Final Report EEE460 f100

Chittagong University of Engineering and Technology
Department of Electrical and Electronic Engineering

Electrical Services Design
Course Code: EEE 460
Submitted By
Yeasin Arafat Sabbir Ahmed
ID No.:1802009 ID No.:1802108
Submitted to-
Dr. Muhammad Ahsan Ullah Dr. Tofael Ahmed
Professor Professor
Department of EEE, CUET Department of EEE, CUET
Remarks
0
The requirements of this Project:
✓ Project Title
✓ Project Type (public/Privet)
✓ Project profile
✓ Detail Plan drawing
✓ Drawing with fittings and fixers
✓ Conduit drawing
✓ Cabling drawing
✓ One line diagram drawing with cable size and length
✓ Installation schedule
✓ Load study analysis
✓ Bill of quantity
✓ Estimation
✓ Grounding Technique and corresponding circuit diagram
✓ Concluding remarks.
✓ Lighting system
✓ Fire and emergency safety.
1
Contents
1. Project Title: Electrical Service Design of 21’x30’ Single Stored Residential Building. ................... 3
2. Project Type: Private. .......................................................................................................................... 3
3. Project Profile: .................................................................................................................................... 3
Designer: ...................................................................................................................................................... 3
4. Detail Plan drawing ............................................................................................................................ 4
5. Lighting System: ................................................................................................................................. 5
6. Drawing With Fittings and Fixers:.................................................................................................. 11
7. Conduit Drawing: ............................................................................................................................. 13
8. Cabling Drawing: .............................................................................................................................. 15
9. Single Line Diagram Drawing with Cable Length: ....................................................................... 16
10. Installation schedule: .................................................................................................................... 17
11. Load Study Analysis: .................................................................................................................... 19
12. Estimation and Bill of Quantity (BOQ): ..................................................................................... 23
13. Grounding Technique and corresponding Circuit Diagram..................................................... 27
14. Lightning Protection:.................................................................................................................... 30
15. Fire and Emergency Response: ................................................................................................... 31
16. Concluding Remarks: ................................................................................................................... 31
List of Figures:
Figure 1 Architectural details plan of single stored Building ....................................................................... 4
Figure 2 Use as wall mounted light for using normal & mirror.................................................................... 6
Figure 3 Symbol of Fittings and Fixers ...................................................................................................... 11
Figure 4 Drawing of fittings and fixers ....................................................................................................... 12
Figure 5 Legend of Conduit & Electrical Wire........................................................................................... 13
Figure 6 Conduit Drawing .......................................................................................................................... 14
Figure 7 Cabling Drawing .......................................................................................................................... 15
Figure 8 Single Line Diagram with Cable Length ..................................................................................... 16
Figure 9 Symbol of Grounding ................................................................................................................... 28
Figure 10 Connection Diagram of Grounding Technique .......................................................................... 29
Figure 11 Reference (BNBC Code) of Lightning Protection...................................................................... 30
2
1. Project Title:
Electrical Service Design of Single Stored Residential Building.
2. Project Type: Private.

3. Project Profile:
Designer:
Yeasin Arafat Sabbir Ahmed
ID: 1802009 ID: 1802108
Client Name: Md Abdus Satter

Location:
Noapara, Raozan, Chittagong.
Latitude: 22°45'0" N
Longitude: 89°39'0" E;
3
4. Detail Plan drawing
Scaling factor = 10:1
Figure 1 Architectural details plan of single stored Building
4
5. Lighting System:
There are two essential methods for determine the type of luminaires to be use. The two key
methods are called the point by point method and the lumen method.
The Point by Point method, also known as the inverse square law, is less commonly used in
lighting design due to its complexity and limitations. It is primarily applied when determining
illumination levels for specific areas, such as flood lighting or recess lighting, where the
intricacies of light distribution need careful consideration. In contrast, the Lumen method is a
more widely adopted approach for lighting design, particularly when overhead luminaires are
installed in a conventional pattern, offering a practical and commonly accepted method for
calculating the required lighting points in each room based on total lumens.
𝐿𝑢𝑚𝑖𝑛𝑎𝑛𝑐𝑒 𝑋 𝐴𝑟𝑒𝑎 𝑜𝑓 𝑊𝑜𝑟𝑘𝑖𝑛𝑔 𝑃𝑙𝑎𝑐𝑒
Total Lumen =
𝑀𝑎𝑖𝑛𝑡𝑎𝑖𝑛𝑎𝑛𝑐𝑒 𝑓𝑎𝑐𝑡𝑜𝑟 𝑋 𝑈𝑡𝑖𝑙𝑖𝑧𝑎𝑡𝑖𝑜𝑛 𝑓𝑎𝑐𝑡𝑜𝑟
𝐴×𝐸
𝑛=
𝑢𝑓 ×𝑚𝑓 ×𝜑𝑛
Where, n = the number of lamps required.

E = the illuminance level required (lux)
A = area of the working plane height (m2 )
∅ = the average luminous flux from each lamp (lm)

MF= maintenance factor, an allowance for reduced light output due to deterioration and dirt.
UF= utilization factor, an allowance for the light distribution of the luminaire and the room surfaces.
5
Light & Lighting Design:
Lighting Design Calculation:
Bedroom (All):
Recommended values of Illumination according to BNBC gadget 2015 &

Table 8.1.5
Bed head, Dressing table (E)= 250 lux
Luminous flux of each 20W LED Bulb, ∅𝑛 = 1900 lm
Figure 2 Use as wall mounted light for using normal & mirror
Assuming utilization factor, 𝑈𝑓 = 0.6 & maintenance factor, 𝑀𝑓 = 0.85
Area: Scaling Factor = 10:1
Dimension of Bed room 300 x 270 mm

So Area, 𝐴 = 𝐿𝑒𝑛𝑔𝑡ℎ × 𝑊𝑖𝑑𝑡ℎ
𝐴 = (3000× 2700) mm.2
𝐴 = 8.1 𝑚2
Number of fittings:
𝐴×𝐸
𝑛=
= 2.08 𝑢𝑠𝑒 2 𝑓𝑖𝑡𝑡𝑖𝑛𝑔
6
Bathroom (Ground Floor):
Recommended values of Illumination according to BNBC gadget 2015 & Table 8.1.5
General:
General(E)= 100 lux
Luminous flux of each 20W LED Bulb, ∅𝑛 = 1900 lm
Area:
𝐴 = 𝐿 × 𝑊 = (2.7 × 1.3) 𝑚2 = 3.51 𝑚2
Number of fittings:
𝐴×𝐸
𝑛=
𝑛=0.33
𝑢𝑠𝑒 1 𝑓𝑖𝑡𝑡𝑖𝑛𝑔
Shaving, Make-up:
Luminous flux of each 10 W wall mounted (Just above the mirror)

LED Bulb, ∅𝑛= 900 lm
Shaving, Make-up(E)= 300 lux
Number of fittings:
𝐴×𝐸
𝑛=
𝑛=1.38 𝑢𝑠𝑒 1 𝑓𝑖𝑡𝑡𝑖𝑛𝑔
7
Dining Hall (Ground Floor):
Dining (E)= 150 lux

Luminous flux of each 20W ceiling mounted LED Bulb, ∅𝑛 = 1900 lm
Area:
𝐴=𝐿×𝑊
𝐴 = (2.7 × 2.6) 𝑚2
𝐴 = 7.02 𝑚2
Number of fittings:
𝐴×𝐸
𝑛=
= 1.38, 𝑢𝑠𝑒 2 𝑓𝑖𝑡𝑡𝑖𝑛𝑔𝑠
Kitchen Room (Ground Floor):

Dining (E)= 200 lux

Length of room, L =3 m
Width of room, W = 3 m
Area:
𝐴=𝐿×𝑊
𝐴 = (3 × 3) 𝑚2
𝐴 = 9 𝑚2
Number of fittings:
𝐴×𝐸
𝑛=
𝑛 = 1.85, 𝑢𝑠𝑒 2 𝑓𝑖𝑡𝑡𝑖𝑛𝑔𝑠
8
Rest Space:
Dining (E)= 150 lux (Considering same for dining room)

Length of room, L = 1.8 m
Width of room, W = 1 m
Area: 𝐴 = 𝐿 × 𝑊 = (1.8× 1) 𝑚2
𝐴 = 1.8 𝑚2
Number of fittings:
𝐴×𝐸
𝑛=
𝑛 = 0.27 𝑢𝑠𝑒 1 𝑓𝑖𝑡𝑡𝑖𝑛𝑔𝑠
Stair Room:
Stair house (E)= 100 lux

Length of room, L = 1.2 m
Width of room, W = 0.9 m
Area: 𝐴 = 𝐿 × 𝑊 = (1.2 × 0.9)𝑚2
𝐴 = 1.08 𝑚2
Number of fittings:
𝐴×𝐸
𝑛=
𝑛 = 0.14, 𝑢𝑠𝑒 1 𝑓𝑖𝑡𝑡𝑖𝑛𝑔𝑠
9
SIT OUT:
Porch (E)= 100 lux (Considering same for porch)

Length of room, L = 3 m
Width of room, W = 1.2 m
Area: 𝐴 = 𝐿 × 𝑊= (3 × 1.2) 𝑚2
𝐴 = 3.6 𝑚2
𝐴×𝐸
Number of fittings: 𝑛=
𝑛 = 0.48, 𝑢𝑠𝑒 1 fitting
Summary of Light Fittings:
Recommended Area of Luminous

Number
Location Illumination Location Light Types Flux of Each
(lux) of Fittings
(m2) (lm)
Bedroom
250 8.1 LED (20W) 1900 2.08= 2
(All)
Bathroom (Ground Normal- 100 LED (20W) 1900 0.38=1
Floor) Mirror- 300 3.51 LED (10W) 900 1.3=1
Dining Hall (Ground

150 7.02 LED (20W) 1900 1.38=2
Floor)
Kitchen Room
200 9 LED (20W) 1900 1.85=2
(Ground Floor)
Rest Space 150 1.8 LED (20W) 1900 0.27=1
Stair Room 100 1.08 LED (20W) 1900 0.14=1
SIT OUT 0.48=1
100 3.6 LED (20W) 1900
(Entrance)
10
Fan:
According to BNBC recommended fan sizes (Table 8.1.20)
1. Ceiling Fan
Area of Fan Sweep Coverage Number of Fan Required
Location Location (m2) (m) (m2)
Bedroom
8.1 1.42 12 8.1/12 = 0.68 = 1
(All)
Dining Room 7.02/12=0.59= 1
(Ground Floor) 7.02 1.42 12
2. Exhaust Fan
Location Number of Fan Required
Kitchen 1
Bathroom 1
6. Drawing With Fittings and Fixers:

In the context of electrical installations, fittings and fixtures encompass components such as
conduits, wiring, switches, outlets, light fixtures, distribution boards, circuit protection
devices, and safety equipment. Proper selection and installation of these elements are crucial
for ensuring a safe and efficient electrical system.
Figure 3 Symbol of Fittings and Fixers
11
Figure 4 Drawing of fittings and fixers
12
7. Conduit Drawing:
A conduit drawing is a technical diagram illustrating the layout and specifications of conduits in
an electrical system. It provides details on conduit sizes, routing, connections, and entry/exit
points, aiding in the accurate installation of conduits for the safe and efficient distribution of
electrical wiring.
Figure 5 Legend of Conduit & Electrical Wire
13
Figure 6 Conduit Drawing
14
8. Cabling Drawing:
A cabling drawing in electrical service design typically includes detailed information about the
layout, routing, and specifications of various cables used in the electrical infrastructure. This
drawing provides a visual representation of the placement and connections of power cables,
control cables, communication cables, and any other relevant wiring.
Figure 7 Cabling Drawing
15
9. Single Line Diagram Drawing with Cable Length:
A One-Line Diagram with cable size and length is a comprehensive schematic representation
of an electrical system that includes key information about cable specifications and lengths. In
such a drawing, the electrical components and their interconnections are simplified and
represented by symbols, while cable details are annotated for clarity.
One-Line Diagrams with cable size and length annotations are valuable tools for engineers,
electricians, and other professionals involved in the design, analysis, and maintenance of
electrical systems. They provide a quick and effective means of conveying essential
information about the system's architecture and the characteristics of the electrical conductors
employed.
Figure 8 Single Line Diagram with Cable Length
16
10. Installation schedule:
Preparation Phase:
Week 1-2
• Site survey and investigation
• Obtain necessary permits and approvals
• Moving equipment and materials to the site
Rough-In Phase:
Week 3-6
• Install conduit and wiring for power distribution
• Rough-in wiring for lighting and outlets
• Coordinate with other trades for concurrent work
Panel Installation:
Week 7-8
• Install main electrical panels
• Connect panels to power source
• Label and document panel connections
• Detail Plan Drawing
Device Installation:
Week 9-12
• Install switches, outlets, and lighting fixtures
• Connect devices to wiring system
• Conduct preliminary testing of installed devices
Final Connections:
Week 13-14
• Make final connections in electrical panels
• Complete wiring terminations
• Verify circuit integrity and proper grounding
17
Inspections:
Week 15
• Schedule and undergo inspections as required by local authorities
Address any issues or deficiencies identified during inspections
Testing and Commissioning:

Week 16-17
• Conduct system testing to ensure proper functionality
• Perform load testing on circuits
• Verify proper operation of safety devices
Documentation and As-Builts:
Week 18
• Create as-built drawings reflecting any changes made during installation
• Compile operation and maintenance manuals
• Document final equipment specifications
Client Training:
Week 19
• Provide training to the client's staff on the operation and maintenance of the electrical
systems
• Address any client concerns or questions
Project Closeout:
Week 20
• Complete any outstanding punch list items
• Obtain final approvals and sign-offs
• Submit required documentation to relevant authorities
18
Installation Schedule
Week Progress
Week 1-2 Preparation Phase
Week 3-6 Roughing Phase
Week 7-8 Panel Installation
Week 9-12 Device Installation
Week 13-14 Final connection
Week 15 Inspection
Week 16-17 Testing and commissioning
Week 18 Document and As-built
Week 19 Client Training
Week-20 Project Closeout
11. Load Study Analysis:

Load Calculation:
Dining Room and Rest space Load calculation at switchboard1 (SB1, Load1):
Ceiling fan (80 x 1) = 80 watt
Wall Bracket Light (3 x 20) = 60 watt
Concealed spot Lights (1 x 10) = 10 watt
2-Pin 5A Socket (1 x300) =300 watt
3-Pin 15A Socket (1 x1500) =1500watt
Total Loads = 80+60+10+300+1500 = 1950 watts
Include 20 % additional load = 1950 x (20/100) = 390 watt
The complete load is 1950 + 390 = 2340 watt
The incoming supply is 220 volts

𝑃 2340
So the complete load 1 appliances is I = 𝑣 cos 𝜃 = 220∗0.9 = 11.82 amps
19
Bed Room Load Calculation (2 Bed room has same load, SB2 & SB5):
Load2 and Load5:
Ceiling fan (80 x 1) = 80 watt
2-Pin 5A Socket (1 x300)=300 watt
3-Pin 15A Socket (1 x1500)=1500watt
Include 20 % additional load = 1930 x(20/100) = 386 watt
The complete load is 1930 + 386 = 2316 watt

𝑃 2316
So the complete load2 and Load5 appliances is I = 𝑣 cos 𝜃 = 220∗0.9 = 11.7 amps
SIT OUT Load Calculation (SB3, Load3):
Total Loads = 20+10+300+1500 = 1830 watts
The complete load3 is 1830+366 = 2196 watt

𝑃 2196
So, the complete load 3 appliances is I = 𝑣 cos 𝜃 = 220∗0.9 = 11.09 amps
Bathroom Load Calculation (SB4, Load4):
Exhaust Fan (1 x45) =45 watt
20
Total Loads = 40+10+45 = 95 watts

𝑃 114
Kitchen Room Load Calculation (Load6, SB6):
Exhaust Fan (1 x45) =45 watt

𝑃 2274
Total Load in Watt = 1950+(1930 x 2) +1895+95+1830=9630
The Complete Load = 9630+1626=11556 watt

𝑃 11556
So, the complete load appliances is I = 𝑣 cos 𝜃 = 220∗0.9 = 58.36 amp
If Demand Factor 70%. Then Total Load Current = 58.36*70% = 40 amp
21
Load Calculation (Tabular form):
Ground Floor
Unit Power of Total
Serial No. Eqiupment Quantity Power(W) equipment(W) power(W)
1 FAN 3 80 240
2 EXHAUST FAN 2 45 90
3 CONCEALED SPOT LIGHT 6 10 60
9630
4 WALL BRACKET LIGHT 11 20 220
6 2-Pin Socket (5A) 5 300 1500
7 3-Pin Socket (15A) 5 1500 7500
Circuit Breaker & Cable Selection:

Considering-
Line Voltage, V= 220 V; Power Factor, pf = 0.9.

𝑃𝑜𝑤𝑒𝑟
Current, 𝐼 =
𝑉𝑜𝑙𝑡𝑎𝑔𝑒×𝑃𝑜𝑤𝑒𝑟 𝐹𝑎𝑐𝑡𝑜𝑟
Circuit Location/ Power Current Cable Size Breaker Breaker

Breaker Information (Watt) (A) (mm^2) Size Type
CB-1 Main Supply 11556 58.4 25 40 MCB

Dining Room
CB-2 and Rest 2340 11.82 4 16 MCB
space
CB-3 Bedroom 2316 11.7 4 16 MCB
CB-4 SIT OUT 2196 11.09 4 16 MCB
CB-5 Bathroom 114 0.57 1.5 2 MCB
CB-6 Bedroom 2316 11.7 4 16 MCB
CB-7 Kitchen 2274 11.48 4 16 MCB
Considering, Load factor is 70%. So, Maximum demand = 11556 × 0.7 𝑤𝑎𝑡𝑡 = 8090 𝑤𝑎𝑡t
Taken as the terminal voltage, E =220 V. Power factor is the, pf =0.9 (lagging)
8090𝑤𝑎𝑡𝑡
Now total current for the First Floor, 𝐼1 = 220𝑉∗0.9
≅ 40𝐴
22
So required circuit breaker rating,
Ambient temperature =25𝑜 𝐶
Operating frequency =50𝐻𝑍
Terminal voltage =220V
Rated current =40A
Calculation for generator and transformer:

Total load [with demand factor70%] = 8090 KW
8.306
As the total system is 0.9 lagging, so the KVA rating = KVA =8988 KVA.
0.9
As we see here, the total load of this single storied building is not very large (hasn’t exceeded 50 KW).
So, there is no need of using generator for additional power.
Moreover, the total KVA rating of the building is also moderate. That’s why, the distribution transformer
will be enough for transmitting the required power. There is no need for additional transformer.
12. Estimation and Bill of Quantity (BOQ):
Bill of Quantity (BOQ)
Rate Amount
Sl. Group of
Description of the Item Quantity Unit In Taka
No Work In Taka
3/4'ø PVC PIPE Concealed in Celling & Wall For Electrical Cable.
1 PVC Pipe 45.00 m 22.87 1029.15
Conduit diameter 19mm.
1'ø PVC PIPE Concealed in Celling & Wall For Electrical Cable 15
2 PVC Pipe m 40.26 603.9
4 x 25.0 sq mm NYY Cable with 6.0 sq mm (BYM) ECC wire

through pvc pipe of minimum inner dia 50 mm having wall thickness
3 Cable 1 m 1870.55 1871
of 2.5 mm.
2 x 1.5 sq mm BYA rm Cable through pvc pipe of minimum inner

4 Cable dia 20 mm having wall thickness of 1.5mm. 200 m 49.51 9902
23
2 x 4.0 sq mm BYA rm Cable with 2.5 sq mm (BYA) ECC wire
5 Cable through pvc pipe of minimum inner dia 20 mm having wall thickness 36 m 172.54 6211
of 1.5mm.
Switch Three Gang one way Switch

6 1 Each 240 240
Board
Switch Four Gang one way Switch
7 1 Each 260 260
Board
Four Gang one way Switch + 2 pin Socket combined
Switch
8 4 Each 250 1000
Board
Providing & fixing on a prepared board 250 Volt grade Following

Single-pole miniature Circuit Breaker (SPMCBs) having minimum
SP 2 A breaking capacity 6-KA with thermal over current and
9 MCB instantaneous electromagnetic short circuit release provision. Brad 1 Nos 600 600
and Country of origin of SPMCCB are Fuji (Japan). or equivalent
approved by the Engineering-in-charge.

breaking capacity 6-KA with thermal over current and
instantaneous electromagnetic short circuit release provision. Brad
DP 40 A
10 and Country of origin of SPMCCB are Fuji (Japan). or equivalent 1 Nos 600 600
MCB
approved by the Engineering-in-charge

breaking capacity 6-KA with thermal over current and
SP 16 A instantaneous electromagnetic short circuit release provision. Brad
11 5 Nos 600 600
MCB and Country of origin of SPMCCB are Fuji (Japan). or equivalent
approved by the Engineering-in-charge.
Concealed conduit wiring for following point looping at the

switch board with earth terminal including circuit wiring with IC-
12 2x1.5 sq. mm PVC insulated stranded cable (BYM) , PVC
insulated & sheathed twisted 2 pair telecommunication
cable,UTP-CAT-6 Network cable, Dish cable & 1.5 sq. mm PVC
insulated green / white colored ECC wire (BYA) through PVC
conduit (Lira Brand or equivalent product of other reputed
2 pin 5 amps manufacturer) of minimum 25 mm dia & 1.5 mm wall thickness
Socket point complete with 18 SWG GP sheet, switch board and pull box with
(outlet) with 3 mm thick ebonite sheet cover,15A MK Combined Power 420 2100
5 Nos
control switch on Socket, 5 amps Gang type switch& Socket, Double jack Type
switch board. telephone socket, MKtype dish Antenna & Internet socket ,ceiling
rose, fixing materials etc. as required including mending the
damages good . All electrical contacts shall be of brass/copper
connected through connector or soldering (no twisting shall be
allowed) and cables shall be manufactured and tested according
to relevant IEC/BDS/BS/VDE standards. The work shall be
carried out as per direction of the engineer. Cables manufactured
by Govt. of Bangladesh owned / shared company Ltd (Eastern
cable).
24
2x1.5 sq. mm PVC insulated stranded cable (BYM) , PVC
cable,UTP-CAT-6 Network cable, Dish cable & 1.5 sq. mm PVC
insulated green / white colored ECC wire (BYA) through PVC
manufacturer) of minimum 25 mm dia & 1.5 mm wall thickness
15 amps complete with 18 SWG GP sheet, switch board and pull box with
Combined 3 mm thick ebonite sheet cover,15A MK Combined Power
13 5 Nos 340 1700
3 pin Power Socket, 5 amps Gang type switch& Socket, Double jack MKtype
Socket point. telephone socket, MKtype dish Antenna & Internet socket ,ceiling
to relevant IEC/BDS/BS/VDE standards. The work shall be
cable).
Supplying & fixing AC capacitor type ceiling fan (without
regulator) of following specifications and sizes complete with
minimum 305 mm (1 ft.) long and 0.75 -1.0" dia, 2.3 mm
thickness MS pipe down rod, tempered cast aluminum blades, 2.5
µf 400V AC
capacitor, canopy, double Z ball bearing, best quality silicon
sheet core, best quality copper made super enamel wire,
14 Ceiling Fan aluminum alloyed casting body having safety pin with powder 3 Nos 3000 9000
coated heat / docu paint as required etc. connecting PVC wire
complete as required.
Rated voltage : 220 volts, Rated frequency : 50 Hz, Rated speed :
300 rpm ± 5 %, Service value : Minimum 3.5 m3 / min / watt,
Temperature rise : Maximum 55ºC, Class of insulation : Class-E,
Noise level: 60 db at a distance 1 meter.
Input power: Maximum 65 watt.
Gang type fan regulator
15 Regulator Assembled made in Bangladesh/China 3 each 680 2040
Providing and fixing of following axial flow A.C capacitor type

wall mounted exhaust fan complete with blade, steel frame
standard wall louver shutter, PVC insulated connecting wire etc
16 Exhaust Fan complete as required including cutting wall and mending good the 2 Nos 1090 2180
damages as per direction of the Engineer. 10"/16" Exhaust fan
plastic/metal body (Foreign made accepted/approved by the
Engineer.)
10 W Ceiling Supply & fixing of 10 watt LED light fitting with driver , chips
LED etc. complete as required. All materials will be supplied & taken
17 5 each 520 2600
light/recessed back by the contractor by dismantling the same after completion
light of the contract period.

Fan Point with cable,UTP-CAT-6 Network cable, Dish cable & 1.5 sq. mm PVC
18 control switch on insulated green / white coloured ECC wire (BYA) through PVC 12.00 Nos 180 2160
switch board. conduit (Lira Brand or equivalent product of other reputed
complete with 18 SWG GP sheet, switch board and pull box with
3 mm thick ebonite sheet cover,15A MK Combined Power
Socket, 5 amps Gang type switch& Socket, Double jeck MKtype
25
telephone socket,MKtype dish Entana & Internet socket ,ceiling
to relavent IEC/BDS/BS/VDE standards. The work shall be
cable).
insulated & sheathed twisted 2 pair telecommunication cable,
UTP-CAT-6 Network cable, Dish cable & 1.5 sq. mm PVC
insulated green / white coloured ECC wire (BYA) through PVC
complete with 18 SWG GP sheet, switch board and pull box with
Internet Point 3 mm thick ebonite sheet cover,15A MK Combined Power
19 4.00 Nos 550 2200
Outlet Socket, 5 amps Gang type switch& Socket,Double jeck MKtype
telephone socket,MKtype dish Entana & Internet socket ,ceiling
to relavent IEC/BDS/BS/VDE standards. The work shall be
cable).
Wall mounted Bracket light fitting Model similar to Gloria model
GWB-82.00 Each 1,050.00 86,100.00 1201-1821-BR x 1, 20 W
CFL or equivalent model of Crescent or Shwash Model including
20 Light Fittings 11.00 each 250 2750
holders and all other necessary accessories complete. (without
lamp)
Concealed Spot 10watt Light

21 Lamp 5.00 each 180 900
22 SDB
SDB : Box size : 20"x 15" x 4"
25 Amps.rating 8 Nos. of bar each of minimum length 16" and
cross section 25 sq.mm assembled in 20"x 15" x 4" size 1.00 Nos 11250 11250
enclosure complete with porcelain insulators.
8 way SDB.
23 Earthing Earthing Lead: Supply and installation of solid drawn copper

wire through G.I. pipe of the following sizes, laid underground
from building DB to earthing inspection pit and connection to
earthing device by copper clamp with nuts and bolts every-
thing complete including necessary termination, earth work 1 Nos 6000 6000
back filling and compaction upto required level, the rate is
inclusive of G.I. pipe in wall ,86 Column and all complete as
per instruction of the Engineer-in-Charge.
No.-2 SWG HDBC through 1/2" dia G.I. Pipe
Total Bill of Quantity (BOQ) Equipment 67788

TK only
26
13.Grounding Technique and corresponding Circuit Diagram
For a single-story building, the grounding technique is crucial to ensure safety, protect equipment,
and facilitate the dissipation of fault currents. Here is a typical grounding technique for a single-
story building:
Grounding Electrode System:
Components:
Grounding Electrodes:
Ground rods or plates installed at specific locations around the building.
Grounding Conductor: Copper or aluminum conductor connecting the grounding electrodes to
the electrical service entrance.
Grounding Procedure:
Main Service Panel Grounding:
Connect the grounding electrode conductor to the main service panel's grounding bus bar.
Bond the grounding conductor to the building's structural steel if present.
Grounding Electrodes Placement:
Install ground rods or plates around the perimeter of the building.
Place grounding electrodes near utility service entrances and at the corners of the building.
Interconnection of Grounding Electrodes:
Connect all grounding electrodes with the grounding conductor.
Ensure a low-resistance path by burying the grounding electrodes to a sufficient depth.
Equipment Grounding:
Ground all metal equipment, enclosures, and conduits in the building using a dedicated grounding
conductor.
Bond the equipment grounding conductor to the grounding electrode system.
Neutral-Ground Bonding:
Bond the neutral conductor to the grounding electrode system at the main service panel.
Ensure proper bonding between neutral and ground within the main panel.
Surge Protection:
Install surge protectors at key points to prevent damage from electrical surges.
27
Connect surge protectors to the grounding electrode system.
Ground Fault Protection:
Implement ground fault protection devices in the electrical distribution system.
Connect these devices to the grounding system for effective fault current dissipation.
Regular Inspection and Maintenance:
Periodically inspect grounding electrodes for corrosion and ensure a low-resistance path to the
ground.
Verify the integrity of all grounding connections during routine maintenance.
Compliance with Local Codes:
Ensure the grounding system design and installation adhere to local electrical codes and standards.
Documentation:
Maintain accurate documentation of the grounding system, including electrode locations,
conductor sizes, and any modifications made during maintenance.
Figure 9 Symbol of Grounding
28
Figure 10 Connection Diagram of Grounding Technique
29
14. Lightning Protection:
Height of first floor is 3.2 meter. As the building is single storied so, total height of the
building is: 3.2 m
According to BNBC 1.3.33 (Lightning Protection of Buildings)

INDEX TYPE INDEX DETAILS INDEX
Use of Structure Houses and similar buildings 2
Brick, plain concrete, or masonry with nonmetal roof
Type of Construction 4
Ordinary domestic or office building, factories and
Contents or Consequential Effects workshops not containing valuable materials 2
Type of Terrain Index Flat terrain at any level 2

Lightning Prevalence Over 21 21
Summation of index 31
Figure 11 Reference (BNBC Code) of Lightning Protection
Risk Assessment:
According to BNBC 2020 & Section 1.3.33.5

Marginal risk index is 40. As the summation of index is 31, so there is no need of lightning
protection system.
30
15. Fire and Emergency Response:
A building's fire and emergency system includes detectors (smoke, heat), manual call
points, a central control panel, alarm sounders, and cables for wiring. The control panel
monitors zones, triggers alarms, and activates auxiliary commands. Various detectors and
audible/visual alarms are used. Proper grounding techniques and fire-resistant cables
ensure safety. Adherence to standards (BS 5839, BS 7273, EN 54) guides the system's
design and performance. Fire detection zones aid quick identification, and wiring follows
specified methods. The system aims to promptly detect fires, alert occupants, and facilitate
effective emergency responses.
16. Concluding Remarks:
This project, Electrical services design for a single-story building, it's crucial to emphasize
the importance of a comprehensive and compliant approach. Design considerations,
including proper selection of components, adherence to local codes, and the
implementation of effective grounding techniques, play a pivotal role in ensuring the
safety, functionality, and efficiency of the electrical system. Regular inspections,
maintenance, and documentation are essential for long-term reliability.
Concluding on a positive note, once the necessary approvals are obtained, it is anticipated
that this meticulously designed electrical system will deliver a secure, reliable, and efficient
operation within the single-story building. The comprehensive approach, adherence to
standards, and careful consideration of safety measures are expected to contribute to the
system's overall effectiveness
31

Final Report EEE460 f100

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Chittagong University of Engineering and Technology

Department of Electrical and Electronic Engineering

2. Project Type: Private.

Client Name: Md Abdus Satter

Scaling factor = 10:1

Figure 1 Architectural details plan of single stored Building

Where, n = the number of lamps required.

A = area of the working plane height (m2 )

∅ = the average luminous flux from each lamp (lm)

Recommended values of Illumination according to BNBC gadget 2015 &

Assuming utilization factor, 𝑈𝑓 = 0.6 & maintenance factor, 𝑀𝑓 = 0.85

Area: Scaling Factor = 10:1

Dimension of Bed room 300 x 270 mm

= 2.08 𝑢𝑠𝑒 2 𝑓𝑖𝑡𝑡𝑖𝑛𝑔

𝐴 = 𝐿 × 𝑊 = (2.7 × 1.3) 𝑚2 = 3.51 𝑚2

Luminous flux of each 10 W wall mounted (Just above the mirror)

𝑛=1.38 𝑢𝑠𝑒 1 𝑓𝑖𝑡𝑡𝑖𝑛𝑔

Dining (E)= 150 lux

Kitchen Room (Ground Floor):

Dining (E)= 200 lux

Dining (E)= 150 lux (Considering same for dining room)

Stair house (E)= 100 lux

Width of room, W = 0.9 m

Area: 𝐴 = 𝐿 × 𝑊 = (1.2 × 0.9)𝑚2

Porch (E)= 100 lux (Considering same for porch)

Width of room, W = 1.2 m

𝑛 = 0.48, 𝑢𝑠𝑒 1 fitting

Summary of Light Fittings:

Recommended Area of Luminous

Dining Hall (Ground

6. Drawing With Fittings and Fixers:

Figure 3 Symbol of Fittings and Fixers

Figure 5 Legend of Conduit & Electrical Wire

Figure 7 Cabling Drawing

Figure 8 Single Line Diagram with Cable Length

Testing and Commissioning:

11. Load Study Analysis:

Ceiling fan (80 x 1) = 80 watt

Wall Bracket Light (3 x 20) = 60 watt

Concealed spot Lights (1 x 10) = 10 watt

2-Pin 5A Socket (1 x300) =300 watt

3-Pin 15A Socket (1 x1500) =1500watt

Total Loads = 80+60+10+300+1500 = 1950 watts

Include 20 % additional load = 1950 x (20/100) = 390 watt

The complete load is 1950 + 390 = 2340 watt

The incoming supply is 220 volts

Load2 and Load5:

Ceiling fan (80 x 1) = 80 watt

Wall Bracket Light (2 x 20) = 40 watt

Concealed spot Lights (1 x 10) = 10 watt

2-Pin 5A Socket (1 x300)=300 watt

3-Pin 15A Socket (1 x1500)=1500watt

Total Loads = 80+40+10+300+1500 = 1930 watts

Include 20 % additional load = 1930 x(20/100) = 386 watt

The complete load is 1930 + 386 = 2316 watt

The incoming supply is 220 volts

SIT OUT Load Calculation (SB3, Load3):

Wall Bracket Light (1 x 20) = 20 watt

Concealed spot Lights (1 x 10) = 10 watt