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Electrical engineer CDR sample

Career Episode 2 on CDR Sample for Electrical Engineer


Time duration March 2016 April 2017
Location Jazan KSA
Organization Al- Hayat National Hospital Jazan Al- Inma Medical Services Company www.alinmagroup.com
Project Design & Installation of Addressable Fire Alarm System for Al-Hayat National Hospital Jazan
Position Project Engineer (Fire Alarm System Design & Installation)

This career episode is about my project named “Design & Installation of Addressable Fire Alarm System for Al-Hayat National Hospital Jazan’’

[CE 2.1]

Al-Inma Medical Services is the well renowned healthcare service providing company in Kingdom of Saudi Arabia. The Company’s head office operates in Capital City Riyadh and is committed to provide state of the art health care facilities to its patients. The company also promotes the program to maintain and upgrade all of its facilities in Jazan, Riyadh, Khamis and Al Qaseem region respectively, whereas Facility Management - Engineering and Safety has been the most established department dealing with Electrical, Electro – Mechanical and Weak Current Electronics Systems planned and implemented by skilled specialized engineers and consultants.

Al Hayat National Hospital Jazan has been established to provide state of the art health care facilities to local Jazan residents and suburban community, as the region has been under development since then and limited healthcare facilities have been available. I joined Al Inma Medical Services Company in March 2014. I have designed and accomplish multiple projects in Electrical System, Electrical Controls and Low Current Electronics Systems such as Addressable Fire Alarm System Design & Installations, CCTV Surveillance System Design & Installations, Nurse Calling and Paging System etc.


[CE 2.2]

This career episode is related to the Design Implementation and Installation of Addressable Fire Alarm System. The project was executed keeping in view the various safety concerned for 200 Beds Multi-Storied Hospital Building under the guide lines of Civil Defense, NFPA and IEEE standards for Fire Alarm Systems. Keeping in view - one of the major Disaster in the history of Saudi Arabia which happened in Jazan General Hospital on 25th December 2015 and claimed the lives of 24 people, a deadly blaze broke out; in a matter of minutes the smoke spread out throughout the facility injuring at least 84 staff & patients. While the investigations have been carried out the main reason has been found due to defects in Fire Alarm System and poor smoke management system which cause the spread of smoke in the facility and caused suffocation among the people.

Immediately after the incident, special steps were taken by the Ministry of Health & Civil Defense of Saudi Arabia in to guarantee the security of staff and patients employed in the Healthcare facilities. To meet the standards of Civil Defense (and to acquire the safety license as per new guide lines) I have been assigned the project for the enterprise and setting up of fully automated fire alarm system.

[CE 2.3]


The prime aim of the project was to design an efficient, reliable, cost effective and multifunctional (Full Automated) Addressable Fire Alarm System for Al Hayat National Hospital Jazan. Previously the old system was Conventional Type along with multiple loops with un-balanced number of Detectors (Smoke & Heat), the system was very hard to trouble shoot secondly no location was identified suppose if the smoke broke out in one patient room the alarm will be triggered all over the facility, but it will be very difficult to trace the location in a huge building which can cause a major internal disaster and compromises the safety of the building.

I proposed a totally robust system which has been implemented across the world class facilities and suggested to upgrade the Conventional system into Programmable Fire Alarm System. So that all the locations can be programmed in the main control panel upon triggering the location will be pin pointed exactly so one can reach and access the location in no time which will reduce any un-expected disaster while the smoke management system (Pressurize Stair Case) will work in parallel with the Fair Alarm System.

[CE 2.4]

The hierarchy for the project is displayed below -

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[CE 2.5]

My Roles & Responsibilities were -

  • Complete study of various safety parameters, requirements, risk assessment, conditions and options available for the implementation of efficient, cost effective and reliable Addressable Fire Alarm System.
  • I carried out general site visits on various critical locations of the facility with Chief Operating Officer to identify the possible issues in case of any blaze.
  • I acquired the complete strategy of the building from Maintenance Manager for all the floors including the ancillary and utility buildings around the premises in-order to make estimation in regard with the total number of devices needed for the purpose including the cost estimation of the whole system along with 5 – Years cost of maintenance.
  • After days of brain storming, research activities and studying various type of system available in the market and conducting site visits with my technical team I proposed the installation of SIMPLEX Addressable Fire Alarm System (4100 ES - Made in USA) along with complete programming kit.
  • The system was entirely reliable with each detector / device that has been provided with a specific 8 – bit address code changeable at the back of Detector Base. The system has multiple electronic control cards compatible with loop control cards installed as per the requirements. Signal Transmission and Receiving takes place in designated loops through all the devices. In- case if any device triggers (Smoke or Fire Detected) the Fire Alarm Control Panel will alarm in the defined zone and the designated location / area will appear on the display screen of Main Control Panel along with repeater Panels until Re-Set.
  • I further contacted various vendors and suppliers for the availability of current system by acquiring quotations and comparing the type of systems with minimum cost and ease of trouble shooting solutions, submission of purchase order and completion of financial issues to receive the equipment in minimum time.
  • I prepared block diagram of our system and submitted it to higher authorities for confirmation. I further prepared Single Line Diagram over AutoCAD along with specified floor plans for every floor of the facility. I further used Building Information Modeling software such as Autodesk REVIT – MEP for scheming the extended areas of Hospital Building.
  • I performed loop cable estimations and cable routings while I proposed heat resistive and shielded cable.
  • I personally inspected and supervised the installation of Fire Alarm System along with my team members including Programming, Testing & commissioning of the complete system.

[CE 2.6]

Elevator Integration

During an event of Fire, it is highly recommended not to use the Elevators which can cause death due to suffocation due to any expected breakdown or smoke enters the elevator shell. But how to evade this situation in case someone is using the elevator? If fire break out at the same time. Different control options were provided by manufactures so I ordered fire safety control cards to be fitted and programmed the Elevator by Mitsubishi (Manufacturer).

Final Solution:

I integrated the control card with Fire Alarm System’s addressable control module. When the Fire Alarm will trigger immediately the signal will reach the NO control Module which will return to NC immediately giving the signal to the elevator (As a result the elevator will cancel its operational movement immediately reach the ground floor the door will remain open and the power will shut down till the alarm will reset.

Design of Automatic 24 VDC Control Panels for HVAC & Pressurize Stair Case System

Effect of problem: In an occasion of Fire, the smoke travel via duct network and spreads various slices of the facility. I found that there were no smoke dampers & fire dampers fitted in the Duct Network which can cause disaster.

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Root Cause of Problem:

This was indeed a major concern as no BMS System has been fitted in the Facility for the automaton purpose and all the Air is directed in-side the facility as fresh oxygen supply which can be a fuel for any un expected fire and can let the smoke travel through the facility.

Final Solution:

I deigned a relay based automated 24 VDC FAHU Shut Down System which controlled all the FHUS automatically and was integrated with the main power distribution Panel of the FAHU’s, in-case when the Fire will trigger, it will proximately shut down the Fresh Air Supply to the Hospital saving the spread of smoke and cut of fresh air oxygen supply to the hospital. The same circuit has been realized for various utilities such as: Stair Case Pressurized System Control, Magnetic Door Lock Control etc.

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Electronic Flow Switches

To enhance the complete safety system electronic flow switches were added beside each main valve of Main Fire Fighting Pipe line (This part was covered along with mechanical engineering division). In case if the pressure will fall which will trigger the flow switch and the mechanical fault will be recognized in the main panel.

[CE 2.7]

I designed the system with following functionality dealing with various entities involved in the design of the project:

  • Configuration & Installation of Programmable Addressable Control Panel (Wide LCD Display)
  • Installation of addressable Smoke, Heat Detectors and Manual Call Points in Various Loops
  • Installation of Repeater Panels on 03 Floors of the Building with Narrow LCD Display
  • Magnetic Door Locks Automation with Installations (Buzzer Provided)
  • Automation of Elevators with Fire Alarm System
  • Automation of Fresh Air Handling Unit System Shut Down Control System
  • Installation of Electronic Flow Switches beside the zone valves of Fire Hydrant Main Line on each floor (In-case of No Pressure Mechanical Fault will be identified in the System)Automation of Pressurized Stair Case System

The system will ensure complete operating safety and multiple options to facilitate the smooth operations of building.

[CE 2.8]

I computed required quantity of all the devices & sensors required by following NFPA guide Lines including the spacing between each device as per the guide lines mentioned

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I computed the Voltage Drop Calculations for Notification Appliance Circuit (NAC). By using these parameters, I calculated total alarm announcement device amperage. And then the total voltage drops in each branch circuit. A per NFPA Guide Lines if the branch Circuit Voltage Drops exceeds 4.4 VDC it will not be compatible with the standard as it can consume the battery life in – no time. Following is the example for a Branch Circuit: Wire Length (From Main Panel to End of Circuit = 200 Ft X 2 (Trans / Receive) = 400 Ft Used Wire Size = # 16 AWG [BELDED SHEILEDED MULTI CONDUCTOR CABLE] OHMS / Ft = 1 / 1000 Ft = 0.4 OHMS / FT Circuit Resistance (R)= 440 ft X 0.44 OHMS / FT = 160 OHMS Total Alarm-Appliance-Amperage = No. of Appliance X Current Amperage Each = 23 mA Voltage Drop (E) = 23 m (A) X 160 (OHM) = 3.68 V (Should Not Exceed 4.4 V) Voltage Drop (V) = 20.4 V – (E) = 17 V [Should Not be Less Than 16 V]

Keeping in view of above criteria all the devices in each loop has been balanced.Further More, I created the Detector / Sensor Profile sheet over MS Excel in-order to display the actual Location which will be programmed in the Main Control Panel for each device, as each constituent of the circuit has designated address and it cannot exceed 40 digits as maximum limit.

Design of Facility Layout:

I designed the Fire Alarm System Floor Plan for every floor of the facility indicating the Specific Identification Number of each Detector and the placement along with the updated name for each location. I have used a separate color scheme / layer to separate each loop along with loop numbers.

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The design ensures complete safety, reliability and superiority of operations based upon international standards.

[CE 2.9]

I prepared the block diagram of the scheme and implemented complete single line Diagram on AutoCAD software. I prepared the complete design & Schedule Booklet to be acquiesced to my COO to be submitted to the assessed by Governmental Authorities such as MOH and CIVIL DEFENSE Authorities.

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[CE 2.10]

I followed the safety manual for all the project work and these activities were carried out by trained workers resulting in no Safety issues or Environmental effects from this project. Adequate briefing sessions were given to the labor before starting any activity; discussing the safety aspects to be taken care while carrying the work, brief discussion on the standard procedure to carry out the work. Also indicated safety parameters, over current protection, Earth leakages Protection, and Earthing & Ground System and voltage drop computations.

[CE 2.11]

Weekly I arranged meeting discussing status of the upcoming works, remaining clearances and resources allocation along with taking a gist of the previous completed works and made sure that papers were prepared and submitted to the concerned authorities to get the completion certificate. I used Electronic Work Bench Simulator, Revit – MEP, AutoCAD, MS Word, MS Power Point software in this project. I implemented various formulas over MS Excel I.e. (Quantity Computations, Cable Size Computations, Voltage Drop Computations) for my own convenience and ease of the project.

[CE 2.12]


The project was major success in my career and the efforts have been much appreciated by my sub-ordinates and team members after the successful implementation. I achieved major design goals and challenges that occur during the design and fixing of efficient and reliable Fire Alarm System. As a result, the Hospital secured the License from Civil Defense ensuring that the facility is totally safe for the staff and patients.

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