53 Cadogan Square London Apartment, Flat 5
Mechanical, Electrical and Public Health (MEP) Specification
CSA-JSM-ZZ-XX-SP-ME-00001
1st November 2023
Contact
The Nucleus Business Centre,
Brunel Way, Dartford
Kent, DA1 5GA
info@jsmassociates.com
Document Revision Control
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JSM ASSOCIATES LONDON
PROJECT 58 GROVE END ROAD
MEP SPECIFICATION
Revisions
Date
Reason for Issue
By
Approved
P01
01/11/2023
PRELIMINARY
IH
XK
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MEP SPECIFICATION
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MEP SPECIFICATION
1.0
INTRODUCTION
1.1
Purpose of this Specification
This report covers the MEP proposals for the refurbishment of a 2-bed apartment called 53
Cadogan Square Apartment, Flat 5.
The main output of this report is the statement of technical design parameters to be followed
for MEP services design and build by the Contractor in order to provide a fully code compliant
apartment that meets the Employers Requirements and their associated brief.
This document is to be read in conjunction with all other JSM documentation for this project,
including specifications, schedules, and drawings.
1.2
Basis of Design
The M, E and PH services shall be designed in accordance with the regulations, standards,
guidance notes and publications as detailed below.

Building Regulations Approved Document L2A 2010 edition - Conservation of Fuel and
Power

CIBSE Guide A, B and C

CIBSE Guide F - Energy Efficiency in Buildings

CIBSE Guide G - Public Health Engineering

CIBSE Guide H - Building Control Systems

CIBSE Guide L – Sustainability

Building Regulations Approved Document F means of ventilation.

CIBSE lighting guide 10 (LG10) Daylight and windows

18th Edition of the IET wiring regulations (BS 7671)

BS 5839-6 Fire Detection and fire alarm systems for buildings. Code of practice for
design, installation and commissioning and maintenance of systems in domestic
premises

BS EN 62676 Video surveillance systems for use in security applications. Application
guidelines

BS EN 62305 Protection Against Lightning

BS EN 50131 Alarm Systems for Intrusion and Hold Up

BS EN 60839-11-2 Alarm and electronic security systems. Electronic access control
systems.

BS 9999:2017 Fire safety in the design, management and use of buildings.

Health and Safety legislation
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
The Institute of Plumbing - Plumbing Engineering Services Design Guide

CIBSE Guide G - Public Health Engineering

BSEN 12056-1 Gravity drainage systems inside buildings. General and performance
requirements

BS EN 12056-2 Sanitary pipe work, layout and calculation

Building Regulations Document H

Water Byelaws 2000 and local water authority requirements

B.S.E.N. 806 Specifications for installations inside buildings conveying water for
human consumption. All Sections

Water Research Centre - The water fittings and materials directory

HSE Booklet HS(G)70 - The control of Legionellosis including Legionnaire’s Disease

HSE Document L8 - The control of Legionella Bacteria in Water Systems

Local Authority Requirements
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2.0
PROJECT OVERVIEW
2.1
Project Description
The property at 53 Cadogan Square is a Grade II Listed, mid-terrace property. Cadogan
Square is in the central west of the city of London in the Royal Borough of Kensington and
Chelsea. Flat 5 is on the third floor of the 7 storey mid-terrace domestic property. The internal
layout will largely remain the same, with some minor adjustments to the entrance hallway and
bathroom lobby area. Most of the works proposed are new finishes, joinery, and decoration;
they will replace non-original fabric and exclude changes to retain original fabric.
Project Address:
Flat 5,
53 Cadogan Square,
SW1X 0HY
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3.0
GENERAL CONDITIONS
3.1
Tendering Instructions
3.1.1 Site Visit
The tendering shall take into consideration the nature of the site and all local conditions and
restrictions likely to affect the execution of the Contract Works. The contractor shall inspect
any existing installations relevant to the works and study any relevant existing records. No
claims will be allowed after submission of a tender for lack of information or other reasons
which could have been resolved by such a visit to the site.
3.1.2 Interpretation of the Tender Documentation
Should there be any doubt about the precise meaning of any item for any reason; the
contractor must inform the office of issue of the tender documents in writing in order that the
correct meaning may be given. Any clarification of the meaning or intent shall be issued in
writing only and no other means of communication shall be valid.
3.2
Pricing and Costs
3.2.1 Schedule of Rates
Within 7 days of being requested to do so, the contractor shall submit a Schedule of Rates for
examination and comment prior to their approval.
The Schedule of Rates shall comprise a comprehensive quantified list of all items and
materials included in the Tender, together with their rate prices, extended and totaled.
The total shall agree with the Tender Sum and sub-totals shall agree with those of the items in
the Tender Summary annexed to the Tender.
3.2.2 Overtime and Allowances
The contractor shall include for all necessary overtime and other expenses in the contract
price that may be necessary to complete the works in compliance with the contract
programme.
3.3
Particular Conditions
3.3.1 Provide Everything Necessary
Provide everything necessary for the proper execution and completion of the contract works to
the true intent and meaning of the contract documents.
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Details of construction or materials which have not been referred to in the contract documents
but the necessity for which may reasonably be implied by this Employers Requirements
document (technical specification), or which are usually or essential to the completion of the
works, shall be installed with no additional cost.
3.3.2 Co-ordination of Trades
Allow for coordinating the contract works with the works of other trades and installations which
may be on site during the period of the contract.
3.3.3 Co-operation with Others
Ensure that the contract works integrate with that of others and that full co-operation is
maintained during the execution of the works with that of others.
Co-operate with the Main Contractor, other sub-contracts, suppliers, local authorities, and
statutory undertakings in the execution of the works.
3.3.4 Noise and Nuisance
Ensure that the contract works are undertaken with as little noise as possible. Take all
necessary precautions to prevent nuisance from smoke, rubbish, and other causes.
3.3.5 Programme
The Contractor will be required to submit a detailed programme of works prior to starting on
site. The programme shall include delivery dates of all equipment vital to the completion of the
works within the Contract period.
3.3.6 Storage
Weatherproof, safe, and secure storage shall be provided for all materials and equipment.
All materials and equipment shall be offloaded, stored, and transported in accordance with
manufacturer’s recommendations.
All electrical equipment and components shall be kept dry and free from dust.
Plug, cap or seal open ends on all ductwork, tubes, conduit, trunking, and associated
equipment whilst in storage and during transportation to site.
Provide racks to prevent distortion of pipes, conduit, and similar materials.
3.4
Obligations and Responsibilities
3.4.1 Obligations
This contract shall be implemented as indicated in the M&E contract drawings (refer to
appendix D).
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This technical specification and accompanied drawings are part of the M&E contract and
reflect the obligations of the M&E Contractor.
The Contractor shall provide working drawings prior to works and as-fitted drawings upon
completion of works along all relevant technical manuals/documents as a part of the contract.
All drawings shall be produced in CAD format (AutoCAD DWG Format). The Technical
Specification shall be read in conjunction with the Main Building Specification, Architect’s and
Structural Engineer’s drawings, Main Contract Terms and Conditions and Contract
Preliminaries.
The designs shall be submitted for all necessary Building Regulations Approval.
3.5
Co-ordination of Services
All aspects of the work require detailed co-ordination to avoid any possible clash or conflict
with other trades and disciplines. The Contractor shall undertake such co-ordination in relation
to the works.
Where any new, revised or updated architectural, structural or services information is issued,
the Contractor shall examine such information and if necessary, modify the works accordingly
to prevent any clashes or abortive work.
3.6
Health and Safety
3.6.1 General
It must be ensured that during the progress of the works on site, the general
recommendations of the ‘Health and Safety at Work Act 1974’ and subsequent additions
and/or modifications are adhered to.
A copy of the Contractor’s Health and Safety policy document, including risk assessment
procedures, shall be submitted as a part of his Tender.
A Health and Safety Information Pack will be prepared by the CDM Coordinator. However,
the Contractor shall comply with the requirements of the CDM Regulations by:
3.7
1)
Compiling risk assessments for the contract works.
2)
Providing information on the contract works which might affect the health and
safety of any person.
3)
Providing appropriate input to the Health and Safety Information Pack for the
works.
Description of the Works
The Contract Works shall comprise but not limited to the following:
1) Heating services installation.
2) Hot water services installation.
3) Gas services Installation.
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4) Cold water services installation.
5) Mechanical ventilation services installation.
6) Comfort cooling services installation
7) Thermal insulation.
8) Metering of new incoming mains water and gas services.
9) Above ground sanitary plumbing installation.
10) Rainwater pipework and gutters.
11) Part-L Compliance reports and Energy Performance Certificate (EPC).
12) Accept delivery, store, check, install, lamp-up and connect all types of light fittings &
led strips shown in drawings (provided by the employer).
13) Installation of the necessary infrastructure and cabling regarding the lighting control
system. Coordination with the lighting control system specialist.
14) Power and 13A socket outlet installations to all areas.
15) Main equipment and distribution for the following systems: BT Fibre Telecoms,
Structured Cabling, TV/SAT system.
16) Conduit/tray Infrastructure and pulling of system cables for: Fire & Burglar Alarm,
Video Door Entry, CCTV and A/V systems.
17) Power to HVAC systems, motors, pumps, and other mechanical equipment.
18) Earthing and bonding of electrical installation.
19) Testing and Commissioning.
20) Production & Submission of Working & As fitted Drawings and Operating/Maintenance
Manuals.
3.8
Commissioning and Testing
Pressure tests shall be applied to piping before connection of equipment and appliances. In
no case shall piping, equipment or appliances be subjected to a pressure exceeding their
rating.
Tests shall be completed and approved before any insulation is applied or pipes, valves and
fittings have been concealed. Tests shall be performed in the presence of the Installer and to
the satisfaction of the Engineer. Any leaks or defects uncovered by the tests shall be repaired
and the system retested as above; all at no additional cost to the Employer.
All water piping shall be tested and proved tight under hydrostatic pressure of at least 150% of
maximum working pressure but at not less than 3.5 bar. The prescribed pressure shall be
maintained for two hours. All gas piping shall be tested and proven tight under pneumatic test
of 50 mbar and in accordance with British Gas Publication IM/5 and Gas Safe Register
Regulations.
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All hot and cold-water systems shall be commissioned and regulated in accordance with
CIBSE Commissioning Code W and BSRIA Application Guide BG2/2010. Automatic control
systems shall be commissioned in accordance with CIBSE Commissioning Code C.
Ventilation ductwork systems shall be adjusted and balanced to deliver the specified air
volumes at each inlet and outlet. The air quantities shall be within 5% of those specified. Air
distribution systems shall be commissioned in accordance with CIBSE Commissioning Code A
and BSRIA Application Guide BG49/2015.
All electrical systems shall be tested in accordance with BS 7671 (IEE Wiring Regulations),
relevant Standards, Recommendations, Codes of Practice, Statutory requirements, Building
Regulations etc. Provide test result sheets and completion certificates.
All other Specialist systems and equipment shall be tested and commissioned by the relevant
Specialist. Provide test result sheets and completion certificates from the Specialists.
All electrical test result sheets and certificates shall be included in the O&M Manuals.
3.9
Record Documentation
3.9.1 Record Documents
Record documents shall comprise the following:
1) As fitted Drawings (CAD format).
2) Plantroom and switch room drawings and schematics.
3) Operating and Maintenance Manuals and Building Logbooks.
3.9.2 Record Drawings
The Contractor shall provide as a prerequisite of Practical Completion of the works, 3 copies
of all Record Drawings in print form and 1 copy on USB flash drive.
One set of Record Drawings shall be issued to the Engineer for comments at least three
weeks prior to issue of the completed documentation. The drawings shall be clearly endorsed
‘Record Drawing’ near to the title block.
The Record Drawings shall clearly indicate the position and size of all plant items, the layout
and size of all pipework, ductwork, valves, luminaires, switches, sockets, power outlets and
miscellaneous services outlets (i.e., telephones, data, security etc.) as actually installed. The
routing of all conduits, trunking and trays shall also be indicated, together with all earth bond
locations throughout the building. Detailed control and power wiring diagrams in connection
with the Mechanical Services shall be provided.
3.9.3 Operating and Maintenance Manuals
The Contractor shall provide on Practical Completion of the works 3 copies of the Operating
and Maintenance Manuals. The Manuals should include how the building is intended to work
and should explain to the occupier how to operate all systems efficiently. All information shall
be contained within suitable ring binders with hard covers. A copy of the manuals shall be
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issued to the Engineer for comments at least three weeks prior to the issue of the completed
documentation. The Operating and Maintenance Manuals shall be written in conjunction with
the Record Drawings and shall comprise the following:
1) A general description of the scope, purpose, and manner of working of each system or
apparatus forming part of the works.
2) A detailed description of the scope, purpose, and manner of working of each system of
automatic controls monitoring instruments and special services.
3) Data on general design parameters and associated normal operating temperatures,
pressures, correct operation etc., based on the commissioning activity.
4) Clear and comprehensive instructions for the starting up, switching on, running, and
shut down of each system or apparatus.
5) Clear and comprehensive instructions for dealing with emergency conditions for each
system or apparatus.
6) Instructions in respect of any precautionary measure from time to time necessary (e.g.,
against corrosion or freezing).
7) Instructions in respect of the care of apparatus normally subject to seasonal disuse.
8) Instructions as to the nature, extent, and frequency of servicing necessary properly to
maintain the works in good condition and as to the materials to be used for the
purpose. This information may be supported in detail, but not replaced, maintenance
instructions provided by the suppliers or particular component apparatus.
9) The names and addresses of suppliers of all major components of the works as it may
potentially be required to obtain spare parts of replacements.
Copies of the manufacturer’s data shall be supplied with respect to the nature, type and
method of operation of individual pieces of equipment, together with their detailed
maintenance instructions. Such data, in the form of individual booklets and the like, shall be
indexed and cross referenced to the Operating and Maintenance Instructions and presented
suitably protected in box files or folders.
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4.0
UTILITIES
4.1
Water
4.2
Electricity
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5.0
DESIGN CONDITIONS
5.1
External Design Temperatures
Temperature
5.2
Winter
-3° C Sat
Summer
31.5° C db / 20° C wb
Ventilation Rates
Bedrooms
l/s
Bathroom/Ensuite
l/s
Kitchen
l/s
Living Room
l/s
Entrance Lobby
l/s
Circulation Area
air changes per hour
Utility Room
Information taken from CIBSE Guide A, Table 1.5 and Building Regulations Approved
Document F where applicable.
All flow rates in the table above referring are the minimum high rates (Boost operation). The
minimum low rates will not be less that 0.3 l/s per m2 of the internal floor area in accordance
to Approved Document F.
5.3
Internal Design Temperatures
Winter Design
Temperature (°C)
Summer Design
Temperature (°C)
Bedrooms
xx
xx
Bathroom/Ensuite
xx
xx
Kitchen
Not Controlled
Not Controlled
Living Room
Not Controlled
Not Controlled
Entrance Lobby
Not Controlled
Not Controlled
Circulation Area
Not Controlled
Not Controlled
Area
Utility Room
Information taken from CIBSE Guide A, Table 1.5 where applicable.
No other humidity controls shall be provided to any areas.
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5.4
Acoustic Criteria
Area
Acoustic Rating (NR)
Bathroom/Ensuite
Kitchen
Living Room
Entrance Lobby
Circulation Area
Utility Room
Internal noise levels are in accordance with the Acoustic Consultant recommendations.
5.5
Domestic Hot and Cold-Water Services
The domestic hot and cold-water services installations will comply fully with the requirements
of BS 8558:2012 and BS EN 806-1-5, HSE ACOP L8 and the Water Supply (Water Fittings)
Regulations 1999.
Installations will be insulated for frost protection and anti-condensation purposes.
Service
Design Value
Daily Water Demand
260 litres per day for 2bedroom flats*
Cold Water Storage
50% of daily demand*
Cold Water Temperature
Ambient – Less than20°C
Daily Hot Water Demand
115 litres per day per bedroom*
Hot Water Flow Temperature
55°C
*Information taken from Institute of Plumbing Guide
5.6
Sanitary Plumbing
The above ground soil and waste drainage systems will be designed and installed in
accordance with the modified single stack system III principles of BS EN 12056: Part 2 and
part H of the building regulations.
Gravity and pumped condensate drainage will connect to the foul drainage system only.
Minimum Internal
Diameter (mm)
Minimum Depth of Seal
(mm)
Wash Hand Basin
32
75
Sink
40
75
Shower
40
50
Appliance
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Bath
40
50
WC
110
50
Data for table taken from BS – EN 12056 Part 2.
5.7
Internal Gains
Small Power Sensible
Heat Gain (W/m2)
Lighting Sensible
Heat Gain
(W/m2)
People
Sensible/Latent Heat
Gain (W/person)
En-Suite
40
8
61/39
Bedroom
20
12
61/39
Bathrooms
5
5
N/A
To suit equipment
selections
TBC
TBC
TBC
TBC
TBC
Entrance Lobby
5
10
N/A
Circulation Space
5
10
N/A
TBC
TBC
TBC
Area
Kitchen
Living Room
Utility Room
5.8
Lighting Levels
The proposed lighting levels are indicated below. Generally, these will be the minimum
average illumination levels to be achieved. However, as the interior design develops, there
may be the requirement for lower levels of illumination in certain areas to help create the
required mood and ambience.
Area
Recommended Lighting Levels
(Lux)
Bedrooms
50-150 on bedhead
Bathroom/Ensuite
150 on floor
Kitchen
150-200
Living Room
50-150
Entrance Lobby
100-150 on floor
Circulation Area
100 on floor
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5.9
Electrical Supply Characteristics
Design Electrical Characteristics
230 Volts (+10% -6%) AC 1ph 50Hz (±1%)
5.10
Voltage Drop Limits
For the purpose of cable calculations, the system will be considered a public low voltage
installation. According to BS 7671 the volt drop of the system will be no greater than the
following:
Maximum allowable Volt Drop
5.11
Spare Capacities
5.12
Fire Alarm
Lighting
Other Uses
3%
5%
Category of protection – LD1. The fire alarm detection installation will be provided in
accordance with all relevant codes and standards as well as:

Building Control Officer Requirements
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6.0
MECHANICAL AND PUBLIC HEALTH SERVICES
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ELECTRICAL SERVICES
6.1
LV Distribution
The Electrical Contractor shall design, procure, install, connect, set to work and
commissioning a complete and fully operational low voltage electrical distribution system
throughout the apartment in compliance with the 18th Edition of BS 7671, including automatic
disconnection of overloading circuits or faulty equipment to protect against electric shock.
The electrical supply from the utility meter to the consumer unit will be undertaken using
XLPE/SWA/LSOH cable.
A minimum allowance of 20% spare capacity shall be
6.1.1 Consumer Unit
The consumer unit shall comprise of the following:

Corrosion resistant metallic construction with durable finish.

Have IP31 degree of protection.

Be fitted with captive blanking plates on unused ways.

Be fitted with residual current devices (RCBO’s), T1+T2 surge arrestor, contactors or
other auxiliary devices as described in other parts of this specification.

Have all terminals and outgoing cables marked indelibly with circuit references and
phase, by using proprietary labels or cable ferrules as appropriate.

Be fitted with engraved ‘Traffolyte’ labels (mechanically fixed) to the front face.
6.1.2 Protective Devices
Protective devices will be selected to provide a coordinated system which will discriminate,
ensuring a short circuit or overload fault condition will be cleared by the protective device
immediately upstream of the fault, without causing the unnecessary operation of protective
devices further upstream.
Protective devices should be rated to withstand the anticipated fault current to ensure a fault
does not cause detrimental effect to the distribution system. Final circuits throughout shall be
protected using residual-current circuit breakers (RCBO’s) for both lighting and small power
circuits. Circuits that will not have RCD protection are security, fire detection and electronic
door lock/access equipment.
RCBO's shall occupy one distribution board way space.
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6.2
Small Power & Lighting Installation
The contractor shall design, coordinate, procure, install, set to work and commission a
complete small power installation in line with the provision outlined on the drawings and to suit
the requirements of all systems to be detailed as part of the contractor design. Generally small
power outlets shall be located as per the interior designers setting out drawings and in
accordance with Part M of the building regulations. Socket outlet finishes are to be as per the
visual services schedule.
Generally, the installation will be flush, with containment concealed within voids or recessed
into the fabric of the building. All small power circuit cabling will be 6242b LS0H twin and earth
cables.
Fixed equipment shall generally be served by dedicated fused connection units (FCU) or local
isolating switches. FCU’s shall be arranged for flex outlet or direct rear entry connection to suit
the required equipment.
Kitchen appliances shall have etched labelled switched isolators with unswitched sockets at
low level. Electrical fittings should be located at least 300mm (measured horizontally) from the
edge of a cooker/hob/grill to avoid the hot zone. This also applies to sink units.
Power points shall not be provided on the same electrical circuit as the cooker supply.
6.3
Lighting Installation
The general LV power installation for the apartment will comprise of new socket outlets, fused
connection units, isolators, cable trunking, conduit, wiring, and all other equipment and
accessories as applicable and necessary to provide a complete system.
The installation of lighting will comprise of luminaires, lamps, switches, conduit, wiring, fixings,
supports and all necessary equipment and accessories.
Conduit and trunking systems will be installed in accordance with BS 7671 and manufacturer’s
recommendations.
Outlets (e.g., 13A sockets, 5A lighting sockets and IT/AV outlets) will be provided throughout
the apartment in coordination with the Interior Designer and Interior Architect.
Floor boxes will be provided where suitable wall space is not available. The number and
combination of outlets within any particular floor box will be dependent upon what the floor box
serves.
All wall mounted socket outlets within the apartments will be flush mounted and the cables will
be installed concealed within the building fabric.
Lighting final radial circuits will generally consist of flat twin and earth LS0H Cu cabling clipped
within wall and ceiling voids.
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General small power circuits will be wired in ring circuits and shall be protected with RCBO’s
located within the consumer unit.
The small power ring circuits will generally consist of flat twin and earth LS0H Cu cabling
clipped within wall and ceiling voids.
Small power ring circuits will generally be protected with 32 Amp type ‘B’ RCBO’s protected at
the consumer unit and a minimum cross-sectional area of 2.5mm2.
6.3.1 Design Parameters
6.3.2 System Description
6.3.3 Control Requirements
6.4
Earthing/Bonding and Lightning Protection
6.4.1 Objectives
6.4.2 Design Parameters
6.4.3 System Description
6.4.4 Control Requirements
6.5
Telecommunications
6.5.1 Objectives
6.5.2 Design Parameters
6.5.3 System Description
6.5.4 Control Requirements
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6.6
TV Terrestrial and Satellite System
6.6.1 Objectives
6.6.2 Design Parameters
6.6.3 System Description
6.6.4 Control Requirements
6.7
Access Control System
6.7.1 Objectives
6.7.2 Design Parameters
6.7.3 System Description
6.7.4 Control Requirements
6.8
Fire Alarm & AOV Systems
LD1 coverage will be provided to the apartment.
6.8.1 System Description
6.8.2 Control Requirements
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