ELECTRICAL INSTALLATION OF

RESIDENCE BUILDING
Electrical Design Report
Lighting Requirements

- The design objectives for lighting shall be to provide both good task
visibility and a satisfactory visual environment.

The lighting of workplaces shall ensure good visibility of the visual

-
objects.

The lighting of workplaces shall also be conductive to consentration

- and performance attitudes,contract premature fatigue and permit any
potential hazzards to be clearly recognized.

Illuminance

For indoor workplace that are manned full-time,a minimum rated

- illuminance of 200lx shall be provided unless other factors(such as
nature of operation,physiological reasons)required different values.

For outdoor workplace,circulation area/zoans and work roads,the

- recommended rated illuminance shall provided and they are to be
taken as the recommended values.

Minimum Size ofcopper Earth continuity conductors and

copper earthing leads

Earth
continuity
conductor Earthing Lead
Largest current carrying conductor (mm)2 (mm)2 (mm)2

2.5 2.5 4

4 4 4

6 6 6

10 10 6

16 16 6

25 16 10

35 16 10

50 25 35

70 35 35

95 50 50

120 70 70

150 70 70

185 95 70

240 120 70

300 150 70

400 185 70
 Manhall

Manhole in brick or masonry, internally of 800x800x700 mm

including reinforced concrete cover with lifting lug.

Conduits and Pipes

- PVC pipe of 25 mm diameter.

- PVC pipe of 19 mm diameter.

- PVC pipe of 16 mm diameter.

- PVC pipe of 13 mm diameter.

Feeder Cables
PVC Sheathed and PVC Insulated power cabel type SEMENS
NYY0.6/1KV or equivalent to be drawn inside cement
conduit(measured elsewhere) and of.

- (5X16)sq. mm from EEPCO intake upto MDB of GF

- (5X6)sq. mm from MDB upto SDB, of 1F

- (5X6)sq. mm from MDB upto SDB, of 2F

- (5X6)sq. mm from MDB upto SDB, of 3F

- (3X4)sq. mm from MDB upto SDB, of TF

Low voltage system earthing

Low voltage system earthing 1x16mm² bare copper conductor inside
- PVC conduit of 110 mm diameter
(measured elsewhere)from MDB earth terminal bar to copper clad
steel earthing rod of 2400x16mm in manhole

Breaker(take from cable size)

- 1 pc main MCCB of 60A/3P

- 2 pc ACB of 25A/3P

- 1 pc ACB of 20A/3P

Switches : -
(TYPE LEGRAND SUNO OR EQUIVALENT)

- Flush mounting single switch, 7740 01 + 71850

- Flush mounting 2 gang single switch, 7740 05 + 71850

- Flush mounting two-way switch, 7740 06 + 71850

- Flush mounting intermediate switch, 7740 04 + 71850

 Socket outlet points
10-16A/1P flush mounted socket outlet points fed through PVC
insulated conductors of 3x2.5mm² inside PVC conduits of 16mm
- diameter including junction boxes with covers and insulating screw
cap connectors.

20A/1P flush mounted general power socket outlet ponts fed through
- PVC insulated conductors of 3x4mm² inside PVC conduits of 25mm
diameter including junction boxes with covers and insulating screw
cap connectors for electric stove.

- Flush mounting socket outlet of 10-16A/1P, 7740 20 + 71850.

- Ditto, but with switch for water heaters 3x2.5mm2 16A

- Flush mounting socket outlet of 10-16A/1P twin, 7740 25+ 71851.

- Flush mounting socket outlet of 20A/1P For Electric Stove

Telecom points

- Telephone points only conduit of 19mm diameter including junction boxes with covers
e.t.c as per ETC reqirement

- Telephone box 300x200x100mm

T.V. System
TV points fed through co-axial TV cables inside PVC conduits of
-
25mm diameter including junction boxes with covers, insulating
screw cap connectors, and flush mounted terminal TV sockets .

- TV box 300x200x100

Bell call system

Bell call points fed through PVC insulated conductors of

- 2x0.8mm², inside PVC conduits of 20mm diameter , including
junction boxes with covers and insulating screwcap connectors.

- Bell call indicator panel of 29 numbers complete with 220/(8-

24v), 25VA transformer

Light fittings and lamps

(Specified type or equivalent)

- Flush mounted light points fed through PVC insulated conductors of

2x2.5 mm² inside PVC conduits of 16mm diameter, including
junction boxes with covers insulating screw cap connectors.

Wall mounted light points fed through PVC insulated conductors of

- 2x2.5 mm² inside PVC conduits of 16mm diameter, including
junction boxes with covers insulating screw cap connectors.

- MASSIVE 32064/31/10 E14/max 60W

- MASSIVE 34020/11/10E14/Max 40W

- TMS 012/136+ 2XTLD 36W LAMP

- RZB 10112.002 WITH C35 40W LAMP

- MASSIVE 36800/48/10 G32/max 11W PL

- MASSIVE CELO 33132/17/10 2XGU10 Max 50W/230V

- RZB 61485.963 WITH TC-D 18W LAMP

Determining cable size ,breaker size,socket power ,Illumination of rooms &
number of fittings

Socket Design
Since we are calculating the real(active) power,first we are
considering 200 KWatt for each single phase socket

outlet, so from circit breaker;

on GROUND floor (SDB - GF);

from circit breaker no 1 we have 10 socket outlets there fore the
Residence power becomes;
P=10*200KWatt=2000watt=2.0Kwatt

on FIRST- floor (SDB - 1F);

from circit breaker no 2 we have 13 socket outlets there fore the
Residence power becomes;
P=13*200KWatt=2600watt=2.6Kwatt

on SECOND floor (SDB - 2F);

from circit breaker no 3 we have 14 socket outlets there fore the
Residence power becomes;
P=14*200KWatt=2600watt=2.8Kwatt

on THERD floor (SDB - 3F);

from circit breaker no 4 we have 14 socket outlets there fore the
Residence power becomes;
P=14*200KWatt=2000watt=2.8Kwatt

on TERRACE
from floor
circit breaker no (SDB-TF);
5 we have 10 socket outlets there fore the
Residence power becomes;
P=10*200KWatt=2000watt=2.0Kwatt

E = φrec
A
 where E is illuminatin level required at the work surface and A is
THE total area of the plane where the
work is done.The factor φrec is the flux of light recived n the
working surface.

The received flux is related to the nstalled flux by a simple formula:

where
MF = Maintainance factor LLF(Light Loss factor)

UF=Utilization factor

φinst=the installed flux

In order to get the utilizatin factor from the data sheet we need to
calculate the room index using the
following formula:
RI = L x W
Hm x (L+W)
where
L=Length of Room

W=Width of room
Hm=mounting height,i.e. the vertical distance b/n the working plane
and the luminaire.

The MF gives an estimate of how lighting conditions will deteriorate

through use.some factors are:

- dust and durt inside luminaire surfaces

- Aging oflight bulbs emitting less light

- cleaning of room surfaces,e.g.ceiling

without detailed knowledge of maintenance plane,one sets MF=0.8

Let us calculate the number of fittings(N)and illumination level(E) of

each room @ ground & first.Here we consider white ceiling and light
coloured walls.
 2. Power Amperage and cable cross
section calculation

Panel Name: SDB –GF N = Number of lights/ sockets in the circuit P = Power in KW of units in the circuit
Circuit No Type of fittings power (K.W) Type of sockets and auxiliary Units Power Current (A) Cable /wire
( Standard) Cross
Section
(mm2)
(KW) P=∑,p1xN
1( KW)

1 2 3 Sockets Water Bell Stove I.Mitad Reserve

heater
p1 P2 P3 P4 P5 P6 P7 P8 P9 P10
0.06 0.018 0.036 0.2 1.5 0.05 2.5 3
1 N1 10 600 16 3x 2.5
2 N2 9 540 16 3 x 2.5
3 N₄ 6 360 16 3x 2.5
4 N₄ 5 1000 16 3x 2.5
5 N₅ 5 1000 16 3 x 2.5
7 N6 Water Heater 1 1500 16 3 x 2.5

8 N6 STOVE 1 3000 19 3 x 4

9 N6 STOVE 1 3000 19 3 x 4

10 N6 INJERA MTHAD 1 3000 19 3 x 4

11 N8 Power to SDB- 1F 13.52 3 x 25 5x6

12 N8 Power to SDB- 2F 13.18 3 x 20 5x6

13 N9 Power to SDB- 3F 13.18 3 x 20 5x6

14 N10 Power to SDB- TF 4.4 1 x 20 3x4

15 N15
16 N16 Reserve
Total Power 10% tolerance ( KW) 58.28
Total Power with diversity factor of 0.7( KW) 40.79 3x63 5x16

Panel Name: SDB –1F- N = Number of lights/ sockets in the circuit P = Power in KW of units in the circuit
Circuit No Type of fittings power (K.W) Type of sockets and auxiliary Units Power Current (A) Cable /wire
( Standard) Cross
Section
(mm2)
(KW) P=∑,p1xN
1( KW)

1 2 3 Sockets Water Bell Stove I.Mitad Reserve

heater
p1 P2 P3 P4 P5 P6 P7 P8 P9 P10
0.06 0.018 0.036 0.2 1.5 0.05 2.5 3
1 N1 9 540 16 3x 2.5
2 N2 8 480 16 3 x 2.5
3 N₄ 5 1000 16 3x 2.5
4 N₅ 3 600 16 3 x 2.5
5 N₄ 5 1000 16 3x 2.5
6 N6 Water Heater 1 1500 16 3 x 2.5

7 N6 Water Heater 1 1500 16 3 x 2.5

8 N6 Water Heater 1 1500 16 3 x 2.5

9 N15
10 N16 Reserve
Total Power 10% tolerance ( KW) 13.52
Total Power with diversity factor of 0.8( KW) 10.81 3x25 5x6

Panel Name: SDB –2F- N = Number of lights/ sockets in the circuit P = Power in KW of units in the circuit
Circuit No Type of fittings power (K.W) Type of sockets and auxiliary Units Power Current (A) Cable /wire
( Standard) Cross
Section
(mm2)
(KW) P=∑,p1xN
1( KW)

1 2 3 Sockets Water Bell Stove I.Mitad Reserve

heater
p1 P2 P3 P4 P5 P6 P7 P8 P9 P10
0.06 0.018 0.036 0.2 1.5 0.05 2.5 3
1 N1 11 660 16 3x 2.5
2 N2 12 720 16 3 x 2.5
3 N₄ 4 800 16 3x 2.5
4 N₅ 4 800 16 3 x 2.5
5 N₄ 3 600 16 3x 2.5
6 N₄ 3 600 16 3x 2.5
7 N6 Water Heater 1 1500 16 3 x 2.5

8 N6 Water Heater 1 1500 16 3 x 2.5

9 N6 STOVE 1 3000 19 3 x 4

10 N6 INJERA MTHAD 1 3000 19 3 x 4

11 N15
 12 N16 Reserve
Total Power 10% tolerance ( KW) 13.18
Total Power with diversity factor of 0.8( KW) 10.54 3x25 5x6

Panel Name: SDB –3F- N = Number of lights/ sockets in the circuit P = Power in KW of units in the circuit
Circuit No Type of fittings power (K.W) Type of sockets and auxiliary Units Power Current (A) Cable /wire
( Standard) Cross
Section
(mm2)
(KW) P=∑,p1xN
1( KW)

1 2 3 Sockets Water Bell Stove I.Mitad Reserve

heater
p1 P2 P3 P4 P5 P6 P7 P8 P9 P10
0.06 0.018 0.036 0.2 1.5 0.05 2.5 3
1 N1 11 660 16 3x 2.5
2 N2 12 720 16 3 x 2.5
3 N₄ 4 800 16 3x 2.5
4 N₅ 4 800 16 3 x 2.5
5 N₄ 3 600 16 3x 2.5
6 N₄ 3 600 16 3x 2.5
7 N6 Water Heater 1 1500 16 3 x 2.5

8 N6 Water Heater 1 1500 16 3 x 2.5

9 N6 STOVE 1 3000 19 3 x 4

10 N6 INJERA MTHAD 1 3000 19 3 x 4

11 N15
12 N16 Reserve
Total Power 10% tolerance ( KW) 13.18
Total Power with diversity factor of 0.8( KW) 10.54 3x25 5x6
Panel Name: SDB –TF- N = Number of lights/ sockets in the circuit P = Power in KW of units in the circuit
Circuit No Type of fittings power (K.W) Type of sockets and auxiliary Units Power Current (A) Cable /wire
( Standard) Cross
Section
(mm2)
(KW) P=∑,p1xN
1( KW)

1 2 3 Sockets Water Bell Stove I.Mitad Reserve

heater
p1 P2 P3 P4 P5 P6 P7 P8 P9 P10
0.06 0.018 0.036 0.2 1.5 0.05 2.5 3
1 N1 8 480 16 3x 2.5
2 N2 7 420 16 3 x 2.5
4 N₄ 4 800 16 3x 2.5
5 N₅ 3 600 16 3 x 2.5
6 N₄ 3 600 16 3x 2.5
9 N6 Water Heater 1 1500 16 3 x 2.5

14 N15
15 N16 Reserve
Total Power 10% tolerance ( KW) 4.4
Total Power with diversity factor of 0.8( KW) 3.52 1x20 3x4
 Illumination Level Calculation
GROUND FLOOR

S/N Room Room area M2 Illumination level ( lumen ) maintenance Utilization Lumen output of No lamps= No lamps
Description (A) Standards ( EBCS-10)(E) factor Factor L=lamp (ø ) ExA/Ufx
Mf x ø
1 G.F
1.1 LIVING 50.00 100 0.8 0.45 1250 1 8
AREA

1.2 M.KITCHE 9.00 500 0.8 0.65 3500 1 1

N
1.3 T.KITCHEN 9.00 500 0.8 0.65 3500 1 1
1.4 BED ROOM 5.00 100 0.8 0.45 1250 1 1
1.5 STORE 3.00 100 0.8 0.45 1250 1 1
1.6 CORRIDOR 11.00 100 0.8 0.45 1250 1 2
1.7 CORRIDOR 10.00 100 0.8 0.45 1250 1 1
1.8 VERENDA 8.00 100 0.8 0.45 1250 1 1
1.9 VERENDA 8.00 100 0.8 0.45 1250 1 1

since the total power connected is three phase.the power is given by

P= I x V x cosϴ

where cosϴ is 0.8 and current

Imax= Pmax/31/2*Vmax*cosϴ

Pmax= 40.79kwatt

for three Vmax= 380V STANDARD

phase
Imax= 40.79kwatt/1.73*380V*0.8

Imax= 77.5A

CB› Imax STANDARD

hint :-CB=circuit breaker(I)

I= 63A

Cable size from standard:- 5x16mm

FIRST FLOOR

S/N Room Room area M2 Illumination level ( lumen ) maintenance Utilization Lumen output of No lamps= No lamps
Description (A) Standards ( EBCS-10)(E) factor Factor L=lamp (ø ) ExA/Ufx
Mf x ø

2 1F
2.1 M.BED 42.00 100 0.8 0.45 1250 1 3
ROOM

2.2 BED ROOM 12.00 100 0.8 0.45 1250 1 1

2.3 BED ROOM 11.00 100 0.8 0.45 1250 1 1
2.4 BED ROOM 12.00 100 0.8 0.45 1250 1 1
2.5 CORRIDOR 10.00 100 0.8 0.45 1250 1 2
2.6 CORRIDOR 10.00 100 0.8 0.45 1250 1 1
2.7 BATH 11.50 100 0.8 0.45 1250 1 2
ROOM
2.8 TOILET 2.50 100 0.8 0.45 1250 1 2
2.9 TOILET 2.50 100 0.8 0.45 1250 1 2
3 BALCONY 2.25 100 0.8 0.45 1250 1 1

since the total power connected is three phase.the power is given by

P= I x V x cosϴ

where cosϴ is 0.8 and current

Imax= Pmax/31/2*Vmax*cosϴ

Pmax= 10.814watt

for three Vmax= 380V STANDARD

phase

Imax= 10..81kwatt/1.73*380V*0.8

Imax= 20.5A

CB› Imax STANDARD

hint :-CB=circuit breaker(I)

I= 25A

Cable size from standard:- 5x6mm

SECOND FLOOR

S/N Room Room area M2 Illumination level ( lumen ) maintenance Utilization Lumen output of No lamps= No lamps
Description (A) Standards ( EBCS-10)(E) factor Factor L=lamp (ø ) ExA/Ufx
Mf x ø
3.1 2F
3.2 LIVING&DI 30.00 100 0.8 0.45 1250 1 9
NING

3.3 CORRIDOR 4.00 100 0.8 0.45 1250 1 1

3.4 M.KITCHEN 8.00 500 0.8 0.65 3500 1 1

3.5 KITCHEN 6.00 500 0.8 0.65 3500 1 1

STORE
3.6 TOILET 2.50 100 0.8 0.45 1250 1 2
3.7 TOILET 2.50 100 0.8 0.45 1250 1 2
3.8 TOILET 3.20 100 0.8 0.45 1250 1 2
3.9 BED ROOM 12.00 100 0.8 0.45 1250 1 1
4 BED ROOM 11.00 100 0.8 0.45 1250 1 1
4.1 BED ROOM 12.00 100 0.8 0.45 1250 1 1
4.2 BALCONY 2.40 100 0.8 0.45 1250 1 1
4.3 BALCONY 2.40 100 0.8 0.45 1250 1 1
 since the total power connected is three phase.the power is given by

P= I x V x cosϴ

where cosϴ is 0.8 and current

Imax= Pmax/31/2*Vmax*cosϴ

Pmax= 10.54watt

for three Vmax= 380V STANDARD

phase

Imax= 10.54kwatt/1.73*380V*0.8

Imax= 20.0A

CB› Imax STANDARD

hint :-CB=circuit breaker(I)

I= 25A

Cable size from standard:- 5x6mm

THRDE FLOOR

S/N Room Room area M2 Illumination level ( lumen ) maintenance Utilization Lumen output of No lamps= No lamps
Description (A) Standards ( EBCS-10)(E) factor Factor L=lamp (ø ) ExA/Ufx
Mf x ø

4.4 3F `
4.5 LIVING&DI 30.00 100 0.8 0.45 1250 1 9
NING

4.6 CORRIDOR 4.00 100 0.8 0.45 1250 1 1

4.8 M.KITCHEN 8.00 500 0.8 0.65 3500 1 1

4.9 KITCHEN 6.00 500 0.8 0.65 3500 1 1

STORE
5 TOILET 2.50 100 0.8 0.45 1250 1 2
5.1 TOILET 2.50 100 0.8 0.45 1250 1 2
5.2 TOILET 3.20 100 0.8 0.45 1250 1 2
5.4 BED ROOM 12.00 100 0.8 0.45 1250 1 1
5.5 BED ROOM 11.00 100 0.8 0.45 1250 1 1
5.6 BED ROOM 12.00 100 0.8 0.45 1250 1 1
5.7 BALCONY 2.40 100 0.8 0.45 1250 1 1
5.8 BALCONY 2.40 100 0.8 0.45 1250 1 1

since the total power connected is three phase.the power is given by

P= I x V x cosϴ

where cosϴ is 0.8 and current

Imax= Pmax/31/2*Vmax*cosϴ

Pmax= 10.54watt

for three Vmax= 380V STANDARD

phase

Imax= 10.54kwatt/1.73*380V*0.8

Imax= 20.0A

CB› Imax STANDARD

hint :-CB=circuit breaker(I)

I= 25A

Cable size from standard:- 5x6mm

TERRACE FLOOR

S/N Room Room area M2 Illumination level ( lumen ) maintenance Utilization Lumen output of No lamps= No lamps
Description (A) Standards ( EBCS-10)(E) factor Factor L=lamp (ø ) ExA/Ufx
Mf x ø
5.9 TF
6 TERRACE 52.00 100 0.8 0.45 1250 1 5
6.1 GYM 11.00 100 0.8 0.45 1250 1 2
6.2 BED ROOM 11.00 100 0.8 0.45 1250 1 1
6.3 CORRIDOR 4.50 100 0.8 0.45 1250 1 1
6.4 CORRIDOR 4.00 100 0.8 0.45 1250 1 1
6.5 SAUNA 5.00 100 0.8 0.45 1250 1 1
6.6 STEAM 4.00 100 0.8 0.45 1250 1 1
6.6 TOILET 2.50 100 0.8 0.45 1250 1 2

since the total power connected is single phase.the power is given by

P= I x V x cosϴ

where ϴ is 0 and current

Imax= Pmax/Vmax hint:- cosϴ=1

Pmax= 3.52KW

for single Vmax= 220V STANDARD

phase

Imax= 3..52kwatt/220V

Imax= 15.8A

CB› Imax STANDARD

hint :-CB=circuit breaker(I)

I= 20A

Cable size from standard:- 3x4mm