section 4 - 130743 - sbc st martins place refurbishment - electrical specification - tender issue -...

Ref: 130743

SBC - St Martins Place Refurbishment Electrical Specification 03/10/2013

Tender Issue: Rev T1

Page 1 of 33

4.0 PARTICULAR SPECIFICATION FOR THE ELECTRICAL INSTALLATIONS

Refer also to the Main Contract Preliminaries.

Unless otherwise stated, the word Contractor refers to the Electrical Contractor throughout the entirety of this document.

The Main Contractor shall have overall responsibility for coordinating the M&E installations.

The Contractor shall prepare designs, installation drawings, technical submittals for plant and equipment and other information for submission to the Consultant for comment.

The Contractor shall incorporate all Specialist Contractors information into composite installation drawings.

The Contractor shall prepare sufficient construction details to enable the design to be constructed, tested and commissioned.

The Contractor shall prepare sufficient builderswork information to the main Contractor to incorporate the service routes through the building elements.

The Contractor shall agree final setting out of accessories with the CA prior to installation.

Drawn and other information prepared by the Contractor shall be issued to the CA electronically in DWG and PDF formats.

Issue testing and commissioning information to the CA on completion of commissioning.

The Contractor shall provide a full set of record drawings, schedules of plant and scheduled manufacturers literature for items specified for inclusion in the O&M manuals.

All test certificates, commissioning information and O&M manuals shall be made available for inspection by the CA on handover of the project. Failure to do so may result in Practical Completion being delayed.

The Contractor shall comply with the requirements of the local building control officer in terms of Building Regulations Part L and the local planning authority in terms of plant noise.

The Contractor shall allow for 12 months maintenance on all items of electrical equipment and accessories installed or modified as part of these works.

4.1 DESCRIPTION OF WORKS

The works detailed in this specification are to be carried out to St Martins Place. St Martins Place is a three storey Office Building comprising two wings and a core area. The East Wing is approximately 660m and the West Wing is approximately 1100m. The building is a concrete frame structure with a brick external facade. The Building was built circa 1991. An open basement car park is located under the entirety of the building.

The majority of the electrical installation is original and was installed circa 1991. However, various refurbishments and modification works have been undertaken through the years.

Ref: 130743



Page 2 of 33

The works at St Martins Place are to be undertaken in a phased manner to allow staff to be relocated. Therefore the building will be occupied throughout the Contract Period. It is envisaged that the phasing will be undertaken as follows:

Phase Area Phase 1 Second Floor West Phase 2 First Floor West - 50% Phase 3 First Floor West - 50% Phase 4 Ground Floor West Phase 5 Second Floor East Phase 6 First Floor East Phase 7 Ground Floor East Phase 8 Reception and Core Areas

As the works are carried out, the phased areas will be cleared of occupants, desks and equipment, clearing by others. In the East Wing, the entire floor will be cleared and this area will be deemed a Construction Site and will be managed by the Main Contractor. As the West Wing is split into two areas, the Contractor shall allow to provide and erect suitable temporary hoarding to separate the occupied and Construction Site. The hoarding shall be of a suitable construction to omit any noise transmission, to protect the Site and to avoid disruption to the occupants working on the floor.

As areas of the building will be in use whilst works are carried out and the Main Contractor shall take appropriate measures in terms of noise and managing the risk of disturbance and disruption to the existing building users. The Contractor shall allow for liaison with the Client so any disruptive works or services shutdowns are carefully coordinated as to not affect the normal running of the building. The Contractor shall give the Client at least 24 hours notice of any services shutdowns prior to work commencing.

This specification shall be read in conjunction with the Electrical Drawings:-

Drawing Number

Drawing Name Scale Revision Accuracy

E001 Small Power and Data, New and Existing, Ground Floor, East and West Wings

1:100@A0 T1 Indicative

E002 Small Power and Data, New and Existing, First Floor, East and West Wings


E003 Small Power and Data, New and Existing, Second Floor, East and West Wings


E004 Lighting, New and Existing, Ground Floor, East and West Wings


E005 Lighting, New and Existing, First Floor, East and West Wings


E006 Lighting, New and Existing, Second Floor, East and West Wings


E007 Fire Alarm and Misc Alarms, New and Existing, Ground Floor, East and West Wings


Ref: 130743



Page 3 of 33

E008 Fire Alarm and Misc Alarms, New and Existing, First Floor, East and West Wings


E009 Fire Alarm and Misc Alarms, New and Existing, Second Floor, East and West Wings


E010 Basement LV Distribution 1:100@A0 T1 Indicative E011 Roof Electrical Layout 1:100@A0 T1 Indicative E012 Ground Floor Electrical Layout 1:100@A2 T1 Indicative

As well as the drawings listed above, this Specification shall be read in conjunction with the:

- Main Contract Preliminaries - Builders Work Specification - Electrical Specification - SMP Drawings - Electrical Drawings

A large number of record drawings exist for this site, some of which will be issued, for reference only, as part of the Tender Documents. It should be noted that not all of the record drawings will be accurate as a large number of refurbishment and modification works have been undertaken since the building was built and not all of these works have be recorded.

An Asbestos Register exists for the building and this should be reviewed prior to any works being undertaken. If any items are found and thought to be Asbestos Containing Materials (ACMs), works in this area should be stopped immediately and this shall be reported to the CA. Works shall only resume in this area once it is deemed safe to do so.

The electrical installation shall comprise the following services:-

LV Distribution and Small Power General and Emergency Lighting Telecommunications and IT Infrastructure CCTV Audio Visual Panic Alarm Fire Detection and Alarm Security Detection and Alarm Hearing Induction Loop Disabled Alarm Door Access

Ref: 130743



Page 4 of 33

4.2 BUILDERSWORK IN CONNECTION (BWIC)

Provide all Builderswork In Connection with the M&E services (BWIC)

Provide all Builderswork In Connection with the specialist services such as CCTV, Mechanical supplies, hearing loops, panic alarms etc.

Liaise with the Client to agree the scope, start date and duration of any builders works that relate to adjacent, occupied floors of the building.

Ensure all BWIC is properly coordinated with the architecture and structure.

Ensure due allowance is made for all BWIC, including but not limited to, ALL holes, notches, chases, chambers, covers, plant bases, steelwork, frames, upstands, supports, cast in fixings etc. necessary to enable installation and completion of the building services systems.

Provide details of BWIC to the principal contractor in accordance with the overall programme.

Free-issue all elements of BWIC to be cast into the structure by the Principal Contractor (anchor points, AV mounts etc.)

Provide all other BWIC

Comply with the Construction Design and Management (CDM) Regulations.

Ref: 130743



Page 5 of 33

4.3 V[20] LV DISTRIBUTION

4.3.1 DESCRIPTION OF WORKS

All works in shall be carried out in accordance with the 17th Edition of the IET Wiring Regulations (BS7671:2008) and its current ammendments.

Measure the characteristics of the supply (Voltage, PSCC, Ze, etc.) at the main switchboard to enable accurate design calculations to be undertaken.

Replace local distribution boards 1No in each wing on all three floors (6No in total). The local distribution boards shall be upgraded to 24way TP&N MCB panel boards by Merlin Gerin their Type Isobar 4c or equal and approved. Each board shall be complete with integral switch disconnector rated at 125A TP. The contractor shall allow to disconnect and reconnect all existing circuits to include for the installation of new MCBs, RCBOs to match the existing rating. All new supplies shall be fitted with the appropriately rated MCB/RCBO as required to comply with BS7671. All existing Contactors and enclosures shall be disconnected and replaced like for like in a new enclosure.

At basement level the existing car park distribution board shall be replaced with a new 24 way TP&N MCB panel boards by Merlin Gerin their Type Isobar 4c or equal and approved. The new board shall be complete with integral switch disconnector rated at 125A TP. The contractor shall allow to disconnect and reconnect all existing circuits to include for the installation of new MCBs, RCBOs to match the existing rating. All new supplies shall be fitted with the appropriately rated MCB/RCBO as required to comply with BS7671. All existing Contactors and enclosures shall be disconnected and replaced like for like in a new enclosure.

The Contractor shall supply and install a new mechanical services distribution board within the basement car park for the sole provision of new mechanical supplies to new AHUs. The new distribution board shall be fed from the East floor riser DB Unit L1. The Contractor shall install new supply cabling and new 100A BS88 fuses into the spare fuse carrier in this distribution board.

New supplies shall be provided from existing and new control panels and distribution boards to new mechanical equipment as required to provide a full working system.

Provide power for socket outlets, fixed appliances, fused connection units and the like to all areas as detailed on the Tender drawings and as detailed herein Refer also to section V[22] General LV Power.

Provide power for lighting to all areas of as detailed on the drawings and herein. Refer also to section V21 Lighting

Provide sufficient circuits to limit disruption in the event of any single circuit failing this will be achieved in office areas by limiting the circuits to 1No per desk cluster.

Provide high integrity earthing throughout, in accordance with section 543.7 of the 17th Edition of the IET Wiring Regulations (BS7671:2008)

Ref: 130743



Page 6 of 33

A provisional sum has been allocated for the provision of Part L energy metering and the interlinking bus cable.

Ensure the works on at any level or wing do not impact on the operation and use of occupied floors or central plant serving those floors at any time.

4.3.2 DESIGN CRITERIA

LV supply from local network: 400V, 3 Phase, 50Hz, Earthing Arrangement: PME supply (to be confirmed by the contractor on

site)

The entire installation shall comply with the requirements of: The 17th Edition of the IET Wiring Regulations (BS7671:2008) British Standards and Codes of Practice, The Electricity at Work Act The requirements of the Electricity Supply Authority, Health and Safety, Local Fire Safety and Building Control requirements End-use energy metering in accordance with Part L 2006

4.3.3 SYSTEM REQUIREMENTS

Design, supply, install, test commission and set to work a complete LV distribution system.

Provide all cables, containment, fixings, electrical accessories, equipment etc necessary to form a complete system.

All electrical installations shall comply fully with the 17th Edition of the IET Wiring Regulations (BS7671:2008) herein referred to as the wiring regulations.

The system shall be installed and tested in accordance with the IEE Regulations (BS7671) and all other statutory requirements.

Provide a complete, fully operational and safe power distribution installation to provide 230V and 400V, 50Hz electrical supply as required.

The system shall have adequate capacity to cope with the envisaged load.

The system shall be designed with a minimum of 25% spare capacity or at the sizes indicated on the tender drawings, whichever is largest, to allow for future expansion and/or modification.

The system shall be fully rewireable with the minimum amount of disruption to the building fabric or finishes.

Provide power to all equipment and appliances as required by the new layout drawings.

Ensure the system is designed such that discrimination between devices is achieved at all fault levels.

Ref: 130743



Page 7 of 33

Ensure all devices are rated such that the maximum prospective short circuit current (PSCC) is not exceeded.

Ensure conductors are sized with due regard for (i) correction factors for grouping, insulation, temperature etc. (ii) maximum permitted voltage drop (iii) maximum earth fault loop impedance (iv) maximum permitted disconnection times.

Provide a copy of all calculations for information. The calculations will not be checked by the CA and responsibility for all calculations remains solely with the Electrical Contractor. Calculations shall be issued two weeks prior to commencement of the Contract.

Ensure the entire installation is safe and reliable, easy to inspect, maintain and test.

Select all equipment, materials and accessories such that the installation is appropriate for its intended use and the environment in which it is installed.

Provide new distribution boards and devices as required. All boards, devices, components, ancillaries etc. shall be from a single supplier. All boards to be Merlin Gerin Isobar 4c or equal and approved.

Agree all fixings, chases and penetrations etc. through the existing structure with the Contract Administrator prior to forming any holes. Provide detailed builders work drawings to illustrate the size and extent of any such work.

Label all new AND existing circuits with engraved Traffolyte labels. Provide unique circuit references at the distribution board and on each electrical accessory to simplify ongoing testing and maintenance. Provide new distribution board schedules and update the existing schematic.

4.3.4 POWER AND CABLING DISTRIBUTION GENERALLY

Ensure all parts of the system are appropriately rated for the system characteristics. In particular,

Confirm that nature of supply, fault current ratings and device arrangement will provide discrimination between higher rated devices and lower rated devices at all parts of the system and for all fault conditions.

Ensure the maximum earth loop impedance for any device is not exceeded Ensure the maximum disconnection times are achieved Ensure all parts of the system are appropriately rated for the current and

voltage present

Provide cable protection via protective devices as appropriate.

Primary (submain) distribution to be in XLPE/LSF insulated steel wire armoured copper cables on perforated galvanised steel cable tray, operating at a conductor temperature of no more than 70degC.

Final circuits shall be made in PVC sheathed 3c cable (twin and earth), white sheathed, LSF insulated copper conductors (70C), generally on under floor cable tray and ceiling trunking.

Ref: 130743



Page 8 of 33

Ensure trunking fill factors do not exceed 50%.

New floor boxes shall be complete with steel load plate, steel lid and trim plate. All blank plates, boxes, glands and accessories as require to provide a full and complete installation.

Fire alarm power circuits shall be made in Enhanced fire protected cable in accordance with BS5839-1:2013, as Prysmian FP200 Gold or equal and approved.

All cables shall be BASEC certified. Standard fire protected cables shall be both BASEC and LPCB certified.

Provide containment and appropriate support structures for all electrical services. All containment shall be mechanically and electrically complete.

Where 3 or more circuits are present, generally provide hot dipped galvanised steel multi-compartment trunking.

Generally, where 2 or fewer circuits are present, provide Class 4 hot dipped galvanised steel conduit.

Ensure all containment and electrical tray/basket supports the installation over the full length of the cable runs. Ensure minimum bending radius of cables are achieved and proprietary bends, junctions and the like are used. Site fabricated junctions/bends will not be accepted.

The final sizing and selection of electrical containment is the responsibility of the Contractor, as described in the preliminaries.

The majority of the works relate to the installation of additional low voltage socket outlets for new meeting rooms and desk outlets. The Contractor shall allow to modify the existing trunking and power systems to provide adequate power supplies for this purpose. Each desk shall be provided with a new multi plug power module (provided by the furniture package) which can interlink up to 3no power modules per single 13A socket outlet. Therefore a single 13A socket outlet can provide power to three number desk modules. The Contractor shall allow to modify and relocate the existing small power circuits such that each desk cluster is fed by a single small power circuit. To this end the Contractor may reuse as much of the existing system as possible. However, no joints will be accepted within the small power circuits and it is the Contractors responsibility to verify socket positions and quantities of new sockets and circuits within their tender. Our drawings indicate a possible circuit configuration, this is based on Record drawings and cannot be relied upon to be accurate for the purposes of Tendering. The Contractor shall be required to attend site and review the existing socket locations to understand the requirements of the project.

Where dado trunking lid is modified for the purposes of the installation full lengths shall be used on a run. Where full lengths of lidding cannot be fitted then a continuous piece shall be fitted. The installation of part sections of lid will not be accepted. All dado trunking shall be manufactured by MITA their type Cableline to match the existing installation.

Ref: 130743



Page 9 of 33

All new general purpose sockets shall be white high integrity 13A double sockets as MK K2476WHI. Single sockets will not be permitted on Dado trunking runs. Where indicated as being fitted to the building fabric all sockets shall be flush mounted and fed by galvanised steel conduit drops with proprietary adapter kits for installation into cable tray and trunking systems. All containment shall be mechanically and electrically continuous.

A new charging circuit shall be introduced. This circuit will be dedicated for the charging socket on each desk. All outlets for charging purposes shall be grey in colour and complete with high integrity earthing. This circuit shall be on the same phase as the corresponding general sockets to avoid two different phases being present at the desk. The charging circuit shall be controlled on a wing by wing basis as follows.

A new 24 hour 7 day two channel digital controller shall be provided at each ground floor riser cupboard. This controller will set the time and day for which the charging circuit will be active. Therefore the west and east wing will have individual controllers, (2No in total)

The new controllers will switch a controlling contactor (NC) such that it energises new contactors at each floor.

New contactors shall be installed adjacent to the new distribution boards and will be sized and rated to switch 230V supplies. These local contactors will switch the charging circuits on, thereby supplying the dedicated socket outlets.

When the allocated time has elapsed the time controller will switch the control circuit to the off position thereby de-energising the contactors on each floor and switching off the charging circuit.

The charging circuit will have dedicated desk modules (part of the furniture package) that will connect to a desk mounted 13A socket. This will be used for the charging of mobile devices.

Under no circumstances shall mutli-pole contactors be used to switch neutral conductors.

All contactors shall be suitably rated for the switching of the connected load and shall be normally closed such that the failure of the contactor energises the circuit.

The Contractor shall allow for the installation of all wiring in between contactors and any containment and supplies as required to design, supply and install the above. All cabling shall be in FP200 or BICC multicore.

Allow for all conduit and any additional trunking or tray to achieve the required containment of electrical and communications installations.

Containment shall be run concealed wherever possible. With the exception of perimeter skirting trunking. Drops to final terminations shall be concealed within the buildings fabric or within surface mounted dado trunking drops.

Ref: 130743



Page 10 of 33

All containment and supports shall be galvanised steel. Include all fittings, draw boxes, saddles, etc and all fixings to the fabric. Use appropriately rated containment, cable glands and cable types where electrical services are run externally.

The Contract Administrator shall require a full set of cable calculations for the proposed works prior to works being undertaken on site. Cable calculations shall be provided in Amtech or Hevacomp format.

All containment shall be installed with adequate space around the installation to allow future modification of the cables.

Supply and fit fire and acoustic barriers in all cases when a trunking goes through a wall. Trunking must be identified on two visible sides by colour bands 50mm wide at 2m centres as follows;

Low voltage - yellow Emergency low voltage - orange Fire alarm - red Data/telecommunications - green Security - white Sound and communications - blue

To minimise harmonic generation in the cabling installations, with reference to bulk power supplies:

- Bunch phase and neutral conductors - Rotate phase and neutral conductors on long runs - Avoid ferrous separation of phase and neutral conductors - Eliminate any metallic shorted turns around any phase or neutral conductor

4.3.5 General LV Power

The Contractor shall design, supply and install a new small power installation as described below.

4.3.5.1 Office Spaces

Dado Trunking, amend as required, provide metallic EMC screens between LV and data compartments. Provide proprietary cross over pieces, joints, internal and external bends, backing boxes etc as required to provide a full and complete installation. Provide sockets outlets to provide adequate provision for new desks and associated equipment (photocopiers, printers etc)

Provide additional flush mounted sockets as detailed on the Tender drawings.

4.3.5.2 Reception

As part of the project a new reception desk shall be installed. This will broadly be in the same position as the existing but will cover a larger area with dedicated wheelchair access. The Contractor shall allow to strip out the existing small power system and provide new to suit the new reception desk. The Contractor shall allow

Ref: 130743



Page 11 of 33

for all power supplies as required to provide power to dedicated specialist systems currently located on the desk, this will include but is not limited to;

CCTV Fire Alarm modules Door Alarms Door Interfaces Panic Alarm Boards Telephone IT

Any specialist system shall be fed from a dedicated spur from existing circuits which shall be modified and extended for this purpose.

In addition to the above all computer systems as existing will require new power outlets. All power shall be mounted on under desk dado trunking.

A new hearing loop is to be provided to the reception desk and a supply for this system is to be installed from a dedicated circuit.

4.3.5.3 Soft Play Area

The contractor shall provide new small power supplies to the newly created soft play area at reception.

This shall include for new flush mounted socket outlets (2No), new supplies for hearing loop and CCTV camera systems.

4.3.5.4 New Meeting Rooms

The Contractor shall allow to provide general power supplies as indicated below.

A minimum of 2No double switched socket outlets

Where seating is in excess of 6 persons this shall include for a ceiling mounted spur unit for installation of a projector. A flush mounted high level double socket outlet shall be provided for use by a dedicated television.

4.3.5.5 Informal Meeting Rooms

The Contractor shall allow for the installation of new floor boxes to all informal meeting rooms for the provision of the following.

8No 13A double sockets, associated data. If the informal meeting room is immediately adjacent existing perimeter trunking this can be used in-lieu of new floor boxes.

The Contractor shall make an allowance for additional outlets for unspecified IT equipment. This shall be 20% of the overall quantity.

4.3.5.6 Miscellaneous

Ref: 130743



Page 12 of 33

The Contractor shall allow for the installation of dedicated fused spurs for specialist equipment including but not limited to

Panic alarms CCTV Fire Alarm equipment Door Access IT/Comms Mechanical Supplies Hair Driers

4.3.5.7 Mechanical Supplies

The Contractor shall allow for all Mechanical supplies as required to complete the works. The contractor shall allow to disconnect and reconnect all existing fan coil unit supplies including the installation of interconnecting wiring.

The Contractor shall provide new mechanical supplies to new AHU plant and associated fans. This includes but is not limited to

New East Wing AHU at roof level New West Wing AHU at Roof Level New East wing AHU in Basement Car Park New West Wing AHU in Basement Car Park New Chilled water pumps at Roof level. Hot Water generation plant Toilet Extract and Ancillary AHUs /Fans/pumps

The Contractor shall allow for the interfacing of new solar thermal equipment installed by mechanical specialists. This may include the installation of inverters, distribution boards, circuit protection and cabling. A provisional sum has been provided for this element.

The Contractor shall allow for the removal and replacement of floor and ceiling tiles and all access panels as required to complete the installation. The contractor shall allow to replace any damaged tiles or fabric created by the works.

4.3.6 FINAL CIRCUITS AND ELECTRICAL ACCESSORIES

Provide final circuits and electrical accessories as detailed within this specification and to ALL devices that require power, including but not limited to socket outlets, fused connection units for mechanical plant items, specialist installations, catering equipment etc., isolators, fixed equipment and a like.

Provide all electrical accessories complete with matching backing boxes. All electrical accessories are to be surface mounted.

All electrical accessories shall be sourced from a single range, as MK Logic plus or equal and approved.

Ref: 130743



Page 13 of 33

All small power circuits shall be fitted with 30mA RCBOs as required to comply with BS7671:2008. RCBOs shall be easily accessible for testing and reset and shall be clearly labelled.

All final outlets to PC equipment shall be fitted with high integrity earth terminals and high integrity earthing shall be provided to all circuits serving IT equipment or other devices with high earth leakage.

The Contractor shall allow for all mechanical supplies as required to facilitate the mechanical installation. This shall include but not be limited to.

All interconnecting wiring both power and controls Fused connection units Rotary isolators (single and three phase) Fused switches (single and three phase)

Where external power supplies are to required all final connections shall be within accessories rated at IP54 or greater.

Switched, fused connection units shall be provided with a flex outlet, where appropriate to suit the application i.e. serving fan units.

All electrical accessories shall be mounted in accordance with the Building Regulations Part M:2004. Connection units for fans and urinals may be located at high level to suit the application.

Allow for wiring and testing to new fans, where the fans are installed by the mechanical contractor. Provide a switched fused connection unit and 3-pole fan isolator for each fan circuit.

Label all new electrical accessories to indicate the circuit they are fed from.

Where more than 250V is present in any room or within an electrical component, ensure the item is suitably rated and is provided with warning labels compliant with the wiring regulations.

Ref: 130743



Page 14 of 33

4.4 Lighting

The Contractor shall design, supply, install and commission a new lighting system as described below.

All luminaires shall be installed with all accessories, louvers, lamps, suspension points and interconnection kits as required to provide a full and complete installation.

All luminaires shall be fitted with high frequency or electronic ballasts. All lamp types shall be energy efficient and the use of Low Voltage Halogen spotlights is to be avoided.

Lighting Levels and Controls

Offices Recessed modular luminaires by Fluorel Lighting to match the existing installation. Lamp types to be PL to match existing in colour temperature and appearance. Lighting layout to be designed to achieve CIBSE LG12 and LG7 compliance. Maintained average illuminance shall be 300-500 lux at 750mm AFFL with a uniformity not less than 70%.

Toilet and shower areas shall be lit to a maintained average illuminance of 200 lux AFFL with a uniformity of 70%. Luminaires shall be suitably IP rated for the environment.

Soft Play Areas - shall be lit to a maintained average illuminance of 300 lux AFFL with a uniformity of 70%.

The Contractor shall allow for all contactors, wiring, power supplies, switches and accessories as required to provide a full and complete installation. All luminaires / photocells shall be terminated plug adapters for ease of maintenance. All new luminaires shall be wired using the flex 7 system with 2No control outputs such that 2No sensing circuits may be used.

All PIR and Microwave sensors will be compatible with the Flex 7 system and shall be recessed and discreate to match the existing.

All lighting shall comply with current British Standards and CIBSE Guidance. The Contractor must provide samples of all proposed luminaires for review prior to installation.

The selection of lamp types shall be such that the colour rendering properties and their visual appearance are the same and match the existing..

The Contractor shall supply 3D rendered calculations for all areas including indicative furniture layouts and correct colour reflectancy for material finishes. As the lighting scheme for the areas is to create a specific mood the lighting scheme will be reviewed by the clients representative. Lighting calculations are required 2 weeks prior to undertaking works and shall include a summary sheet of maximum, minimum and average lux levels along with uniformity. Where relevant, information on compliance / non compliance with CIBSE LG7 shall be clearly identified.

Preferred lighting packages are Dialux, Relux or IES add-on Flux PL with radiance.

Ref: 130743



Page 15 of 33

All light fittings and lamps shall be supplied from a single batch to ensure consistency of appearance.

Ensure all light fittings comply with the requirements of the Building Regulations for minimum installed lumens/circuit-watt. Preferred manufacturers include

Concord Lighting - http://www.concordmarlin.com/ Thorn Lighting - http://www.thornlighting.co.uk/gb/en/index.htm Cooper Lighting - http://www.cooperlighting.com/ Delta lighting - http://www.deltalight.com/ Fluorel Lighting http://www.fluorel.co.uk

Or equal and approved.

The Contractor shall allow to modify the existing lighting installation to facilitate the new layout. This will include the rewiring and relocation of luminaires, sensors and LCMs as required.

Existing LCMs may be re-used where appropriate. The drawings included within the package indicate a suitable lighting arrangement and is indicative of the type of relocation that is required. The contractor is required to verify the position of existing luminaires a the time of Tender to provide an accurate price.

All interconnecting wiring, LCMs and ancillary devices as required to provide a full and complete installation shall be provided by the Contractor.

Ref: 130743



Page 16 of 33

4.5 Emergency Lighting

The Contractor shall allow to design, supply, install and commission a new emergency lighting system in full compliance with BS5266

The emergency lighting system shall comprise integral emergency luminaires with 3 hour battery back up facility and green LED charging indicators.

As required by BS5266 the Contractor shall install new emergency bulkheads luminaires with directional Euro-norm running man legends.

The Contractor shall supply emergency lighting calculations for all areas. Lighting calculations are required 2 weeks prior to undertaking works and shall include a summary sheet of maximum, minimum and average lux levels along with uniformity. All reflectancies shall be set to 0% as dictated by BS5266. Lamp efficacy factors must be obtained from the manufacturer and the correct settings used to ensure the emergency lighting calculations are as accurate as possible.

The Contractor shall install test key switches adjacent to the distribution board from which it derives its supply. The test key switches shall derive their supply from the supply side of the switch for the general lighting in the area served by the emergency luminaire so that failure of the local final circuit will operate the emergency luminaire. Upon operation of the key test switch the luminaires shall remain in operation and the emergency lamp will operate at emergency level.

Ref: 130743



Page 17 of 33

4.6 Telecommunications and IT Infrasturcuture

4.6.1 General

The Contractor shall employ a specialist to design and install a complete, new structured cabling installation as detailed herein. Specialist as Draka or equal and approved.

The Cat 5e structured cabling to be installed shall serve the data network, telephone network, BMS and wireless network where necessary.

Provide all containment, cables, back boxes, face plates, outlets, patch panels, terminations, inspection and testing to provide a COMPLETE system. Pull and terminate each cable at either end and inspect and test each data cable between the patch panel position and final outlet.

Patch leads and final patching of the cabinets will be provided by others.

The cable to be installed shall be LSOH and shall be routed from the cabinet location to the outlet location via basket/containment and routes.

The majority of outlets to be installed are in Quadruple plates but where density or specific usage dictates will be doubles. These are to be presented in single/double gang back boxes respectively with the modules mounted in faceplates defined as part of the design. As MK or equal and approved.

Each wing has its own dedicated IT room where all cables shall be presented, each cable shall have a 2m flex and shall be terminated either end, RJ45 male at patch end and into the final outlet. A full Cat 5e permanent link Class D test shall be performed on every cable installed as per the latest standards including the use of protective sock on cable bundles where necessary in the cable run. The test results are to be documented electronically with the cable ID corresponding to the identification label at the installed outlet and supplied to the Network Manager on CD. Further to this an Excel spreadsheet is to be supplied with details of the cabinet locations patch panel layout, detailing the room numbers or zones that each port is wired to as well as record drawings are to be issued with the test results A current calibration certificate for the test equipment used is also required.

Each outlet shall be identified and labelled showing the room number of the communications rack, patch panel number and port number of the patch panel e.g. PR1/pp2/15 (cabinet in plant room 1 (PR1), wired to patch panel 2, socket 15). These are to be produced on traffolyte labels and affixed to the outlets. Outlet identification shall be provide at all outlets (new and existing).

The patch panels need only be numbered with the prefix PP at each end of the patch panel starting from the top of the cabinet and working down.

The Contractor shall not allow the coiling up of data cables. Jointing of data cabling will not be accepted. Ensure minimum bending radius are achieved throughout the installation. Ensure basket fill capacities (maximum 50% fill) or cable crushing weights are not exceeded.

Ref: 130743



Page 18 of 33

No crossovers requiring penetration of data trunking or vice versa will be accepted, power wiring must be kept totally separate from data.

Where new containment is necessary, all data cabling shall be run on galvanised metallic basket above ceilings and in perimeter trunking as appropriate. Data cables shall not run surface and unprotected in any areas including above suspended ceilings. Under no circumstance shall PVC or any other form of cable ties be used to secure cables to the building fabric.

Existing cables and outlets may be reused providing the cables are long enough for the intended position. Cat 5e cable shall not be jointed or extended by any means to facilitate the reconfiguration of outlets. When reusing cables the Contractor shall allow for the remocal and reliddiing of all containment as required, all tests shall be undertaken to the reused cable as if it were a new installation.

For the purposes of the Tender it is assumed that the number of outlets indicated on the tender drawings is sufficient. This will be confirmed by detailed survey and a variation of cost confirmed between the Contract Administrator and the Contractor on a pro rata basis.

4.6.2 CCTV

The Contractor shall supply, design and install new globe CCTV cameras at the positions indicated. These will be wired back to the multiplexer located at the reception desk. From the multiplexer all signals are to be transmitted to the town hall via the existing link. The Contractor shall allow for all cabling, containment and power as required to provide this installation.

The Contractor shall allow to relocate the existing CCTV camera in the ground floor reception.

Details of the existing system are to follow and a provisional sum has been entered for this element.

Liaise with Peter Webster of SBC for final arrangement of CCTV network.

Ref: 130743



Page 19 of 33

4.7 Audio Visual

The Contractor shall install a switched fused connection unit for all equipment relating to the audio visual installation. Where required wall mounted controls shall be provided free issue by the client and installed by the Contractor.

The Contractor shall coordinate all builders works elements relating to this installation such that all cable routes, cutting of building fabric, provision of supports, provision of wall fixings and all associated fabric alterations are undertaken as part of these works.

Each item of audio visual equipment shall require a dedicated Cat5e RJ45 connection adjacent to the fused spur feeding it.

Ref: 130743



Page 20 of 33

4.8 Panic Alarm System

Develop the design, supply, install, inspect, test and commission a complete staff panic alarm system in accordance with all relevant, current British Standards and NACOSS approved codes of practice.

The design of the security system shall be the responsibility of the security specialist Contractor.

Provide a stand-alone staff panic alarm system to the all new public meeting rooms as indicated on the Tender drawings, each area shall comprise; 2No. two finger push panic alarm buttons in the positions indicated on the

drawing Combined beacon and sounder units (at least 80dB(A) at 1metre) located

outside the room and in the common office area immediately adjacent (1No per room) labelled with room number

Panic alarm control unit with key controlled reset button Power to the panic alarm unit via un-switched fused connection unit labelled

Panic alarm do not isolate All power/controls cabling between the main unit and sounders/beacons push

buttons. Link to reception desk with combined visual indicator panel, engraved with

associated room number and visual/audible indicators.

Allow for containment and concealment of cabling in ceiling voids (refer to electrical section regarding removal, storage and replacement of existing ceiling tiles).

Ref: 130743



Page 21 of 33

4.9 Fire Alarm

The existing fire alarm system is to be retained and modified to suit the new layout in accordance with BS5839

The Contractor shall allow to design supply and install a fire detection system to provide protection in line with a BS5839 L1/P1 system)..

The Contractor shall allow for all cabling, accessories, relays, smoke detectors, heat detectors, electronic self contained sounders, manual call points and zone isolators as required to provide a full and complete installation. A flashing beacon shall be required within all toilet facilities.

The Contractor shall allow for equipment and wiring to pick up all new or existing fire dampers, mechanical plant shut downs and any and all equipment which should be linked to the fire alarm system.

Interfaces which are likely to be require include but are not limited to.

Door release interfaces Mechanical plant/new existing Fire Dampers Fire Shutters.

All wiring shall be in red sheathed FP200 Gold.

The Contractor shall allow to fully commission the fire alarm system and ensure operation is in full compliance with BS5839.

The Contractor shall produce an updated fire alarm schematic prior to handover. To include all devices, interfaces and addresses. An additional fire alarm zone chart shall be required and shall be fitted within a frame with a glass cover and shall be mounted adjacent to the existing main panel.

A full schedule of devices and their addresses shall be produced for inclusion within the operating and maintenance manual.

All devices shall be labelled with their device address using dyno labels, (not pen).

Maintain the system at all times. Provide temporary detection and alarm as necessary. Undertake works out of occupied hours as necessary. Agree all service interruption dates and durations with the CA and client before undertaking the work. Provide at least five working days notice.

A new fire shutter will be installed at Ground, First and Second floors. The associated fire alarm interface for activation and resetting of the shutters will be provided at each floor with dedicated power supplies.

The incumbent maintenance Contractor is Bonnells, Tel 02088458455

Ref: 130743



Page 22 of 33

4.10 Security

The Contractor shall allow to deactivate, relocate, reinstate, extend and install new PIR devices as required to facilitate the works.

This will include as a minimum the installation of new PIR devices to all newly constructed ground floor meeting rooms with external windows..

All devices and wiring shall be fully commissioned and operational prior to handover.

Make provision for temporary security to all levels throughout the duration of the contract at no-lesser level than that provided currently.

The existing security maintenance Contractor is Krypto Security.

Ref: 130743



Page 23 of 33

4.11 Induction loop

The Contractor shall supply, install and commission 1No new induction loop at the new main reception desk. The Contractor shall allow for appropriate signage at the desk in accordance with Nomads specification.

The Contractor shall allow to install an unswitched fused connection unit within the desk dado trunking to provide power to the system. The unswitched fused connection unit shall be labelled Induction Loop using a traffolite label.

An additional Induction loop shall be provided within the soft play area adjacent to the main reception at ground floor level.

The Contractor shall allow to install an unswitched fused connection unit within the desk dado trunking to provide power to the system. The unswitched fused connection unit shall be labelled Induction Loop using a traffolite label.

Ref: 130743



Page 24 of 33

4.12 Disabled Alarm

The Contractor shall design, supply, install a new disabled alarm system for new disabled toilets and showers.

Within each disabled toilet new pull cords, reassurance lamps and a rest button shall be installed in compliance with Part M of the Building Regulations. An external buzzer/sounder shall be mounted above the head of the main door to the toilet area. All buzzers shall be repeated back at the local open plan reception area by a wall mounted lamp/buzzer unit. Each lamp shall be labelled with a traffolite label referencing the alarm.

The Contractor shall allow for all small power requirements pertaining to the new disabled alarm system. Final terminations shall be in unswitched fused connection units.

The Contractor shall allow for all wiring, accessories containment and ancillary items as required to provide a full and complete installation.

Ref: 130743



Page 25 of 33

4.13 Door Access

The Contractor shall allow for the installation of new door access equipment to the new access door to the west wing located within the ground floor reception area. The access provision will match the existing door access system currently installed to the main office area at the ground floor west access door. This will include but not be limited to.

Key pad Door release Fire Alarm Interface Power Supplies Cabling Power assisted door Manual Override via break glass.

SECOM Ltd undertake the maintenance on or door access systems they can be contacted on 08000234832 or 08454851805.

Ref: 130743



Page 26 of 33

4.14 Earthing and Bonding

The Contractor shall install all necessary equipment and cables in order that the installation complies fully with BS7671: 2008 and BS7430: 1998.

All final circuits shall be provided with separate CPCs, trunking and conduit shall not be used for this purpose.

Main and supplementary equipotential bonding shall be installed. Items to be bonded shall include but not be limited to:

Drainage Hot and Cold Water Pipework Mechanical Services Suspended Ceiling Grid/System. Existing Plant.

Ref: 130743



Page 27 of 33

4.15 Verification of Final Circuits

The Contractor shall be responsible for the verification of all circuits. In addition the Contractor shall be responsible for the full labelling of all outlets including light switches, power outlets, data/tel outlets fire alarm points, emergency luminaires where the LED is not clearly visible and distribution boards serving the effected area. The Contractor shall use white traffolite labels with black or red text depending if it is normal or emergency power.

All final outlets shall be labelled with the final circuit designation. E.g. DB/P1/1-L1

Ref: 130743



Page 28 of 33

4.16 Temporary Power Supplies

As the works will be undertaken within a working building, the Contractor shall allow to provide temporary power as and when it is required to ensure there is no loss of supply to other areas of the building during the period of the works. This shall include but not be limited to.

Temporary distribution boards Temporary Sub-Main Temporary final circuits Temporary generators

Ref: 130743



Page 29 of 33

4.17 Testing Commissioning and Validation The Contractor shall be responsible for fully testing and commissioning the systems described in this section in accordance with all relevant British Standards, including but not limited to the 17th Edition of the Wiring Regulations, BS7671:2008

Due to the remainder of the building being occupied some of this work may have to be carried out outside of normal working hours. The Contractor shall make due allowance for any additional costs for this and schedule all such works at times/dates agreed by the PM.

The Contractor in accordance with relevant British Standards shall provide test Certificates.

The Contractor shall provide design validation on all services not covered by any mandatory test certificates. This shall include but not be limited to such items as;

Demonstrating compliance with general lighting illuminance levels Demonstrating compliance with emergency lighting illuminance levels Demonstrating the Fire detection and alarm System General system demonstrations

Ref: 130743



Page 30 of 33

4.18 Client training

The Contractor shall allow training on all services covered by this specification. This shall include a full explanation and walkthrough of all functions.

The Contractor shall appoint a trained person(s) to undertake the training and allow for a practical demonstration of the installation.

The Contractor shall at this time inform the end user of their statutory obligations with respect to the testing of services (e.g. fire alarm and emergency lighting)

Ref: 130743



Page 31 of 33

4.19 Stripping out

The Contractor shall allow for the sull stripping out of all services made redundant by these works. This includes but is not limited to ,

All cables to source of supply All containment All plant, switchgear or materials All accessories.

Ref: 130743



Page 32 of 33

4.20 BREAKDOWN OF COSTS FOR ELECTRICAL SERVICES

The Contractor shall complete this form with all pricing based on equipment as specified. This shall be provided AT SUBMISSION OF TENDER. Failure to complete this form based on equipment as specified shall render the tender void. All alternative equipment proposed by the Contractor shall be priced on the ALTERNATIVE PRICING sheet that has been provided. This shall be provided AT SUBMISSION OF TENDER. Failure to complete this alternative pricing form shall be interpreted that the Contractor does not wish to offer an alternative equipment price.

SECTION WORK SECTION DESCRIPTION COST () 4.2 Builders Work in Connection

4.3 LV Distribution

4.3 General LV Power

4.3 Mechanical Supplies

4.4 Lighting

4.5 Emergency lighting

4.6 Telecommunications and IT Infrastructure

4.6 CCTV

4.7 Audio Visual

4.8 Panic Alarm System

4.9 Fire Alarm

4.10 Security

4.11 Induction Loop

4.12 Disabled Alarm

4.13 Door Access

4.14 Earthing and bonding

4.15 Verification of Final Circuits

4.16 Temporary Power Supplies

4.17 Testing, Commissioning and Validation

4.18 Client training

Ref: 130743



Page 33 of 33

4.19 Stripping out

INSTALLATION DRAWINGS

OPERATION AND MAINTENANCE MANUALS

E1

E2

E3

PROVISIONAL SUMS:

Part L Metering

Works for Solar Thermal Hot Water

CCTV

8,500

1,000

10,000

OTHER ITEMS -

OTHER ITEMS -

TOTAL:

ALTERNATIVE PRICING:

The following is an alternative price based on alternative equipment. Following the tender analysis, a request, if deemed necessary, shall be made to the Contractor from the engineer for a detailed breakdown of cost. This cost breakdown shall be provided in line with Breakdown of cost for the electrical services.

COST ()