the time of an initial survey. All further issues should be mailed to [email protected] Redundant and waste materials must be disposed of in accordance with the current WEEE Directives. Every effort should be made to avoid breaching fire breaks. Where a breach is unavoidable the break must be made good using an approved material such that current fire regulations are adhered to. The supplier must, at all times, adhere to the Council s current Health & Safety policies. In particular, safe working practices must be employed and work areas must be kept free from accumulations of materials, debris and equipment. Hazardous areas must be cordoned off and prominent warnings displayed. 7.0 Warranty A comprehensive warranty will be required providing the following minimum cover: 1 year on component defects 15 years on conformance to specification Suppliers must state whether or not the warranty is underwritten by a system manufacturer. Any caveats and conditions must be stated and agreed in advance. 8.0 Documentation and labelling 8.1 Labelling Patch panels, the Main Distribution Frame, and any Distribution Boxes used are to be fully labelled with clear unambiguous information. Cables will be individually labelled at a point 150mm from each termination. Telecommunications outlets will be labelled in a logical sequence around each room and the home terminations on the patch panel will also be Version

13 presented in a logical order and labelled with the corresponding outlet number. Where multiple wiring cabinets or frames are in use each frame will be labelled and its number referenced on corresponding outlets (e.g. Outlet 1A/025 is terminated on Frame1A, Outlet 2A/120 is terminated on Frame2A), this is to ensure any future expansion in a patch panel with multiple frames follows a logical numbering order. For large installations this detail will be specified on the schedule. 8.2 Documentation The following minimum documentation is to be supplied: Test results as identified above these may be in electronic form provided they are accompanied by a certificate confirming that each cable conforms to the test requirements identified above. A plan of the installation with cable routes and outlet numbers marked on it. Preferably this should be in AutoCAD (.dxf) or Microsoft Visio (.vsd) format. Appropriate warranties as defined above. A certificate to confirm that the voice cabling conforms to BS In addition for larger works (100 outlets or more): As installed cable distribution details in Microsoft Excel format, associating each cable and outlet with its location. Face plans of main distribution frame, patch panels and cabinets. Details of the wiring configuration used throughout for both horizontal wiring and for voice patch panels. 9.0 Acceptance Final acceptance will be dependent on the following: Confirmation that the installation meets this specification and the associated schedule in all respects. Receipt of satisfactory test results and documentation as described in paragraph 8. Receipt of the warranty as described in paragraph 7. The supplier will be required to remedy, at no cost to the council: Any and all deficiencies and non-compliance identified at handover Any faults that develop during the warranty period Version

14 Identify work/maintenance to be carried out Does it affect the fabric or materials within the property? NO Proceed with work/maintenance activity. YES Is the Asbestos Management Plan/Register available? NO Does the work involve breaking into or through Inaccessible Areas? YES Stop Work Contact ESL before proceeding YES NO Consult Register Can the affected material(s) be positively identified as non-acm s? NO Stop Work Contact ESL before proceeding Contact ESL for advice before proceeding Stop Work YES Does the Register indicate any ACM s that could be affected? YES Proceed with work/maintenance activity. NO Does the work involve breaking into or through Inaccessible Areas? YES Stop Work Contact ESL before proceeding. NO Proceed with work/maintenance activity. Monitor the maintenance/ works operations NO Are any suspicious materials encountered? YES Stop Work Contact ESL before proceeding ESL ACM KEY Engineering Services Laboratory Asbestos Containing Material Start of Process Completion Work by Premises Coordinator Work by Premises Coordinator with ESL Work by Premises Coordinator with Contractor Version

15 Prepared by: Strategic Planning and Standards Property Services 12 th April 2012 Rev Introduction: Category 6 UTP cable to be used in new installations. 1. Introduction: All components to be made from LS0H / LSF materials. 4.2 Patch frames: Minimum depth 1000mm where servers to be accommodated Introduction: Category 5e UTP cable to be used in new office installations. 1. Introduction: Category 6a Shielded UTP cable to be used in new data centre installations. 1. Introduction: New data centre installations will use components from the same manufacturer. 5.1 Fibre: Multi Mode Fibre Minimum OM3 (ISO11801) Patch Frames: 24 port and 48 port configurations to be used. 4.2 Patch Frames: New layout for patch panels. 4.2 Patch Frames: Only 1U s worth of voice ports are required unless specified. 5.2 Telephony Backbone: Section needs to be added to cover VoIP 6 Implementation: Council Project Managers responsibility to obtain full Asbestos reports for all areas of the building, not just office space. 8.1 Labelling: Each frame in a cab to have its own number scheme to enable future expansion to follow logical number order. If you would like this information in another format please contact: Cornwall Council County Hall Treyew Road Truro TR1 3AY Telephone: [email protected] Version