electrical estimating and costing

PROBLEM

Wiring, Estimation and Costing of PHARMACY BLOCK (first floor).

ASSUMPTIONS

(a) Total height of ceiling from floor = 4 mts(b) Height of horizontal run from floor = 2.5 mts(c) Height of SB’s and MB from floor = 1.5 mts(d) Height of bed side switch board from floor=1.5mt.(e) Bakelite switch and main board are to be used.

Plan Of The Block

SYMBOL USED:

1

.

Socket Outlet 15 ampere

2

.Socket Outlet 5 ampere

3

.Exhaust Fan

4

. Fluorescent Lamp

5

.Distribution switch board without switches ‘Power’

LOAD CALCULATION:

1. LH-1, LH-2, LIBRARY and COMP. LAB controls from control room.

Total load of these rooms are as follows:

Sr. no.

Name of appliance Numbers Load (watts)

1 Tube lights 29 29*40=11602 Ceiling fans 22 22*60=13204 Exhaust 2 2*100=2005 5-amp socket 5 5*100=500

TOTAL LOAD= 1160+1320+200+500=3180 WATTS

TOTAL NO. OF SUB- CKTS=3180/800=4

Hence total MCB of rating 6 amp= 4+2(future expansion)=6

PER PHASE LOAD=3180/3=1060 W

LINE CURRENT= 1060/230/0.8=5.76 AMP.

So 4 sq.mm 1 /2.24 mm dia Al, single core, pvc insulated cable will be used.

2.) LOAD ON MSB-1

Sr. no.


1 Tube lights 12 12*40=4802 Ceiling fans 9 9*60=5405 5-amp socket 5 5*100=500

TOTAL LOAD=480+540+500=1520 W

TOTAL NO. OF SUB-CKTS=1520/800=2

Hence total MCB of rating 6 amp=2+4(for future)=6

Per phase current=1520/3/0.8/230=2.75 amp.

So 4 sq.mm 1 /2.24 mm dia Al, single core, pvc insulated cable will be used

3.) LOAD ON MSB-2

Same as MSB-1.

4.) LOAD ON MSB-3

Sr. Name of appliance Numbers Load (watts)

no.1 Tube lights 16 16*40=6402 Ceiling fans 10 10*60=6005 5-amp socket 5 5*100=500

TOTAL LOAD= 640+600+500=1740 W

NO OF SUB-CKTS=1740/800=3

HENCE NO. OF MCB OF RATING 6 AMP= 3+3=6

PER PHASE CURRENT=1740/3/230/0.8=3.15 AMP.


5.) LOAD ON MSB-4

Sr. no.


1 Tube lights 16 16*40=6402 Ceiling fans 12 12*60=7203 5-amp socket 5 5*100=5004 15-amp socket 1 1000

TOTAL LOAD= 640+720+500+1000=2860 W

HENCE NO. OF MCB OF RATING 6 AMP= 3+1(for 15 amp. Socket)+2=6



6.) LOAD ON MSB-5

Sr. no.


1 Tube lights 6 6*40=2402 Ceiling fans 4 4*60=2403 5-amp socket 2 2*100=2004 15-amp socket 3 3000

TOTAL LOAD= 240+240+200+3000=3680 W

HENCE NO. OF MCB OF RATING 6 AMP= 1+3(for 15 amp. Socket)+2=6



CONDUIT CALCULATION:

LH1

SB1 to Ceiling fan = 2.5m

Ceiling to L1 =1m

L1 to L5 =4.5m

F3 to F4 =2m

SB1 to HR =2m

L2 to L6 =4.5m

TOTAL = 17m

LH2Installation plane is same for lh1 &lh2 so conduit is same i.e 17m

LIBARARYSB to HR =1.0m

HR to L1 =2m+1m =3m

L1 to L4 =12m

For Bracket

SB2 to HR =1m

HR to L7 =1+2=3m

L7 to L5 = 8m

For bracket fan(HR) =8m

Total =54m

FOR COMPUTER LABSB to L10 =1m+2m =3m

L10 t0 L9 = 5m

L5 t0 L8 = 7.5m

F1 to F2 = 4m

HR for bracket/an = 2.5m+6m=8-5m

Total = 3.5

LAB 6SB1 to F4 =2.5m+1m=3.5m

F4 to F6 = 6m

L1 to L3 =9m

F1 to F3 = 6m

F4 to F1 = 4m

STORE:-

ST-1 SB1 to L1 = 0.5m+1m=1.5mL1 to L2 = 2.m

ST-2SB1 to F1 = 2m+1.5m = 3.5m

L3 to L4 = 2m

ST-3SB1 to F3 = 3.5m

L5 to L6 =2m

Total =43.5m

Installation table is same for LAB 6,so conduit used in LAB6 = 44m

LAB-3SB1 to Ceiling fan = 2m+0.5m=2.5m

Ceiling to F1 = 3m

F1 to F3 = 6m

L1 to L2 = 9m

F4 to F6 = 6m

F2 to F5 = 4m

TOTAL =2.5+3+6+9+6+4=30.5m

LAB-4The installation plane is same for LAB-4 is same as that for LAB-3,so conduit is same

Total conduit = 30.5m

FACULTY ROOMF-1

SB1 to HR = 2m

HR1 to L2=1.5m

L2 to L1 =1.5m

Total = 5m

All the faculty rooms have same installation plane,so the conduit used in F-1,F-2,F-3 &F-4 is same

Total conduit =5*4 = 20m

LAB-2SB1 to HR =2m

HR to ceiling = 0.5m

Ceiling to L7 = 6m

L2 to F6 =7m

L1 to L5 = 7m

L7 to F3 = 6m

Total = 28.5m

LAB-1Installation is same for LAB-2 & LAB-1,so conduit used is also same

Total =28.5m

LAB-7(Pathology Lab)SB 1 to HR = 2m

HR to ceiling =0.5m

Ceiling to L1 =2m

L1 to L3 = 5m

L4 to L6 =5m

L1 to L4 = 2m

F2 to F4 = 2m

Total = 18.5m

TOTAL CONDUIT OF PHARMACY BLOCK(1ST FLOOR) :-

17+!7+54+35+44+44+30.5+30.5+20+28.5+28.5+18.5 =367.5m

10% wastage of 367.5 = 36.7

=405m

Total conduit = 13+30+20 =63m

405+63+6.3 = 474.3m

PHASE WIRE CALCULATIONS

LH-1

From Control Room to SB1 = 4m+3m+5m+24m+2m+1.5m = 39.5m

SB1 to L1 & L2 =1.5m+0.5m+3m =5m

SB1 to L5 =1.5m+0.5m+3m+2m =7m

SB1 to F1 & F2 =1.5m+0.5m+4m =6m

SB1 to L3 =1.5m+2m+0.5m+2m =6m

SB1 to F2 & F4 =1.5m+2m+0.5m+5m =9m

SB1 to L4 & L6 =1.5m+2m+0.5m+6m =10m

Total =82.5m

LH-2

From control room to SB1 = 4m+3m+2m=11m

Total =54m

LIB-1

From Control Room to SB2=4m+3m+5m+18m+1.5m =31.5m

SB2 to SB1 =1.5m +3.5m +4m =9

SB2 to B(F5) =1.5m +1m =2.5

SB1 to L7 =1.5m+0.5m+1m =3+2=5

SB1 to L6 & L5 =5m+8m =13

SB1 to B(F4) =1.5m+10m =11.5

SB2 to L1 & L3 =1.5m+3m =4.5+1=5.5m

SB2 to L3 & L4 =1.5m+3m+1m+8m =13.5

SB2 to B(F2) & B(F1) =1.5m+2m+13m =16.5

Total = 108m

COMPUTER LAB

From Control Room To SB1=4m+3m+5m+4m+10m=26m

SB1 to L10 &L9 =1.5m+0.5m+2m+6m =10m

SB1 to L3 =1.5m+0.5m+4m =6m

SB1 to L5&L6&L7&L8 =1.5m+0.5m+6m+4m =12m

SB1 to F1 & L2 =1.5m+0.5m+6m+4m =12m

SB1 to L1 & L4 =1.5m+0.5m+7m+8m =17m

Total =85m

LAB-5

MSB2 to SB1 = 5m+2.5m+1.5 m =9m

SB1 to F4 =1.5m+0.5m+2m+1m =5m

SB1 to F5 & F6 =1.5m+0.5m+2m+6m =10m

SB1 To L1 & L2 =1.5m+0.5m+2m+6m =10m

SB1 to L3 =1.5m+0.5m+4m+9m =15m

SB1 to F1 =1.5m+0.5m+6m+1m =9m

SB1 to F2 & F3 =1.5m+0.5m+6m+6m =14m

MSB to ST1 =9m

SB1(ST1) to L1 & L2=1.5m+1.5m+1m=4+2 =6m

SB1(ST1) to F1 =1.5m+1.5m+1m+1m =5m

MSB2 to ST2 =9m+6m+2m =17m

SB1(ST1) to L3 & L4 =6m

SB1(ST1) to F2 =5m

MSB2 to SB1(ST3) =9m+10m=19+2 =21m

SB1 to F3 =1.5m+0.5m+2m =4m

SB1 to L5 & L6 =1.5m+0.5m+2m+2m =6m

Total =149m

LAB-6

Same Installation Plan, so phase wire is also same =149m

LAB-3

MSB1 to SB1 = 3m+2m+1.5m = 6.5m

SB1 to F1 =1.5m+0.5m+2m+1.5m =5.5m

SB1 to F2 & F3 =5.5m+6m =11.5m

SB1 to L1 =1.5m+0.5m+4m+1m =7m

SB1 to L2 & L3 =7+9 =16m

SB1 to F4 =7m+2m =9m

SB1 to F5 to F6 =9m+6m =15m

Total =70.5m

LAB-4

Same installation plane, So phase wire is also same in LAB-3=70.5m

LAB-2

MSB1 to SB1 =11m+1m+1.5m =13.5m

SB1 to L7 =1.5m+0.5m+7m =9m

SB1 to F2 & F4 =1.5m+0.5m+4m =6m

SB1 to L2 & L4 =1.5m+0.5m+2m+4m =8m

SB1 to L6 = 0.5m+1.5m+2m+1m+8m=13m

SB1 to L1 & L2 & L5=2m+4m+8m =14m

SB1 to F1 & F2 =2m+4m+6m =12m

Total =75.5m

LAB-1

Same installation plane, so phase wire is same as LAB-2 = 75.5m

FACULTY ROOM

MSB1 to SB1 =8+1 =9

SB1 to F1 =1.5+0.5+1+1 =4

SB1 to L1 & L2=1.5+0.5+1+2 =5

=18

18*4 =72

Total Phase wire =72

PATHOLOGY LAB:

MSB1 to SB2 =13m+13m+1.5m=26m+1.5m=27.5m

SB1 to SB2 =2m+1.5m =3.5m

SB1 to SB3 =3.5m

SB1 to L1 = 1.5m+0.5m+2m =4m

SB1 to F1 & L2=4m+3.5m =7.5m

SB1 to L2 & L3=4m+5m=9m

SB1 to L5 & L6=1.5m+0.5m+4m+2m+2m =10m

SB1 to F4 =1.5m+0.5m+4m+2m+1m =9m

SB1 to L4 =1.5m+2m+2m =5.5m

SB1 to F3 =1.5m+2m+3m =6.5m

TOTAL =86m

TOTAL PHASE WIRE

82.5m+54m+108m+85m+149m+149m+70.5m+70.5m+75.5m+75.5m+72m+86m=1077.5m

10 % waste = 107.7M

HENCE, TOTAL PHASE WIRE =1185.2m or 1190m

NEUTRAL CALCULATION

LH-1SB1 to L1 = 2.5m+1=3.5m

L1 to L5 =4.5m

F3 to F4 =2m

F4 to L6 =1m

F4 to L6 =1m

From lib = 6m 20m

LH-214m+6m = 20m

LIB-1SB to LH2 = 16m

SB to L1 =1+2 =3m

L1 to L4 =12m

SB2 to L7 = 3m

L7 to L5 = 8m

SB to BF1 = 1+1=2m

B(F1) to B(F3) =8m=52m

COMPUTER LAB:-SB(lib) to B(F7) =2m

B(F7) to L4 =2m

L4 to L1 = 7m

F1 to F2 = 4m

L5 to L8 = 7.5m

L10 to L9 = 5m

L10 to SB1 =3m

Total =37.5m

LAB-6MSB2 to F1 =2+2-5=4.5m

F1 to F3 = 6m

L1 to L3 =9m

F4 to F6 = 6m

F4 to SB1 =1m+2m+2.5m

TOTAL =31m

ST-1From SB1 to SB2(ST1) = 0.5m

SB1 to L2 =3m+2.5+5=6m

6*3 =18m

31+18=50m

LAB-5N.W=50m

LAB-3MSB2 to F1 =2.0m+2m =4m

F1 to F3 = 6m

F1 to SB1 = 2m+2.5m+1m=5.5m

L1 to L3 = 8m

F1 to F6 =6m

F1 to L1 =2m

L1 to L4 =2m

TOTAL =33.5m

LAB-4Installation is same as LAB 4 33.5m

FACULTY ROOM(F1)NW From SB1 to F1 =8m

SB1 to L2 =1.5+1+0.5m+2m =5m

F25m

F35m

F45m

TOTAL FACULTY ROOM=20m

LAB-2L2(Faculty room f1) to L2(LAB-2) =3m

L2 to L1 =2m

L1 to L5 =7m

L2 to F6 =7m

L4 to L7 =1m

L7 to SB1=7+2.5=9.5m

TOTAL=29.5m or 30m

LAB-1Same as LAB 2 TOTAL =30m

LAB-7From L7 (LAB-2) to SB1 =8m+2.5m=10m

SB1 to L3 =2m+0.5m+7m=9.5m

L4 to L6 = 5m

L1 to L6=5m

L1 to L4 =2m

Total=27m

CORRIDORConrol room+L3 =10m+3m=13m

L3 to L5 =8 m

L3 to L7 = 14m

MSB1 to L10 = 18m+1m=19m

L10 to L11 =4.5mTOTAL(NW)=20m+20+52m+37.5m+31+50+50+33.5+28+30+30+27+58.5 =467.5m

10% waste =467.5/10 =46.7

HENCE TOTAL NEUTRAL WIRE REQD. =467.5+46.7 =514m

MATERIAL TABLE

Sr. No.

Specification Quantity Rate

(Rs)

Amount

(Rs)

1. 1. 4 sq.mm 1 /2.24 mm dia Al, single core, pvc insulated cable

175M 200 35000

2 MCB distribution board

6A

With din rail and steel mounting board and other attachments

36 90/pc 3240/-

3. Iron clad main board 60x60cm with 4 rag bolts and nuts each of diameter 10x150mmlong for fixing MB with wall

6 200/pc 1200/-

4. Conduit pipe black enamel and light gauge (25mm dia)

475 8/pm 3800/-

5. Conduit pipe accessories:

1. Coduit socket to connect two pieces of conduit

2. Bends 3. Junction box(2

way)4. Junction box(3

way)

125

50

50

30

3

3

5

5

375/-

150/-

250/-

150/-

6. PVC insulated copper conductors single core 250Vgrade wire of size

1190+514= 1704m 6/m 10,224/-

1.5 mm2 or 1/1.40 dia

7 . Earth wire 14SWG, G.I. 50m 5/m 250/-

8. Machine screws 3mm dia 25mm long for fixing ceiling roses and lamps

450 2/pc 900/-

9. Machine screws 3mm dia 15 mm long for fixing Bakelite junction box cover

65 1.50/pc 97.5/-

10. Earthing set complete with pipe,GI pipe, earth wire, CI frames , CI covers, thimbles, charcoal

1 2500/set 2500/-

11. Teak wood frame and shutter door

1 550/set 550/-

12. Fan 57 1200/- 68,400/-

13. Exhaust fan 2 1000 2000/-

14. Tubelight Set 79 150 11850/-

15. 5 amp Socket 22 15 330/-

16. 15 AMP socket 4 45 180/-

17. Flush Switch 180 14 2520/-

18. Ceiling rose,Bakelite for tubes and fans

135 10 1350/-

GRAND TOTAL 1,47,316.5/-

electrical estimating and costing

Documents