INDUSTRIAL TRAINEE PRESENTATIONCentral Engineering Consultancy Bureau

•Chamidu Mihiranga

•Helitha Silva

•Nipuna Weerakkody

INTRODUCTION

Projects Worked On… Accidental Service, Theatre Complex, ICU Building - North Colombo Teaching

Hospital, Ragama.

Proposed Building for Faculty of Graduate Studies, University of Colombo

Development of Dental Institute at Ward Place, Colombo 07

Prison Complex Eraminiyaya, Angunukolapelessa

Safari Park at Ridiyagama, Hambantota

STF Barracks building at Bauddhaloka Mawatha

Expansion of Premature Baby Unit (Phase 1, Stage 2) De Soyza Maternity Hospital, Colombo

Colombo District Secretariat Building, Narahenpita

Courts Complex at Galle

Proposed Studio at Univotec, Ratmalana

Auditorium in Kalutara Police Training School

Construction of Proposed Administrative Building Complex -Sethsiripaya Stage II

Married Doctors’ Quarters at Castle Street Maternity Hospital Colombo 08

Contributions… ASTC - North Colombo Teaching Hospital, Ragama

Performing power requirement calculations

Calculating required KVA value for the generator

Drawing schematic diagrams

Calculating the length and size of feeder cables

Preparing BOQ for the Bus Risers

Crosschecking the BOQ

Development of Dental Institute at Ward Place, Colombo 07 Inspecting the installation of bus risers

Inspecting the wiring arrangement

Inspecting the installation of telephone cables

Inspecting civil works

Contributions… Proposed Building for Faculty of Graduate Studies, University of

Colombo Inspecting the wiring arrangements ,conduit paths and other electrical installations

Inspecting civil works

Inspecting and testing the panel board

Filling measurement sheets by inspecting the progress of installations

Inspecting of the final testing and inspection of the project

Studying the procedure of handing over of a project

Proposed Studio at Univotec, Ratmalana Designing conduit layouts for the lights and ceiling fans

Designing conduit layouts for the socket outlets

Designing the data and telephone layouts

Drawing the single line diagrams of the project

Contributions… Colombo District Secretariat Building, Narahenpita

Inspecting the wiring arrangements ,conduit paths and other electrical installations

Designing and Supervising the construction of the transformer bay

Designing lighting arrangement of the auditorium

Designing a panel board for AHUs of the central AC system

Inspecting the installation of Audio system of the auditorium

Selecting down light fittings for the auditorium according to the architectural requirement

Guiding the placement of panel boards

Making quotations for down lights, step lights, solar street lamps etc.

Inspecting the placement of the solar street lamps of the building

Supervising electrical works

Inspecting civil works

Contributions… Safari Park at Ridiyagama, Hambantota

Referring architectural drawings of the project

Dormitory Type Staff Accommodation

Lighting calculations

Lighting design

Socket outlet layout

Maximum demand calculation

MCB selections

Cable selections

Single line diagrams

Married Doctors’ Quarters at Castle Hospital, Colombo Testing the overload protection of the water pumps Assisting in trouble shooting of the water pump control system

Contributions… Prison Complex Eraminiyaya, Angunukolapelessa

Dividing the loads into consumer units while balancing the three phases

Selecting suitable places for the consumer units

Dividing the total load of the consumer units in to sub circuits

Selecting MCBs for the sub circuits

Balancing the loads of the three phase consumer units

Drawing single line diagrams

Performing maximum demand calculations

STF Barracks building at Bauddhaloka Mawatha Inspecting the relevant wiring arrangements, cable trays and conduit

paths

Inspecting the main distribution board of the building

Site Visits and Inspections…

Proposed Building for Faculty of Graduate Studies, University of Colombo

Colombo District Secretariat Building, Narahenpita

Development of Dental Institute at Ward Place, Colombo 07

STF Barracks building at Bauddhaloka Mawatha

Married Doctors’ Quarters at Castle Street Maternity Hospital Colombo 08

Theories & ProceduresCase Study: Dormitory Type Staff Accommodation - Safari Park at Ridiyagama

Lighting Design

Utilization factor was taken from manufacturer catalogues by using calculated Room Index.

Maintenance factor was taken as 0.9

Theories & ProceduresCase Study: Dormitory Type Staff Accommodation - Safari Park at Ridiyagama

Socket outlets Design

Free socket outlet expected current

5A Socket outlet : 1 A

13A Socket outlet : 1 A

15A Socket outlet : 5 A

Diversity factors for fixed loads according to the application

MCB & RCCB selection

Generally MCB’s are loaded up to 60% of the rated current.

Maximum demand calculation

5% was allocated for the unforeseen loads

10% was allocated for the future expansion

Theories & ProceduresCase Study: Dormitory Type Staff Accommodation - Safari Park at Ridiyagama

Cable Selection (Considered Factors)

Method of Installation: Ducts, Conduits, Trunks, etc.

Cable Grouping

Operating Temperature

Cross Section

Cable Length

Current Carrying Capacity

Voltage Drop: <4%

Insulation: PVC, XLPE

Theories & ProceduresOther relavant topics

Lightning Protection

Surge protection system

IP standards

DIALUX Software

Network systems

Experience at CECB E&M Unit

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