DESIGN OF THE ELECTRICAL SERVICES
OF A MULTISTOREY BUILDING
by
PAPAZACHARIOU ELISAVET
Project Report
Submitted to
the Department of Electrical Engineering
of the Higher Technical Institute
Nicosia Cyprus
in partial fulfillment of the requirements
for the diploma of
TECHNICIAN ENGINEER
in
ELECTRICAL ENGINEERING
Mo.}
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1990 .
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SUMMARY
DESIGN OF THE ELECTRICAL SERVICES
OF A MULTISToREY BUILDING
by
PAPAZACHARIoU ELISAVET
The main objectives are:
1)
To design the electrical installation of a multistorey
building pertaining to a block of flats.
2)
To design the telephone installation.
3)
To
study
the
illumination
engineering
work
involved
and costing, including labour.
Terms and Conditions
1)
Voltage supply 415/240 V, 50HZ
2)
The
work
must
be
carried
out
wi th
reference
to
the
plans provided.
3)
Supply for lift room and machinery.
4)
Three suitable water pumps should be considered.
5)
lEE and EAC regulations must be complied with.
6)
In
designing
the
lighting
load
the
CIBS code must
considered.
7)
CYTA requirements to be taken into account.
be
CONTENTS
PAGE
ACKNOWLEDGEMENTS
SUMMARY
INTRODUCTION
CHAPTER ONE:
1 .1.
1. 2 •
1 .3 .
1 .4 .
1 .5 .
INTRODUCTION
USEFUL TERMS USED
CALCULATION PROCEDURE
ACTUAL DESIGNS
ILLUMINATION ANALYSIS RESULTS FOR EACH FLAT
CHAPTER TWO:
GENERAL
SECTION A
2.A.1.
2.A.2.
2.A.3.
2.A.4.
2.A.5.
2.A.6.
2.A.7.
2.A.8.
2.A.9.
ILLUMINATION
3.2.
3.3.
3.4.
3.5.
3.6.
5
6
9
POWER AND LIGHTING SYSTEMS
11
EQUIPMENT DESCRIPTION
ELECTRICAL SUPPLY
DISTRIBUTION BOARDS
PROTECTION DEVICES
CABLING
CONDUITS
CONDUIT SIZING
SOCKET OUTLETS
WATER HEATER
SWITCHES
CHAPTER THREE:
3•1.
i
3
3
12
12
12
12
13
14
15
15
15
DIVERSITY AND MAIN SUPPLY
GENERAL
TOTAL CURRENT DEMAND
SUPPLY CABLE
ANALYSIS RESULTS
FAULT LEVEL CALCULATIONS
FAULT LEVEL CALCULATIONS RESULTS
47
49
49
50
51
53
PAGE
SECTION 8
2.8.1.
2.8.2.
2.8.3.
2.8.4.
2.8.5.
GENERAL
OVERLO AD CONSIDERATIONS
ELECTRIC SHOCK CONSIDERATIONS
THERMAL CONSTRAINTS CONSIDERATIONS
SHORT CIRCUIT CONSIDERATIONS
SECTION C
2.C.1.
2.C.2.
17
18
20
21
INSTALLATION OF SOCKET OUTLETS
22
a.
Fo r ring circuits
22
b.
For radial circuits
26
ACTUAL DESIGN
22
29
INSTALLATION OF FIXED APPLIANCES
GENERAL
DESIGN PROCEDURE
COOKER
WATER HEATER
WASHING MACHINE
SECTION E
2.E.1.
2.E . 2 .
2.E.3.
2.E.4.
17
GENERAL
DESIGN PROCEDURE
SECTION D
2.D.1 .
2.D.2 .
2.D.3 .
2.D.4.
2.D.5.
PROTECTION FOR SAFETY
32
32
33
36
39
INSTALLATION OF LIGHTING POINTS
GENERAL
DESIGN PROCEDURE
ACTUAL DESIGN
LIGHTING LOAD ANALYSIS RESULTS (FOR THE "FLATS)
41
41
42
45
SECTION F
GENERAL LOAD ANALYSIS RESULTS
(FOR ALL CIRCUITS IN EACH FLAT)
46
PAGE
CHAPTER FOUR : COMMON USE AREAS INSTALLATION
SECTION A
GENERAL
DIRECT ON LINE STARTER
ISOLATORS
M.C.B'.s RATING
DESIGN PROCEDURE
4.A.1.
4.A.2.
4.A.3.
4.A.4.
4.A.5.
~
SECTION B
4.B.3.
4.B.4.
4. B. 5.
SECTION C
4.C.3.
4.C.4.
54
55
55
55
56
SUPPLY TO THE LIFT ROOM
MOTOR IN THE LIFT ROOM
SOCKET OUTLET AND LIGHTING POINT
IN THE LIFT ROOM
TYPICAL CALCULATIONS OF THE MCB
POSITIONED IN THE E.A.C. METERS PLACE
ON THE GROUND FLOOR
ISOLATOR USED
CHECKING FOR OIL AND SIC PROTECTION
FOR THE LIFT
4.B.1.
4.B.2.
4.C.1.
4.C.2.
INSTALLATION OF ELECTRIC MOTORS
60
62
63
64
64
SUPPLY TO WATER PUMPS
MOTOR USED TO SUPPLY A TYPICAL WATER PUMP
STARTER USED TO START THE MOTOR OF THE
WATER PUMP
CHECKING FOR OIL & SIC PROTECTION FOR
EACH WATER PUMP
RADIAL CIRCUITS ACTUAL DESIGN
67
69
70
71
SECTION D STAIRCASE LIGHTING
73
SECTION E
74
ANALYSIS RESULTS
SECTION F
4.F.1.
4.F.2.
OVERALL LOAD DISTRIBUTION
GENERAL
SUPPLY CABLE
CHAPTER FIVE·
5.2.
5.3.
5 .4.
5.5.
5.6.
76
77
STORAGE HEATERS POWER RATING
BALANCING OF CIRCUITS
TYPICAL DESIGN
ANALYSIS RESULTS
MAIN FUSE AND CABLE
FAULT LEVEL CALCULATIONS
CHAPTER SIX:
SECTION B
EQUIPMENT AND ACCESSORIES WHICH ARE
USED IN THE ANTENNA SYSTEM
AERIAL
AMPLIFIER
TAP-OFF UNITS
SOCKET-OUTLETS
CABLE FEEDERS
SECTION C
78
78
79
80
81
81
CENTRAL ANTENNA SYSTEM
SECTION A GENERAL
6.B.1.
6.B.2.
6.B.3.
6.B.4.
6.B.5.
75
STORAGE HEATERS INSTALLATION
GENERAL
5. 1 .
75
INSTALLATION INSTRUCTIONS
83
86
86
86
87
87
87
88
SECTION D DESIGN PROCEDURE
89
SECTION E
90
ACTUAL DESIGN
90
6.E.1.
6.E.2.
6.E.3.
6.E.4.
GENERAL
SELECTION OF AMPLIFIER UNIT
CALCULATION OF THE ATTENUAToR
DESIGN OF ATTENUAToRS
93
6.E.5.
USE OF TT ATTENUAToR
93
92
9Z
SECTION F
4.F.1.
4.F.2.
OVERALL LOAD DISTRIBUTION
GENERAL
SUPPLY CABLE
CHAPTER FIVE:
5.2.
5 .3.
5.4.
5.5.
5.6.
75
76
STORAGE HEATERS INSTALLATION
GENERAL
5. 1 .
75
77
STORAGE HEATERS POWER RATING
BALANCING OF CIRCUITS
TYPICAL DESIGN
ANALYSIS RESULTS
MAIN FUSE AND CABLE
FAULT LEVEL CALCULATIONS
CHAPTER SIX:
78
78
79
80
81
81
CENTRAL ANTENNA SYSTEM
SECTION A
GENERAL
83
SECTION B
EQUIPMENT AND ACCESSORIES WHICH ARE
USED IN THE ANTENNA SYSTEM
86
6.B.1.
6.B.2.
6.B.3.
6.B.4.
6.B.5.
AERIAL
AMPLIFIER
TAP-OFF UNITS
SOCKET-OUTLETS
CABLE FEEDERS
SECTION C
INSTALLATION INSTRUCTIONS
86
86
87
87
87
88
SECTION D DESIGN PROCEDURE
89
SECTION E
90
ACTUAL DESIGN
6.E.1.
6.E.2.
6.E.3.
6.E.4.
GENERAL
SELECTION OF AMPLIFIER UNIT
CALCULATION OF THE ATTENUAToR
DESIGN OF ATTENUAToRS
90
6.E.5.
USE OF TT ATTENUAToR
93
92
92
93
6.E.6.
6.E.7.
6.E.8.
6.E.9.
CALCULATIONS
CALCULATION OF SIGNALS REGUIRED TO BE
FED TO THE AMPLIFIER BY THE ANTENNA
SELECTION OF ANTENNAS
CALCULATION OF THE GAIN OF EACH ANTENNA
CHEC~ING
CHAPTER SEVEN:
7. 1 .
7 •2•
8. 1 .
8.2.
8.3.
8.4.
9•1.
9.2.
9 .3.
9.4.
9.5.
9.6.
9.7.
10. 1 .
10.2.
10.3.
10.4.
10.5.
96
97
98
98
100
100
102
102
EARTHING
INTRODUCTION
WHAT IS EARTHING
EARTHING SYSTEMS
METHOD OF EARTHING
TT SYSTEM OF SUPPLY
EARTH FAULT LOOP IMPEDANCE ( E . F . L • I . )
EARTH ELECTRODE
CHAPTER TEN:
95
LIGHTNING PROTECTION SYSTEM
GENERAL
NEED OF LIGHTNING PROTECTION
LIGHTNING PROTECTION METHODS
MAIN COMPONETS
CHAPTER NINE:
95
DOOR ENTRY TELEPHONE SYSTEM
GENERAL
OPERATION
CHAPTER EIGHT:
9
104
104
105
105
106
107
107
TELEPHONE INSTALLATION
GENERAL
MAIN DISTRIBUTION CASE
CONDUIT FRAME WOR~
WIRING
ACTUAL DESIGN
109
109
110
110
110
CHAPTER ELEVEN ·· INSPECTION AND TESTING
11.1.
11.2.
11 .3.
11.4.
INTRODUCTION
VISUAL INSPECTION
TESTING SEQUENCE
TESTING
CHAPTER TWELVE ··
12. 1 .
12.2.
12.3.
12.4.
112
112
113
113
SCHEDULE OF MATERIALS AND COSTING
INTRODUCTION
MATERIALS AND LABOUR COST
GENERAL COSTS
TOTAL COST
COMMENTS - CONCLUSIONS
REFERENCES
APPENDICES
SYMBOLS
DRAWINGS
SINGLE LINE DIAGRAMS
TELEPHONE CONDUIT & WIRING DIAGRAM
116
119
130
131
132
134
135