ELECTRICAL DESIGN REPORT

Electrical Design Report for

MIXED USE 2B+G+7HOTEL

Building
Sub-city:- MEKELE ADIHAKI

Design code: ES-3961/2015

Owner: SHAMBEL ASAY G/MEDHIN

Prepared By: FASIL W/G, PPEE-031

JULY, 2020

PREPARED BY: FASIL W/G PPEE 031 Page

0
 ELECTRICAL DESIGN REPORT

Content
1. Introduction

2. Illumination level

3. Luminary Calculation

4. Power Calculation

5. A.C.B Calculation

6. Position of fitting

PREPARED BY: FASIL W/G PPEE 031 Page

1
 ELECTRICAL DESIGN REPORT

Electrical Design Report

The requirements of installation are mainly dependent up on the type of
work to be carried out in the space in question. The no of Luminaries for
the space is calculated by taking in to account of the visual task to be
carried out in the space, the area of the space, reflection factor of the
ceiling wall and working plane and the room index and also the
maintenance factor.

In all case the reflectance of ceiling wall and working plan are taken
to be 0.7, 0.5, 0.3 respectively maintenance factor of 0.8 are taken.

For all residence RZB type incandescent Luminaries are used. The
following illumination level is taken for various type of visual task to be
carried out.

No. Visual Task Average Illumination (Lux)

1 Office /shop 300

2 Kitchen 500

3 Bed room 150

4 Car parking 150

5 Toilet 100

6 Store 200

7 Corridor /Lobby/ 100

8 Balcony 100

9 Living/ dining 200

10 restaurant 200

PREPARED BY: FASIL W/G PPEE 031 Page

2
 ELECTRICAL DESIGN REPORT

The room index is calculated from

K = LXW
H (L+W)
Where; L = room length
W = Room width
H = Mounting height of the laminar

Lumen per fixtures

Ø=Efficency X each lamp watt

Number of fixtures
EXA
NO . fixture=
UF X MF X Ø

Ø The total luminous flux of lamp

E Average illumination

A Area of working space

UF utilization factor (0.69)

MF Maintenance Factor (0.63)

UF is found from photo metric DATA of chosen luminary.

Space height ratio taken is 1.25 and each lamp has an initial output efficiency of 85 lumen per
watt.

Each room has height of 3 meter and the ceiling to desk height is 2 meters.

So based on this calculative we can determine the number of lemonier (lamp) for every room.

PREPARED BY: FASIL W/G PPEE 031 Page

3
 ELECTRICAL DESIGN REPORT

1ST/ BASEMENT FLOOR

PARKING

Ø = Efficiency X each lamp watt = 85 X 36W = 3060Lum

EXA 150 X 150
NO . fixture= =
UF X MF X Ø 0.4 X 3060
= 18, to use eighteenth lamps at the
ceiling.
2nd/ BASEMENT FLOOR
L .changing

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 100 X 15.2
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 2, to use two lamps at the ceiling .

G .changing

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 100 X 15.2
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 2, to use two lamps at the ceiling .

Staff Dining

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 200 X 17.5
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 5, but we recommended to use four lamps
at the ceiling.
Laundry

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 200 X 28.9
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 8, but we recommended to use seventh
lamps at the ceiling.

Time keeper

PREPARED BY: FASIL W/G PPEE 031 Page

4
 ELECTRICAL DESIGN REPORT

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 1 00 X 5.2
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 1, to use one lamps at the ceiling.

Store

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 100 X 15.9
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 2, to use two lamps at the ceiling.

Generator

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 100 X 13.2
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 2, to use two lamps at the ceiling.

Corridor

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 100 X 41.8
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 6, to use sixth lamps at the ceiling.

GROUND FLOOR
L. toilet

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 100 X 37 .8
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 4, to use two lamps at the ceiling and
two mirror lamps.

G. toilet

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 100 X 37.8
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 4, to use two lamps at the ceiling and
two mirror lamps.
Store
PREPARED BY: FASIL W/G PPEE 031 Page
5
 ELECTRICAL DESIGN REPORT

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 100 X 6.4
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 1, to use one lamps at the ceiling.

Office

Ø = Efficiency X each lamp watt = 85 X 36W = 3060Lum

EXA 300 X 9
NO . fixture= =
UF X MF X Ø 0.4 X 3060
= 2 but we recommended to use one
lamps at the ceiling.
Lobby reception

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 100 X 67.6
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 9, to use ninth lamps at the ceiling.

Lift lobby

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 100 X 8.4
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 1 to use one lamps at the ceiling.

MEZZANINE FLOOR
Restaurant

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 200 X 55.2
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 16, to use sixteenth lamps at the
ceiling.
Lift lobby

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

PREPARED BY: FASIL W/G PPEE 031 Page

6
 ELECTRICAL DESIGN REPORT

EXA 100 X 8.4

NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 1 to use one lamps at the ceiling.

Kitchen

Ø = Efficiency X each lamp watt = 85 X 36W =3060Lum

EXA 500 X 37.2
NO . fixture= =
UF X MF X Ø 0.4 X 3060
= 15, but we recommend to use
twowelveth lamps at the ceiling.
Pantry

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 100 X 14.5
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 2 to use two lamps at the ceiling.

FIRST FLOOR
Secretory

Ø = Efficiency X each lamp watt = 85 X 36W =3060Lum

EXA 3 00 X 10.9
NO . fixture= =
UF X MF X Ø 0.4 X 3060
= 2 to use two lamps at the ceiling.

M. office

Ø = Efficiency X each lamp watt = 85 X 36W =3060Lum

EXA 300 X 15.2
NO . fixture= =
UF X MF X Ø 0.4 X 3060
= 3 to use three lamps at the ceiling.

Lift lobby

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 100 X 16
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 2 to use two lamps at the ceiling.

Corridor

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 100 X 24.5
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 4 to use three lamps at the ceiling.
PREPARED BY: FASIL W/G PPEE 031 Page
7
 ELECTRICAL DESIGN REPORT

L. changing

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 100 X 37.2
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 5 to use fifth lamps at the ceiling.

G. changing

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 100 X 37.2
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 5 to use fifth lamps at the ceiling.

Pool office

Ø = Efficiency X each lamp watt = 85 X 36W =3060Lum

EXA 300 X 37.2
NO . fixture= =
UF X MF X Ø 0.4 X 3060
= 9 to use ninth lamps at the ceiling.

SECOND-SEVENTH FLOOR
SDB- A-D
Bed room

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 150 X 21.6
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 4, to use one lamps at the ceiling and
three wall mounted lamps.
Bath

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 100 X 3.1
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 1, but we recommended to use one lamps
at the ceiling and one mirror lamps.
SDB- E

PREPARED BY: FASIL W/G PPEE 031 Page

8
 ELECTRICAL DESIGN REPORT

Twin room

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 150 X 29.9
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 6, but we recommended to use one lamps
at the ceiling and four wall mounted lamps.
Bath

Ø = Efficiency X each lamp watt = 85 X 20W = 1700Lum

EXA 100 X 3.7
NO . fixture= =
UF X MF X Ø 0.4 X 1700
= 1, but we recommended to use one lamps
at the ceiling and two mirror lamps.

Power calculation
Power is calculated for each distribution board by taking in to account the
power of each incandescent lamp having an actual power of less than 100 VA
to be 100 VA for incandescent lamp having more than 100 VA actual proper is
taken for single and double flour sent lamp power of 100 & 200 VA are taken
respectively.
To calculate the rating of ACB and cable size or single phase I = P
V
Pmax
For three phase I=
( √ 3 x 380 ) X cos θ
For each normal socket outlet a power of 200 VA is taken power of 1500 VA &
3000 VA are taken for water heater and socket cooker (coffee machine)
respectively.
Power calculation SDB- 1st /BF

PREPARED BY: FASIL W/G PPEE 031 Page

9
 ELECTRICAL DESIGN REPORT

Power for lighting [(6X36W)] =0.216KW

Power for lighting [(6X36W)] =0.216KW
Power for lighting [(6X36W)] =0.216KW
Power for lighting [(5X36W)] =0.180KW
Power for socket outlet 1X200X5=1.0KW
Total power for SDB- 1st/BF
0.216KWX3 + 0.180KW+1.0KW =1.828KW
Total Power = 1.828KW
D.F = 0.9
S (tot): 1.828KW /0.8= 2.285KVA
Pmax: 1.828KW X0.9 =1.645KW
1645W
I¿ = 9.34A, but we select the next higher 20A
220
Rating of A.CB =1X20A
Rating of cable size 3x4mm2 according to the size of A.C.B
Power calculation SDB- 2nd /BF
Power for lighting [(13X20W)+(9X11W)] =0.359KW
Power for lighting [(10X20W)] =0.200KW
Power for lighting [(9X20W)] =0.180KW
Power for lighting [(7X20W)] =0.140KW
Power for lighting [(9X20W)] =0.180KW
Power for socket outlet 1X200X4=0.8KW
Power for socket outlet 1X200X5=1.0KW
Power for laundry 1X18000W=18.0 KW
Power for laundry machine 1X18000W=18.0 KW
Power for ironing machine1X18000W=16.0 KW
Total power for SDB- 2nd/BF

PREPARED BY: FASIL W/G PPEE 031 Page

10
 ELECTRICAL DESIGN REPORT

0.359KW+0.200KW+0.180KWX2+0.140KW+0.8KW+1.0KW+18.0KWX2+1
6.0KW =54.859KW
Total Power = 54.859KW
D.F = 0.9
S (tot): 54.859KW /0.8= 68.573KVA
Pmax: 54.859KW X0.9 =49.373KW
49373 W
I¿ = 93.7A, but we select the next higher 100A
( √ 3 x 380 ) X 0.8
Rating of A.CB =3X100A
Rating of cable size 3x35/16mm2 according to the size of A.C.B

Power calculation SDB- GF

Power for lighting [(12X20W)] =0.240KW
Power for lighting [(11X20W)(1X36W)] =0.256KW
Power for lighting [(12X20W)] =0.240KW
Power for socket outlet 1X200X6=1.2KW
Power for socket outlet 1X200X5=1.0KW
Power for socket outlet 1X200X5=1.0KW
Total power for SDB- GF
0.240KW + 0.256KW+0.240KW+1.2KW+1.0KWX2 =3.936KW
Total Power = 3.936KW
D.F = 0.9
S (tot): 3.936KW /0.8= 4.920KVA
Pmax: 3.936KW X0.9 =3.542KW

PREPARED BY: FASIL W/G PPEE 031 Page

11
 ELECTRICAL DESIGN REPORT

3542W
I¿ = 20.1A, but we select the next higher 25A
220
Rating of A.CB =1X25A
Rating of cable size 3x4mm2 according to the size of A.C.B
Power calculation SDB- MF
Power for lighting [(3X20W)+(6X36W)] =0.276KW
Power for lighting [(6X36W)] =0.216KW
Power for lighting [(8X20W)] =0.160KW
Power for lighting [(12X20W)] =0.240KW
Power for socket outlet 1X200X5=1.0KW
Power for socket outlet 1X200X4=0.8KW
Power for stove 1X3000W=3.0 KW
Power for stove 1X3000W=3.0 KW
Power for smoke succor 1X3000W=2.0 KW
Total power for SDB- MF
0.276KW+0.216KW+0.160KW+0.240KW+1.0KW+0.8KW+3.0KWX2+2.0K
W =10.692KW
Total Power = 10.692KW
D.F = 0.9
S (tot): 10.692KW /0.8= 13.365KVA
Pmax: 10.692KW X0.9 =9.622KW
9622 W
I¿ = 18.2A, but we select the next higher 25A
( √ 3 x 380 ) X 0.8
Rating of A.CB =3X25A
Rating of cable size 5x6mm2 according to the size of A.C.B
Power calculation SDB- 1F
Power for lighting [(5X36W)] =0.180KW
Power for lighting [(9X20W)] =0.180KW

PREPARED BY: FASIL W/G PPEE 031 Page

12
 ELECTRICAL DESIGN REPORT

Power for lighting [(9X36W)] =0.324KW

Power for lighting [(10X20W)] =0.200KW
Power for socket outlet 1X200X5=1.0KW
Power for socket outlet 1X200X4=0.8KW
Power for sauna 1X14000W=14.0 KW
Power for sauna 1X14000W=14.0 KW
Power for stove 1X13000W=13.0 KW
Power for stove 1X13000W=13.0 KW
Total power for SDB- 1F
0.180KWX2+0.324KW+0.200KW+1.0KW+0.8KW+14.0KWX2+13.0KW X2
=56.684KW
Total Power = 56.684KW
D.F = 0.9
S (tot): 56.684KW /0.8= 70.855KVA
Pmax: 56.684KW X0.9 =51.015KW
51015 W
I¿ = 96.9A, but we select the next higher 100A
( √ 3 x 380 ) X 0.8
Rating of A.CB =3X100A
Rating of cable size 3x35/16mm2 according to the size of A.C.B
Power calculation SDB- 2-7FA-D
Power for lighting [(6X20W)] =0.120KW
Power for socket outlet 1X200X5=1.0KW
Total power for SDB- 2-7FA-D
0.120KW +1.0KW =1.120KW
Total Power = 1.120KW
D.F = 0.9
S (tot): 1.120KW /0.8= 1.400KVA
Pmax: 1.120KW X0.9 =1.008KW

PREPARED BY: FASIL W/G PPEE 031 Page

13
 ELECTRICAL DESIGN REPORT

1008W
I¿ = 5.72A, but we select the next higher 20A
220
Rating of A.CB =1X20A
Rating of cable size 3x4mm2 according to the size of A.C.B
Power calculation SDB- 2-7F-E
Power for lighting [(8X20W)] =0.160KW
Power for socket outlet 1X200X4=0.8KW
Total power for SDB- 2-7F-E
0.160KW +0.8KW =0.960KW
Total Power =0.960KW
D.F = 0.9
S (tot): 0.960KW /0.8= 1.200KVA
Pmax: 0.960KW X0.9 =0.864KW
0864 W
I¿ = 4.90A, but we select the next higher 20A
220
Rating of A.CB =1X20A
Rating of cable size 3x4mm2 according to the size of A.C.B
Power calculation MDB
TO SDB-1ST/BF =1.828KW
TO SDB-2ND/BF =54.859KW
TO SDB-GF =3.936KW
TO SDB-MF =10.692KW
TO SDB-1F=56.684KW
TO SDB-2F =2.240KW
TO SDB-3F =2.240KW
TO SDB-4F =2.240KW
TO SDB-5F =2.240KW
TO SDB-6F=2.240KW

PREPARED BY: FASIL W/G PPEE 031 Page

14
 ELECTRICAL DESIGN REPORT

TO SDB-7F =2.240KW
TO LIFT =18.0KW
TO DP/BF =18.0KW
TO FP/BF =17.8KW
TO CENTERAL WATER HETAR = 18.0KW
Total power for MDB =
1.828KW+54.859KW+3.936KW+10.692KW+56.684KW+2.240KW
X6+18.0KWX3 +17.8KW =213.239KW
Total power for MDB =213.239KW
D.F = 0.9
S (tot): 213.239KW /0.8= 266.548KVA
Pmax: 213.239KW X0.9 = 191.915KW
191915W
I¿ = 364.5A, but we select the next higher 400A
( √ 3 x 380 ) X cos θ
Rating of A.CB =3X400A
Rating of cable 2(3X95/50+1X50) mm2
To check a voltage drop from MDB to KWHM and from MDB to SDB is
very short less than 10 meter so no need of checking voltage drop.
LOCATION OF OUT LETS
All dimension is measured from F.F level
Switch =1:30 cm
Junction box = 20 cm
Socket out lets =30 cm
Control Board =1:80cm
Bed size Switch =1m
Water Heater =170m
Stove =30cm
Kitchens socket =1:10m

PREPARED BY: FASIL W/G PPEE 031 Page

15
 ELECTRICAL DESIGN REPORT

Bell Push-button: = 1m
Bell Indicate =1:70 cm
So we can use four corner lamps and to ceiling lamp with four down light
each.
Socket Point

One Normal Socket are provided for each table and bed in every room TV
sockets are provided in each room where TV to be installed.

Bed Room Three ordinary socket

Living & Dining Five ordinary socket

Master Bed Room three or four ordinary socket

Corridor one ordinary socket

Toilet one ordinary socket and one power socket for water heater

Master Base one ordinary socket and two power socket for water heater
and Jacuzzi.

Telephone Point

Telephone points are providing in each room conduit of 19/29mm

diameter are to be installed for Telephone Wire /Cable is for ETC
regulation.

Heat and smoke detectors

surface mounted smoke detector are providing in each room conduit of

16/19mm diameters are to be installed and heat detector are providing
were more heat is supposed to be there like kitchen garage factory etc.

PREPARED BY: FASIL W/G PPEE 031 Page

16
 ELECTRICAL DESIGN REPORT

the sounder is located at the corridor and it is advisable to install 30cm

below ceiling .

Lighting protection

Type and size of lighting protection are decided according to the size and
type of building that we are supposed to be constructed mean that to
determine radios of coverage of protection surface for this project we
preferred to installed a lighting protection which has a capacity of
coverage more than 30mm mounted roof conductor 1X50mm air
terminals rod 15X1200mm 1X35mm down conductor 16X2400mm earth
rod air terminal device preventer p-4or si-60 or equivalent mounted mast
6m height mast support gay -wire

Distribution Board

Plush mounted distribution board containing only miniature automatic

ckt breaker are installed at accessible point even in main Distributions
board the newly designed is according to the total power required to
designed the type of ckt breaker.

Power Calculative

Power is calculated for each distribution board by taking in to account

the power of each incandescent lamp having an actual power of less than
100 VA to be 100 VA for incandescent lamp having more than 100 VA
actual proper is taken for single and double flour sent lamp power of 100
& 200 VA are taken respectively.

To calculate the rating of ACB and cable size or single phase I = P

V

PREPARED BY: FASIL W/G PPEE 031 Page

17
 ELECTRICAL DESIGN REPORT

Pmax
For three phase I=
( √ 3 x 380 ) X cos θ
For each normal socket outlet a power of 200 VA is taken power of 1500
VA & 3000 VA are taken for water heater and socket cooker (coffee
machine/ respectively/
Scope of the Work

The scope of the work to be covered by the contractor including the

supply & installation of all material, equipment all other. Faculty
necessary for proper and effective operation of electrical system specified
here in the bill of quantities and indicated with drawing.

General Requirement

Installation shall be carried out in accordance with the Ethiopia electrical

power corporation (EEPCOLs) the Ethiopian Telecommunication
corporation (ETC) rule and regulation.

The Ethiopia Electric power corporation supplied power to the main

distribution board with 3 phase 4 wire 380 V/220V 50HZ system. All
material and equipment for this supply connection and measuring
instrument for consumption of power shall be supplied by EEPCO’s the
electrical work including here is shall be excited in the best and most
effective manner and to be completed satisfaction of the engineer who
shall have a power to reject any work and material which is his judgment
are not in a full accordance with the drawing and specification.

PREPARED BY: FASIL W/G PPEE 031 Page

18
 ELECTRICAL DESIGN REPORT

No change shall be done any part of the design without prior

approval of the consultant engineer the work shall meet all requirement
of neat good work man ship and be performed by skilled election who
possess the appropriate classification field of competence issued by
EEPCOs.

PREPARED BY: FASIL W/G PPEE 031 Page

19