ELECTRICAL DESIGN CRITERIA (POWER AND COMUNICATION)
A- ELECTRICAL POWER & LIGHTING DESIGN CRITERIA
1. General 1.1 Introduction
This section describes the basic design guidelines that will be used in preparing the electrical design and documents for JIZAN MEDICAL CENTER in JIZAN. The medical center is part of a campus with one infra-structure.
The campus shall have a main power supply from the Saudi Electricity Company SEC. For a campus of this size SEC usual builds a transformer station to transform power supply from 132 KV to 13.8 KV. SEC usually asks for a piece of LAND around 50x60m to put the transformers and equipment at that location. The medical campus shall have its own 13.8 kV main substation to distribute the 13.8 kV power to all buildings in the campus. It is recommended to keep the low
voltage as a unified voltage in all buildings 380/220 V 3phase, 60 Hz. This is in line with the trend in Saudi Arabia.
1.2 Scope of Work
The electrical systems for this building shall consist of the following items including all the necessary raceway:
•
Main power distribution including substations, transformers, boards. etc.•
Generators and standby system, etc.•
General Lighting for Indoor and Outdoor•
General Power for Indoor and Outdoor•
Grounding System•
Lightning Protection System•
Un-interruptible Power Supply (UPS) for computer server•
Isolated Power System.•
Audio-visual system.The communication, security and control systems are covered in section "B- COMUNICATION, SECURITY AND CONTROL" of this report
1.3 Codes and Design Standard
The SAUDI ARABIAN STANDARD ORGANIZATION (SASO) is the official standard organization of Saudi Arabia. SASO is adopting the different standards of International Electro technical Committee (IEC) and translate them into ARABIC after minor modification.
Based on the above Saudi National Standard Policy; All the Electrical systems shall follow the following main standards:
•
SASO Saudi Arabian Standard organization•
IEC International Electro technical Commission (SASO is based on IEC)•
Other standards and codes can be used in areas not covered by SASO/IEC.
These other standards include:
−
BS British Standard including IEE Wiring regulation−
NEC, NFPA and other American standards•
Civil Defense Department (Local Authority) requirement and instruction are
mandatory.
Material Selection Standard
•
All electrical products specified for this building shall be specified according to one ofthe following standards as per sequence:
−
SASO Saudi Arabian Standard Organization−
IECInternational Electrical Commission
−
Other Europeans standards like EN, BS, DIN, etc.−
Other American Standards Like ANSI, NEMA, ASTM and IEEE•
The electrical products used in this building shall be tested and approved to meet theapplicable standards by one of the independent test laboratories (or approving
agencies) including: SASO, IEC, BS, ASTA, KEMA or UL or similar agencies.
Following specialized standards shall be used:
• Lighting System shall be as per IES -Illuminating Engineering Society 9TH Edition 2000.
• Health Care Facility Handbook (based on NFPA 99) for general guidelines of hospital system design
1.4 Environmental Conditions
The ambient temperature to be used for calculation purposes is tabulated as follows:
Description
Ambient Temperature For
Derating Purposes
Deg. C
CABLES
•
Directly buried or duct bank (min. 600 mm below
grade)
•
In conduit in ventilated area below grade 828b19i•
In conduit exposed to out side air or directly in air•
In conduit in conditioned space•
In cable tray or conduits above conditioned space35
45
50
30
45
EQUIPMENT
•
Well-ventilated building (no air condition )•
Air condition for equipment, substation, etc.•
Installed outdoors•
Air-conditioned for comfort, offices, etc.50
30
50
30
1.5 Utilization Voltage
The following table indicates the nominal system and standards utilization voltages for particular items of electrical network.
Service
System
Voltage
Volts
Remarks
Medium Voltage Supply
13800
Three phase
Low Voltage Supply
380/220
Three Phase
A/C System
380/220
Three Phase
Single Phase Motors
220
Single Phase
Indoor Lighting
220
Single Phase
Outdoor Lighting
220
Single Phase
General Purpose Outlets
220
Single Phase
Power Outlets
220
Single Phase
1.6 Voltage Drop
For calculation of voltage drop; the following rules shall be used: A maximum Total of 2% from the main supply intake position "transformer" to "Main Distribution Board" MDB.
A maximum Total of 3% from the Main Distribution Panel "MDP" to the farthest point of use shall be used. A maximum Total of 5% from the main supply intake position "transformer" to the farthest point of use shall not be exceeded.
1.7 Branch Circuits
The design shall be based upon the use of copper conductors of a minimum of 4 mm2.
16A and 20A (Ampere Trip) Circuit Breakers will be used for wiring of power and lighting branch circuits. Most of the circuit will use 20A, but for small loads like in guard house or similar cases, the 16 A can be used.
With derating for inside panel temperature, the 20A nominal Circuit breaker is only 17 A. By allowing 25% spare the 20A nominal circuit breaker shall be loaded to 13.6A
Separate lighting and power/receptacle circuits.
20 percent spare ways will be provided in lighting and/or receptacle panel boards. 1.8 Socket Outlets
General-purpose Receptacle outlets will be provided as required and shall be limited to eight per branch circuit. The general purpose receptacle shall be as per applicable standard SASO (13A). The general-purpose receptacles are in addition to the special purpose and dedicated outlets for specific equipment such as outlets
for computers, office equipment and other
Circuit loading shall be estimated on the basis of 180 VA for each outlet, unless specific conditions necessitate other loading.
All sockets outlets in wet areas, outside areas and kitchen shall be protected with earth leakage circuit breakers ELCB. The sockets in the outside shall also be weather-proof
Receptacle and plug configurations for the specified number of poles as per code and client requirement,
Each Local Area Network (LAN) workstation telecommunication outlet will be provided with a dedicated well-defined adjacent duplex receptacle on an independent single phase (220 volt) circuit having not more than four duplex receptacles and a non-shared neutral. Circuit Loading for LAN workstation shall be
Fax, copy equipment and laser printers will be provided with independent circuits.
1.9 Utilities Interface
This whole campus shall be connected to Saudi Electricity Company (SEC) power supply. Preliminary coordination with SEC shall be arranged during the design stage. Final and detail coordination shall be arranged by the contractor at the beginning of construction stage. The building owner shall take part in the
coordination. Power supply Contract can only be signed between SEC and building owner.
2. Electrical Systems and Equipment 2.1 Normal Power Supply and Distribution
Electrical supply shall be provided from the Saudi Electricity Company SEC at 13.8 kV via a transformer substation (132/13.8 kV). A space shall be allowed for SEC at the boundary along a main street (two streets). All the issue concerning the power supply shall be closely coordinated and agreed with SEC during the
design stage.
A 13.8 distribution switchgear, 13.8 kV cable network, transformers and complete low voltage distribution shall be designed as part of medical center property. The maintenance of these equipments shall be by the medical center maintenance staff (or contractor). This system will give the medical center flexibility to modify and
add any building at any time without asking SEC. Usually SEC charge the cost of the transformer substation on the project.
2.2 Electrical Load Requirement
The attached spread sheet indicates the preliminary load estimation.
The loads indicated are preliminary estimation for space allocation of electrical equipment and shall be adjusted according to the actual loads when it becomes available.
2.3 Transformers and RMU
Transformers of this project shall be both oil type for chillers and external areas and dry type resin encapsulated for inside the building.
The work shall include transformers and Medium Voltage Compartment Ring main units. The RMU shall be SF6 insulated, non-extensible with two- (2) load break switches and one transformer circuit breaker. All other auxiliary component shall be included. Ratings shall be as required and indicated on the drawings.
Transformer Specifications for external oil type 1) Type Distribution (120º C rise minimum oil type)
2) Ventilation Natural cooling 3) Phase Three (3)
4) Temperature 65 deg c rise over a 50 deg c ambient 5) Frequency 60 hertz
6) Bil 95 kV
7) Taps Two 2-1/2% primary above and two 2-1/2 % primary below 8) Core Five - legged
9) Primary voltage 13,800V 10) Secondary voltage as indicated on drawings
For 380/220v system transformer shall have 400/231V at NO-LOAD
11) KVA ratings as required in the drawings 12) LV neutral fully rated; solidly grounded
13) Impedance's 5.75 % 14) Noise level shall not exceed 67 db
15) Winding connections Delta - Star, Vector Group DYII Similar modified specification for dry type shall be used
2.4 Essential (Standby) Power Supply
Standby generators will be installed to provide power supplies for the essential loads in case the main power supply fails. A generator room will be provided in a suitable location and shall be coordinated with the architect.
Diesel Engine driven generator sets shall be provided as standby power. Automatic transfer switch shall automatically start the generator. For the medical center a complete diesel power generation plant with synchronization. The standby generation is about 60 to 70% of normal load
The following are the minimum emergency loads to be connected to standby generator:
•
CARDIOGRAGRAPH•
ICU and CCU.•
All diagnostic and treatment areas (X-ray, laboratories, etc.).•
Operating Theaters.•
Outpatient clinics and emergency department.•
Refrigeration Equipment and selected kitchen equipment.•
Fire pumps.•
Utility pumps.•
All exit and stair fixtures.•
Communication systems.•
Security system.•
Selected fixtures in corridors, lobbies, offices and conference rooms.•
Around 30% of the general lighting•
UPS systems.•
Selected HVAC equipment. (as required by HVAC)•
Selected Elevators•
Any other equipment recommended by the medical specialist2.5 Building Electrical Distribution
Power supply for the building shall be split into essential and non essential loads. The essential load will be connected to the standby generators. For hospital in particular we shall use 3 load categories:
• Emergency system including: o Critical Load o life Safety Loads
• Essential Equipment
• Standard (Nonessential Loads)
Bus bar trunking (busway) shall be used in the riser to reduce space requirement and increase reliability. Inside the building cables shall be installed in metal cable tray and EMT conduit.
Wiring to final branch circuits shall run in small busway, EMT conduit.
2.6 Panel Boards and Motor Control
Main Distribution Boards (MDB), Distribution Boards (DB), power and lighting panel boards shall be circuit breaker equipped, dead front construction, complying with SASO 1609/ IEC 60439. Circuit breaker shall be molded case bolted type. Multi-pole breakers shall have common trip with single operating handle.
All distribution, power and lighting board shall be of Type Tested Assemblies (TTA) as defined in SASO 1609 / IEC 439.
Lighting and appliance branch circuit panel boards shall be circuit breaker equipped, complying with minimum short circuit and interrupting capacity of 10% more than the calculated maximum short circuit on the protected circuit and shall not be less than 10 kA. Breaker trip ratings shall be as required.
Motor control shall comply with requirements of SASO/ IEC. All items shall be for 60 Hz.
Branch circuit panel boards shall be of the circuit breaker type. Feeder, distribution, and sub-station panel boards shall be current limiting circuit breaker. A main circuit breaker or disconnect shall be provided on all panel boards when two or more panel boards are supplied from the same feeder. All panel boards shall be
provided with insulated neutral terminals and equipment grounding terminals.
Supplying small single-phase loads from power and distribution panels shall be avoided. Large three phase loads shall not be fed from lighting panels. Lighting and small panel boards may be combined for small facilities, but shall generally be segregated for larger facilities.
The location of panel boards shall be coordinated with architectural drawings to assure cabinet mounting is correct for the location and wall type. Panel location shall provide for economical distribution of branch circuit conductors and minimum voltage drop.
Spare circuits and spaces in power and distribution panel boards shall be provided at 25 percent of active circuits. The spare circuits shall be included when applying demand loads for feeder, panel, and transformer sizing. For panel boards recessed in finished wall spaces, spare circuits shall be called out to be provided
from a panel boards to overhead accessible areas for the spare circuits.
All electrical equipment, including switchboards, panel boards, controllers, metering cabinets, transformers and special equipment shall be housed within enclosures with the correct IP rating.
ISOLATED POWER Panel Boards:
Isolated Power panel boards shall be installed for critical medical areas and equipment like OR, ICU, CCU and any area where medical equipment are attached to the human body.
The isolated power panel boards are specially designed panel for this purpose and shall include as minimum:
• Shielded low-leakage isolating transformer, specifically manufactured for the use in hospital isolated systems
• Line isolating monitor (LIM)
• Circuit breakers
• Remote alarm indicator.
2.7 Switches, Circuit Breakers and Fuses Safety Switches
Safety switches shall be according to IEC 60947-3. All Motor safety switches shall be rated for category AC-3 (motor duty) according to IEC 60947-3. The switches of 60 ampere and below shall be general-purpose, with pilot light if required, and ratings as indicated on the drawings. Safety switches above 60 A
•
IP-20 (NEMA1) general-purpose enclosure for indoor use, with metal
nameplates, front cover mounted that contain switch type, catalogue number
and hp rating.
•
IP-65 (NEMA 4X) type will be used for outdoor use.Molded Case Circuit Breakers (MCB and MCCB)
•
All MCB shall be manufactured according to SASO 1349, IEC 60898 and/or
IEC 60947-1 and 2.
•
MCCB Breakers up to 630 AMPS shall be of category A with a rated service
breaking capacity (Ics) equal to the ultimate breaking capacity (Icu) - on all the
operational voltage range
•
MCCB in the range of 100A to 250 A shall have adjustable thermal magnetic.Bigger sizes shall have universal electronic protection units.
•
All MCCB bigger than 630 A shall have electronic trip unit with the following
minimum functions:
•
Long-time protection with an adjustable current setting and time delay•
Short-time protection with an adjustable pick-up and time delay•
Instantaneous protection adjustable up to 15 times the rated current with
an OFF position
•
Earth-fault protection (if required) with an adjustable pick-up and time
delay
•
All the molded-case circuit breakers shall be current-limiting circuit breakers•
The rated ultimate breaking capacity (Icu) of each molded-case circuit breakershall be equal to at least the value of the short-circuit current (Isc) at the point
of installation on the electric circuit, unless the upstream circuit breaker makes
it possible to ensure coordination (as defined in Appendix A of IEC 60947-2);
in this case, the coordination between the two circuit breakers shall be
confirmed and guaranteed by tests.
AIR CIRCUIT BREAKERS (POWER CIRCUIT BREAKERS)
•
For Electrical loads bigger than 1600 A or as required Air circuit breaker shallbe used.
•
Power circuit breakers shall comply with standards IEC 60947-1 and 2 or
standards derived from the latter.
•
ACB shall be withdrawable•
ACB shall have a microprocessor based electronic trip unit. Trip units shall
allow all type of protection, metering, energy metering and communication.
Ordinary Low-Voltage Fuses
Cartridge types, one - time use and shall be according to IEC. They shall have markings, or adjacent to them an identification of the type of links to be used.
Each motor shall be provided with a heavy - duty disconnection means. The rating shall be for category AC-3 (motors) as per IEC 60947-3.
2.8 Wires and Cables
Branch circuit wires shall consist of moisture and heat resistant thermoplastic (PVC), 85 Deg C, 750 V copper conductors according to SASO 55 and IEC 228. Feeders for indoor and outdoor installations shall be XLPE, 90 Deg c, 1000 v copper conductor multi-core or single-core type.
All wires 2.5 mm2 and above shall be stranded conductors. Stranding shall be circular none compacted according to IEC 228 class 2, or approved equivalent. The wiring will be installed in a system of trunking, trays and conduits.
A separate green/yellow colored grounding conductor shall be used throughout to insure grounding continuity. Aluminum conductors will not be used in the construction of this facility only copper conductors will be used.
Feeder circuits shall be run in cable tray, rigid conduit, intermediate metal conduit, or electrical metallic tubing except where large loads justify the use of enclosed bus bars.
Feeders shall be derated for high ambient temperature where required. General routing of main feeders shall be shown on the drawings where required for purposes of construction.
Wiring methods and materials shall be those recognized by the SASO, IEC, BS and NEC, except as modified below. All interior power, lighting, and line voltage control conductors shall be run in raceways, except where cable tray systems are used. Low voltage and temperature control wiring shall be encased in conduit
where the run is exposed.
MV cables shall be 15 kV 3 cores with armor if installed direct in ground. For installation in duct-bank no armor is required.
2.9 Man-holes/Hand-holes
If required, man-holes/Han-dholes shall be of the cast-in-place type. Straight runs between manholes shall not exceed 150 meters. Shorter distances will be used when change in direction is required. Hand-holes will be mainly used for communication systems.
2.10 Earthing and Safety
The Earthing system shall be according to SASO 981, 982, 983, 984, etc. equivalent to different parts of IEC 60364 Part 1, 4, 5, 6 and 7 (all parts) SASO
IEC 60364-5-54 is particularly for earthing. Earthing wires shall be sized accordingly. Earthing system shall be TN-S according to SASO 981 equivalent to IEC 60364-1
For ICU, CCU Operation Theater an isolated Power system shall be used to increase the reliability of the system
Ground cables: soft drawn, bare stranded copper wire, tinned, or insulated stranded copper wire conductor cables. The minimum cross-sectional area of protective conductor shall be according to table 54.3 of IEC 60364-5-54 and in no case smaller than 2.5 mm2
Ground rods: copper cladded steel rod or copper alloy, 19-mm diameter, furnished in 3.00-m lengths. A separate grounding conductor will be provided for each circuit in all building lighting and power conduits.
2.11 Conduits and Raceways Interior Raceways
•
Raceways for wires and cables inside the buildings shall be conduit and a
system of trunking and cable tray.
•
All conduit runs above ceilings or inside double wall partitions shall be electricalmetallic tubing (EMT). Exposed conduit inside the building (subject to
mechanical damage) shall be rigid galvanized steel conduits. Rigid PVC
conduits will be used when embedded in concrete.
•
Minimum sizes of conduits for interior installation shall be 20-mm diameter.•
Electrical metallic tubing shall not be installed below grade, where subject to
corrosive conditions, or where embedded in concrete.
Exterior Raceways
•
External power raceways shall run through services tunnel then duct bank to
access the building.
•
Lighting raceways for exterior use shall be in rigid PVC conduits/duct banks.
Raceways under traffic areas shall be rigid UPVC conduit, schedule 80,
furnished in 6 meter lengths with one bell end per length, rated for 90 Deg. C
cables, and encased in concrete.
•
Minimum sizes of conduits for exterior installation shall be 25-mm diameter.•
Separate duct sections shall be provided for power and telephone systems.•
Raceway shall be used if needed as per drawing.2.12 Lighting
2.12.1 Interior Lighting System
The interior lighting of the main public area shall be emphasized to create special architectural effect and attraction. The architect shall develop the main concept of the interior (decorative) lighting
For offices and general areas; energy efficient design considerations shall include use of efficient lamps and luminaries. The most energy efficient lamps and fixtures shall be used.
Fluorescent lamps will be cool white, energy saving types (T5) 16 mm diameter. These lamps are the most modern and energy efficient in the market. Louvers shall energy saving aluminum louvers
Electronic Control gear (ECG) with dimmable function shall be used.
The buildings are designed by the architect to make use of the natural day lighting. This concept requires the use of some control to reduce or switch off the lighting luminaries based on the day lighting available. The energy saving comes from this control.
That is why a lighting control system like EIB (European Intelligent Bus) is recommended in connection of day light sensors, presence sensor and dimmable ECG shall be used.
Lighting fixtures will generally be rated for 220-Volt operation
2.12.2 Interior Illumination Levels
For offices, class rooms, laboratories and service areas; illumination level shall follow the recommendation of IES Illuminating Engineering Society Lighting Handbook 8th edition.
Lighting Criteria table
The illumination level (LUX) in this table represents average illumination. The calculation shall
target these values (+) or (-) 10%. Architectural symmetry and interior designer requirement shall be
considered
ROOM (AREA)
DESCRIPTION
LUX
Remarks
Lobby
200
Corridor
300
Staff Rooms
500
Staff office
200
Rest or waiting room
200
Toilet
200
Change
200
Entrance
300
Prayer room
300
Electrical room
500
Communication room
500
Meeting room
200
Reception
500
Class room
150
Janitor
200
Toilet/shower
500
Training
500
Lecturer
300
Filling/Printing
200
Disinfector
50
Parking
300
Transformer room
200
MEDICAL AREAS
Operation room
1000
Recovery room
250
Treatment room
300
Medical Library
500
Laboratory
500
Examination
500
Consultant room
500
Intensive Care
500
Patient room
100
X-Ray Film handling
150
Pharmacy
500
Medical Preparation
500
Intensive Care
500
Scanners
500
Deputy Doc
200
Medical work shop
500
Sterilizers
500
Blood bank
500
Auditorium
500
Store
150
VIP Treatment
500
External Lighting
Roads major, collector, local
13, 9, 7
HPS
Parking (covered)
50
Fluorescent
External parking
15
HPS
2.12.3 Street and Area Lighting
External Lighting (road and area lighting) will be coordinated with the architect and landscape design. Lighting control will be achieved by orbit timer, photoelectric cells and contactactors. Manual option shall be provided. EIB shall be used for control
3. Special Systems 3.1 Lightning Protection System
The work under this section shall consist of furnishing and installation of a complete lightning protection system for the building of the air terminal type. Air terminal type material and components will comply with BS 6651, in accordance with published product information. The system will be provided with air
termination network, bonding plates, conductors, connectors, conductor straps, fasteners, grounding plates, grounding rods, rod clamps, splices and other components required for a complete system. High conductivity annealed copper tape 20 * 3 mm with rounded edges with bases. Length as indicated on the
drawings.
Conductors: High conductivity annealed bare stranded copper wires. Length and size as indicated on the drawings. Roof conductors coursed along masonry surfaces shall be secured with copper masonry fasteners. Conductors coursed on the roof deck shall be secured with adhesive cable holders spaced as shown on
drawings. The download conductors shall be concealed and routed down in cavity walls or in PVC conduits concealed in concrete walls. Ground Rods: Each down conductor shall terminate at a ground rod, which is part of the common building ground grid. Ground rods shall be 20-mm diameter
(3/4"), 3.00-meter long copperbond steel rod. 3.2 Uninterruptible Power Supply (UPS)
UPS room shall be provided in the area of server and communication rooms. UPS shall be used to serve the critical hospital areas like:
• Operating rooms
• ICU room
• CCU rooms
The UPS shall be selected with the latest technology available to reduce the harmonic distortion and improve power factor. UPS shall be On-Line double conversion including Rectifier, Battery, Inverter, Automatic bypass and maintenance bypass.
The UPS shall meet the IEC 62040-X all parts, in addition to the following minimum requirements:
•
Transistorized PWM IGBT/intelligent power-module converter.•
Digital-signal processing (DSP) using PWM for direct-digital-control (DDC) of
all UPS control and monitoring functions.
•
Transistorized PWM IGBT intelligent inverter for output.•
UPS shall use open system communication for remote control and monitoringof all parameters. Ethernet TCP/IP shall be supported
UPS shall be sized to cover the following items:
•
The medical equipment requiring UPS (operating rooms, ICU, CCU)•
Computer servers.•
Communication servers•
IP telephony server and equipment.•
Communication rooms•
Main security controllers•
Public Address With Internal Broadcast System•
Fire Alarm System•
Closed Circuit Television Surveillance "CCTV" main consuleBUILDING MANAGEMENT SYSTEM "BMS"
4. Basis for Electrical Design and Calculations 4.1 General
Calculation shall be performed based on the standards and codes indicated in the section of codes and design standard.
The following standards in particular shall be observed
•
SASO 981, 982, 983, 984, etc. equivalent to different parts of IEC 60364 Part1, 4, 5, 6 and 7 (all parts).
•
IEC 60364-5-54 is particularly for earthing. Earthing wires shall be sized
accordingly.
4.2 Programs for Calculation
The following programs shall be used for calculation:
•
DOCwin from ABB•
Excel Spreadsheet for panel board and some calculation.•
Manufacturer programs for generator selection 4.3 Load estimation and calculationAll the loads in the building shall be tabulated in the panel load schedules. The following table of loads shall be used as a guideline.
It shall be noted that all panel boards, Main Distribution Board (MDB), Distribution Board (DB), Circuit Breakers and cables shall be selected with rating to allow for 20% spare and future growth. This 20% spare shall not be shown as a load in the panels but shall be considered when sizing the cables and selecting the circuit
Table for Equipment Loads and Power Factors
Note: This table shall be used only in case the exact manufacturer data are not available. If manufacturer selection and power requirement are available, then use power as per catalogue
Type pf load Demand LOAD VA PF
LAMPS
Incandescent and Halogen Lighting Fixtures Lamp Wattagex1 1.0 Fluorescent Fixture with magnetic Ballast Lamp Wattagex1.4
Fluorescent Fixture with HF electronic Ballast Lamp Wattagex1.1 0.90 Mercury Vapors Lamp Lamp Wattagex1.5
Metal Halide lamp Lamp Wattagex1.5 High and Low pressure sodium lamp Lamp Wattagex1.5
Socket Outlets
General Socket Outlets 180 .85
Power Outlets for specific equipment Manufacturer Catalog .8
Office Equipment
COPY MACHINE 1300 0.85
PRINTER 1200 0.85
FAX MACHINE 300 0.85
PC station (CPU+ Monitor) 300 0.85
LASER PLOTTER (FOR DRAWINGS) 1850
Scanner 200 0.85
Mechanical Equipment
Pumps and fans Manufacturer Catalog 0.8
Electric Water Heater Manufacturer Catalog 1.0 HVAC equipment (Chillers, AHU, PACKAGE) Manufacturer Catalogue 1.0
4.4 Demand loads
Demand Factor for this building shall be estimated based on the following
Table for Demand Load Factors
Type of load Demand Factor
Lighting Load 1
General Socket outlets 0.6
Computer Station Outlets 1 (based on 500VA Per a station outlet)
HVAC equipment 1
Small kitchen equipment (if more than 6) 0.75
B- COMUNICATION, SECURITY AND CONTROL
1- General 1.1 Introduction
This section describes the basic design guidelines that will be used in preparing the communication, security and control design and documents for this project. A modern system for communication, security and control shall be designed according to the latest trend in communication. All the main equipment, controllers
and systems shall have the capability to integrate with the other systems using open protocols and TCP/IP LAN 1.2 Scope of Work
The communication systems for this building shall consist of the following items including all the necessary raceway:
•
Data/Computer Cabling (Generic structured cabling system)•
Telephone System•
Public Address and Internal Broadcast System•
Master Antenna Television System (MATV)•
Clock System•
Security System•
Closed Circuit Television Surveillance System CCTV•
Access control system•
Vehicle control and gate barrier system.•
Building Management System (BMS)•
Nurse calling system integrated with paging system. (Doctor's call system).•
Digital Discussion & conference system.Note that UPS has been included as part of the power and lighting report. 1.3 Codes and Design Standard
Fire Alarm System
•
The application shall be according to the (Fire Protection Requirementsfor buildings) agreed by the Gulf Cooperation council. The GCC
requirements are based on NFPA 101 (life Safety Code) with some
modification.
•
Detailed design shall follow the BS 5839 latest edition and/or NFPA 72(National Fire Alarm Code) latest edition
•
Fire alarm shall comply with the requirement of the local branch of thegeneral civil defense administration.
Telecommunications
•
Will be in accordance with ISO 11801 and TIA/EIA 568 A and according to
manufacturer recommendation
•
The following codes will also be applied to IP-PBX equipment and
characteristics:
•
ISO International Organization for Standardization•
ITU International Telecommunication Union2. Communication System
The building shall have a complete LAN system based on fiber optic and UTP CAT 6a cables using TCP/IP. All the communication system shall be based on the latest approved modern technologies available in the market.
2.1 Generic Cabling For Premises (Structured Cabling)
A complete structured cabling system shall be designed based on ISO/IEC 11801 2002 and EIA/TIA 568A, B. The system shall be universal and support telephone, data, video and others. The system shall support Ethernet as defined by IEEE 802.3 standard and shall be open to any new applications that require an ISO/IEC
11801.
Structured cabling system shall be installed, tested certified and guaranteed by an authorized supplier/contractor. The warranty shall provide performance guarantee for 20 years.
The system shall support 10 Giga speed (CAT 6A) component, and shall be configured in star configuration with full redundancy using fiber optic as back bone and UTP horizontal cable to each communication outlets
The system shall include, but not limited to:
•
Horizontal cabling (UTP)•
Telecommunication face plates and outlets•
Patch Panels•
Patch Cords and connection cords•
Backbone Cabling (Fiber optic)•
Voice Cabling•
Distribution Frames•
Equipment Racks•
Raceway and conduitAll the component of the structured cabling system shall meet the requirement of CAT 6a (E) as per ISO/IEC 11801 and EIA/TIA 568A, B. and shall meet the following minimum requirement:
Horizontal Cabling
The horizontal cabling shall be 4 pairs Unshielded Twisted Pairs (UTP) category 6a.
The cable shall have solid conductor of 0.55mm diameter. Cable shall be PVC insulated and twisted and shall be LSZH (low smoke Zero Halogen). Performance and twisting shall be guaranteed to meet or exceed the ISO/IEC 11801 standard
Each Telecommunication outlet shall have two cables in general
Fiber optic cables can be used for the horizontal cabling if the distances between telecommunication outlet and patch panel communication cabinet
Telecommunication Outlets (Faceplates)
As recommended by the ISO/IEC 11801 standard at least 2 RJ45 outlets per Telecommunication outlet
Telecommunication Outlet shall follow the furniture layout i.e. one telecommunication outlet for each workstation or for each 10 m2 of usable workspace where there is no recommendation or furniture layout.
Every office, clinic, patient room, class room, lab shall have a minimum of one Telecommunication outlet (one faceplate with 2 RJ45 outlets) Special communication requirement shall follow the medical equipment liayout
Telecommunication outlets shall be provided at proper location to allow the installation of Wireless Access Point, so that users can use their laptops and wireless devices to access information from any location in the hospital
The wall-mounted faceplate shall match the wiring devices finishes and shape and it shall accept modular type RJ45 outlets (2 or 4 as required)
Patch Panels
Copper patch panels must have 19" to fit in the standard 19" cabinet, rack or bay. Patch panels must be modular, and have RJ45 connectors. A typical 1HU high patch panel shall have 24 port modular snap-in RJ45 connectors
Performance and specification shall meet or exceed CAT 6a ISO/IEC 11801
The optical fiber patch panel must have 19" to fit in the standard 19" cabinet, rack or bay. The patch panel shall support the ST or SC connector type. All patch panels, patch cord and accessories shall be CAT 6a rated.
Backbone Cabling
The backbone cabling is used to connect distribution rooms or cabinets together. Tight-buffered multimode fiber optic cables 50/125 are usually used for backbone cabling. The cable shall support gigabit Ethernet. A minimum of 6 fibers shall be used for backbone cabling. Cable performance and distances covered shall meet
or exceed the standard requirement. Cables shall have LSZH (low smoke Zero Halogen) sheathing material that does not give off toxic fumes in case of fire. Cables in duct bank; outside the building; shall be dry construction i.e. with no gel content. The jacket material shall be waterproof LSZH
Single mode fiber optic cables shall be used to cover long distances in the Voice Cabling
To connect the PABX to the different floor distributor, the voice cabling between the PABX, MDF and floor distributor shall be multi-pair cables.
Raceway
The generic structured cabling system shall be installed using a system of hot dip galvanized cable tray and light duty metallic conduit (EMT) or other accepted conduit system.
The entire active component like switches, routers, servers, computer and software are not in the scope of work of this contract. The scope covers only the infra-structure for the DATA networks as defined above and as per standard ISO/IEC 11801 2002 and EIA/TIA 568A, B
2.3 TELEPHONE SYSTEM (IP-PBX)
A complete Private Automatic Branch Exchange (IP-PBX) shall be designed for this building. The IP-PBX shall be microprocessor based modular type. PABX shall allow the use of IP-telephones, SIP phones, Digital ISDN and analogue lines.
The PABX system shall include, but not limited to:
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IP-PBX Switching Equipment
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Operator's Console
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Main Distribution Frame (MDF)
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Power Supply and Backup Power
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Cables and Raceways up to MDF
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Local Operation and Maintenance (O&M) Port with TTY, Remote O&M
Port with Dial-up Modem
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Software package
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Auto Attendant and Voice Messaging System
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Power plant and Test Equipment
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Special Tools
The capacity of the PABX shall cover the entire telephone requirement as in the layout plan plus 20% spare for future expansions. Number of external line for the building shall be estimated as 15% of the PBX size to cover the entire requirement.
It should be noted the telephone wiring from the communication room to the each desktop will be the same CAT6 cables as described in the structure cabling. Back bone cabling for the telephone from the PABX to each floor can be multi core CAT3 telephone cables. This system allows the use of standard type of
2.4 Master Antenna Television Systems (MATV)
Inside the building, a completely wired MATV system will be provided. The MATV shall include, but not limited to, the following component:
•
All amplifiers and splitters as required•
All the coaxial cabling•
TV outlets in selected location•
The HEAD-END station shall be designed for around 12 channels and shall
allow for expansion by adding additional channel modules
The location for the TV outlets shall include; patient rooms, waiting areas, managers and directors offices, rest areas and any other location required by client.
2.5 Public Address
The PA shall provide paging, emergency broadcast, and praying announcement. A remote microphone shall be used for emergency broadcasts on group or all speaker systems. Emergency broadcasts shall have priority over other broadcasts.
The PA shall be combined with the voice evacuation system without violating the code.
The system will be provided in corridors and waiting areas, with the main control panel installed within the security room. The system shall consist of, but not limited to, the following:
•
Power amplifier unit•
Paging microphone•
Monitor unit•
Audio mixer•
Dynamic microphone•
Speaker selector unit•
Remote control unit•
Cassette deck•
Radio tuner•
Power control unit•
Terminal board•
Speakers•
Connecting wiring, cabinet, ventilating fans unit, and accessories.Equipment and components shall conform to the requirements of the applicable standard. All electronic components shall comply with the appropriate standards of manufacturer country. Electronic components shall be of types and ratings commonly available from stock of established commercial distributors.
The system will have the following features:
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The system will allow for zoning and general announcement.•
Ability to be connected to Telephone System.•
The ability to connect several microphones to access for general address or
zonal address.
2.6 Clock System
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The work under this section shall consist of furnishing and installation of a
complete central clock system.
•
Clocks will be installed as required in lobbies, waiting areas, rest rooms and asrequired by the client.
The system shall consist of, but not limited to, the following
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Master Timer Unit: The master clock shall have the capability to receive the
timing signals through different interfaces including GPS receiver and TCP/ IP.
The master clock shall incorporate an internal single generator, which shall set
the master timer to, the correct time with back-up battery.
•
Slave Clocks shall be distributed at each lecture hall, lobby, waiting area and
as required by client
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Surface-mounted with analogue indication type with a radius around 30 cm2.7 Fire Alarm System
Automatic fire detection is required by Civil Defense Department recommendation. The system shall be as following:
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The application shall be according to the (Fire Protection Requirements for
buildings) agreed by the Gulf Cooperation council. The GCC requirements are
based on NFPA 101 (life Safety Code) with some modification.
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Detailed design shall follow the BS 5839 latest edition and/or NFPA 72
(National Fire Alarm Code) latest edition
•
Fire alarm shall comply with the requirement of the local branch of the generalcivil defense administration.
•
A complete fire alarm system will be provided complying with BS 5839. This
system will be of the Analogue Soft Addressable Intelligent Type. System shall
provide individual address of analog soft alarm initiating devices and two alarm
levels (zone alarm & general alarm) of audible alarm. Alarms shall be initiated
from sprinkler system, analogue multi / individual optical smoke / heat sensors
and manual stations near exits with maximum spacing of 30 meters. Alarms
shall be sounded through electronic sounders.
•
The system will consist of fire alarm control panel, mimic panels, repeat
panel, interface units (transponders), smoke sensor, heat sensors, beam
sensor, multi sensors, electronic addressable sounders, sealed lead acid
batteries and battery charger.
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Fire alarm system will be linked with TCP/IP network to other Fire alarm paneland to central workstation.
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Combined smoke and heat smoke detectors will be installed in all general
habitable rooms. Other type of detectors shall be selected for rooms with
special application
•
Cables for fire alarm system will be as recommended by manufacturer of thesystem.
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Provision shall be made for alarm indication to remote point via telephone
network
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The system will be connected to corresponding fire protection or sprinkler
systems
•
Provision will be made to stop some or all HVAC supply fans in the event of
an alarm (refer to HVAC drawings) for respective zone only.
•
A master annunciator will be located in the security office to indicate from
which area an alarm originates.
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VOICE Evacuation system shall be designed for the fire alarm system. It shallbe combined with the public address system to reduce the cost. The system
shall be designed as voice evacuation first as per code and then it can be used
as a public address system.
•
System shall have the ability to integrate with other security system using
open protocol and TCP/IP LAN to make one integrated system
3. Security Systems
3.1 Closed Circuit Television Surveillance (CCTV) A modern Digital CCTV system shall be installed for this building
The Digital Video Recorder (DVR) of the building shall record the cameras based on program and events. The following areas shall be monitored:
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Main entrances of buildings•
Lobbies and elevator lobbies•
Any special secure areas•
Car parking areas entrance and exitsThe system shall consist of, but not limited to, the following
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Camera-
The camera specified here shall be designed to meet needs of industrial
applications. Two types of cameras for outside and inside shall be specified.
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The outside camera shall be housed in dust tight enclosure with removable
covers. The lens shall be auto iris totally enclosed within the housing and shall
have a shatter proof front window.
- Camera shall have 1/3 CCD with digital signal processor (DSP)
- Camera shall have minimum resolution of 480 TV lines
•
Video Monitor-
The monitors shall be racks mounted design. It shall be fully solid state except
for the cathode ray tube; controls shall include brightness, contrast, vertical and
horizontal hold.
•
Digital Video Recorder (DVR)-
The digital video recorders (DVR) shall be software based and shall use open
system architecture. It shall use industry standard PC technology with
WINDOWOS NT operating system (Industrial Server).
- The DVR shall support 2 monitors and a control monitor
- The DVR HARD DISK shall have a capacity sufficient to record all CAMERAS
at standard recording rate and sequence for 3 months.
•
Cables and Wires- Coaxial shielded copper cables running in 25-mm conduit between equipment.
3.2 Access Control System• The high security areas shall have secure doors with electronic card reader to limit the access to theses areas only for designated personnel.
• The Access control system shall include, but not limited to, the following:
o
Main Access control panelo
Door card readerso
Proximity cardso
Panic buttono
All necessary softwareo
Wiring and raceways• All the access control system shall be controlled and monitored from a master control station and shall be integrated with other security system (CCTV).
• System shall have the ability to integrate with other security system using open protocol and TCP/IP LAN to make one integrated system
4. Control
4.1 Building Management System (BMS)
A BMS system is needed to control and monitor the AIRCONDITION A/C equipment and other equipment.
•
The work consists of furnishing and installation of a building management
system to control and monitor electrical and mechanical equipment.
•
Installation would include all communication equipment's, cabling, etc. as
necessary to provide these functions.
•
BMS shall use open protocol, standard based protocols like LONWORKS or
BACnet
Following equipment shall be fully controlled by BMS:
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All air-conditioning units (Chillers and pumps•
Air handling units AHU.•
Motor drives for HVAC equipment...Following equipment shall be fully monitored by BMS and integrated with the BMS: