High Rise Buildings require advanced System Design. Electrical System Design was done for a 10 storey building in Trivandrum. It included 2 floors for parking, 2 floors for Commercial purpose, 2 floors for Owner's Penthouse, and the remaining as residential apartments.

1. ELECTRICAL SYSTEM
DESIGN OF GARDEN
PROJECT AT BELHAVEN,
KOWDIAR
Presented by:
Nithya Susan Varghese
Guided by:
Prof M.K. Giridharan

2. Overview
Introduction
Proposed project
Connected Load
Calculation of Connected Load
Design of Distribution Board
Current Status and Work to be completed.
2

3. Electrical System Design
• Electrical system design is the design of electrical systems.
• Simple systems can be created by one person. Large systems require
large teams of people, simulation software and many paper and
electronic records.
• The design should assure proper functioning of the installation.
• The design should provide safety.
3

4. Electrical System Design For
High Rise Buildings
• High – rise buildings are buildings having 5 floors and above, or
having a height of 15m and above.
• They normally refer to occupancy for:
 General offices
 Commercial establishments
 Hotels /Condominiums
4

5. Design Concept
• For all building construction the owner must first have a
concept for the new design, and then the architect or
designer can produce a set of building plans.
• An electrical design goes through several important stages
or development.
• Every electrical design has unique requirements,
depending upon the scope of the project. The project
scope is determined by the customers’ requirements and
the type of structure.
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6. HIGH RISE BUILDING POWER SUPPLY
REQUIREMENTS:
1. General Lighting & Power
 light for general illumination, seeing tasks, decorative features, hallways and stairways, others
 power for appliances and office machines
2. Heating, Ventilation & Air-conditioning (HVAC) System
 air-conditioning for temperature control
 blowers and fans ventilation
 heaters for humidity control
3. Transport System
 elevators and escalators
 conveyors, dumbwaiters, others
4. Water Pumps
 potable and non-potable water supply
 water sprinkle (fire suppression)
 pumps / drainage
 sewage ejectors
5. Communication System
 PABX telephone system
 Intercom
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7. 6. Automatic Doors
 entrance and exit for pedestrians
 garage and freight
7. Central Computer System
 CPU and peripherals
 Terminals
8. Auxiliaries
 intrusion and hold-up control system
 fire fighting & alarm system
 background music and paging
 sound reinforcement and video facilities
 noise masking and acoustics, others
7

8. Proposed Project
• The proposed building “Garden Project” at Belhaven
Road, Kowdiar is a 10 storeyed building. It includes a
cellar for parking purpose, and 10 floors of which 2
floors are for commercial purpose, 1 for parking and
the remaining for residential purpose. It has a total
plinth area of 4948.34 sq. m.
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9. Site Plan
9

10. Section
10

11. Cellar
11

12. Ground
12

13. First Floor
13

14. Second Floor
14

15. Third Floor
15

16. Fourth Floor
16

17. Fifth Floor
17

18. Terrace Floor
18

19. Mezzanine
19

20. Machine Room
20

21. Connected Load
 DEFINITION :The sum of the continuous power
ratings of all load-consuming apparatus connected
to an electric power distribution system or any part
thereof.
 Connected load for electricity is the maximum
amount of wattage that is allocated to a building.
 Calculation of Connected Load is done by
engineers from the utility from which the
connection is taken.
21

22. Description Area of the residential building (sq-m)
35 45 55 85 140
Light points 7 8 10 12 17
Ceiling fan 2-2 3-2 4-3 5-4 7-5
6A sockets 2 3 4 5 7
16A sockets - 1 2 3 4
Call Bell - - 1 1 1
Description Socket Outlets
6A 16A
Bed rooms 2-3 1
Living rooms 2-3 2
Kitchen 1 2
Dining room 2 1
Garage 1 1
For Refrigerator - 1
For Air Conditioner - 1
Verandah 1 for every 10 sq m -
Bathrooms 1 1
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Min no. of socket outlets
Min no. of points to be provided on the basis of plinth area

23. Units of Electrical Energy Consumed
by common Domestic
Appliances/Equipment
ELECTRICAL APPLIANCES WATTAGE RATING
Incandescent Bulb 25W,60W,100W
Fluorescent Tube light (4feet) 40W
Fan 60W
Air Conditioner (1-1.5 ton) 1500-2500W
Refrigerator 100W
Mixer/Blender/Juicer 450W
Toaster 800W
Oven 450-700W
Electric kettle 1000/2000W
Iron 450/700W
Geyser(1.5-2 litre) 3000W
Vacuum Cleaner 700-750W
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24. ELECTRICAL APPLIANCES WATTAGE RATING
Washing Machine 325W
Television 60-120W
Computer 120-600W
Radio 15W
Stereo System 50W
CFL 15W
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25. Fifth floor
25

26. Electrical Notations
26

27. Calculation of Connected Load
(Fifth Floor)
Sl
No
Room Space FL
Tube
4 feet
(40W)
CFL
light
(15W)
6A
socket
(60W)
16A
socket
(500W
)
25A
Socket
(2500
W)
Exhaust
Fan
(60W)
Ceiling
Fan
(60W)
Chandelier
(200W)
Total
CL of
room
space
1 Living Room +
Balcony
2 4 1 2 2 1 1520
2 Dining Room
+Balcony
1 4 2 2 2 1340
3 a Bedroom 1 +
Balcony
1 4 3 2 1 1 3840
b Dressing Room 1 2 1 90
c Toilet 1 2 1 1 590
4a Bedroom 2 1 4 3 2 1 1 3840
b Toilet 2 2 1 1 590
5a Bedroom 3 1 3 3 2 1 1 3825
b Toilet 3 2 1 1 590
6a Kitchen+ Work
Area
1 3 2 3 1 1 1825
b Toilet 1 1 75
7 Foyer 2 30
TOTAL=18155W 27

28. Distribution Board
• Total No: of light points= 66
(No. of light points= light+fan+6A socket+exhaust
fan)
• No: of light circuits= 66/8 = 8.25 ~9
• Total No: of power points = 19
• No: of power circuits = 19/2 = 9.5~ 10
• Total No: of sub-circuits = 10+9 = 19
• Therefore we choose 8 way 3 phase DB which
has 24 (i.e. 3x8) sub-circuits.
28

29. Calculation of Connected Load
(Third Floor)
Sl
No
Room Space FL
Tube
4 feet
(40W)
CFL
light
(15W)
6A
socket
(60W)
16A
socket
(500W)
25A
Socket
(2500
W)
Exhaust
Fan
(60W)
Ceiling
Fan
(60W)
Chandelier
(200W)
Total
CL of
room
space
1 Living Room+ Balcony 1 10 3 1 1 2 1 3690
2 Toilet 4 3 1 168
3 Hall 1 4 6 1 1 2 1 3920
4 Family Living+Dining 1 7 3 1 1 2 3445
5 Foyer 4 60
6 Kitchen 2 2 5 3 1 1 1 4530
7 Work Area 1 2 2 1 1 750
8 Store 1 1 55
9 Serva t’s Roo 1 2 1 195
10 Serva t’s Toilet 1 1 75
11a Bedroom +Balcony 1 5 2 5 1 1 5295
b Dressing Room 1 1 75
c Toilet 2 1 1 1 650
TOTAL=22908W29

30. Calculation of Connected Load
(Fourth Floor)
Sl
N
o
Room Space FL
Tube
4 feet
(40W)
Bell
(60W)
CFL
light
(15W
)
6A
socket
(60W)
16A
socket
(500W
)
25A
Socket
(2500
W)
Exhaust
Fan
(60W)
Ceiling
Fan
(60W)
Chandelier
(200W)
Total
CL of
room
space
1 Family Living Room 3 1 9 1 6 1 2 1 6195
2a Bedroom1 +Balcony 1 5 1 6 1 2 5795
b Dressing Room 1 15
c Toilet 2 2 1 1090
3a Bedroom 2 1 1 6 1 2 5720
b Dressing Room 2 30
c Bathroom 2 2 1 1090
4a Bedroom 3 1 7 1 3 1 2 4325
b Dressing 3 45
c Toilet 3 2 1 1105
5a Bedroom 4 1 3 1 8 1 2 6765
b Dressing Room 2 30
c Toilet 2 2 1 1090
30

31. Sl
N
o
Room Space FL
Tube
4 feet
(40W)
Bell
(60W)
CFL
light
(15W)
6A
socket
(60W)
16A
socket
(500W)
25A
Socket
(2500
W)
Exhaust
Fan
(60W)
Ceiling
Fan
(60W)
Chandelier
(200W)
Total CL
of room
space
6 Yoga Room 2 4 2 2 1260
7 Internal stairs 1 15
8 Lift(10) 10000
TOTAL=34555W
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32. Calculation Of Common
Connected Load
Sl.no Room Space FL light 4 ft
(40W)
CFL light
(15W)
Total connected
load
1 Parking (Second floor) 55 825
2 Lobby 24(6 floors) 360
3 Stairway 12(7 floors) 480
4 Terrace floor 12 180
5 Mezzanine 6 90
6 Machine room 4 60
7 Lift(10) 10000
8 Stretcher lift(18) 15000
8 External lights 20 300
9 Water lifting pump 5000
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33. Current Status
• Connected Load of all floors (except commercial) has been calculated.
• Distribution Board of one apartment has been decided.
• Supplementary drawings were completed.
Work to be Completed
DB of commercial floors and Common CL, Cabling, Metering Panel
Design, Transformer Design, Emergency Power Supply, Earthing and
extensive electrical drawings have to be completed.
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34. References
• Electrical Systems Design by M.K. Giridharan
• Electrical design estimating and costing by K.B
Raina and S.K Bhattacharya
• National Electric Code, Bureau of Indian
Standards publications, 1986.
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