Mahesh Engineering Services - Indian House Wiring Specifications

August 29, 2019

Indian House Wiring Specifications

Indian House Wiring Specifications


Modern flexible wiring


Nom. Cross section area of conductor in sq.mm Current rating in amps.
0.75
9
1 14
1.5 18
2.5 24
4 32
6 42
10 55

Traditional Wiring

Number of Strands Current Rating in amps
1/18 5
3/22 10
3/20 15
7/22 20
7/20 28
7/18 36
7/16 53

Electrical Properties

Cross section area, sq.mm. Approx. AWG Overall. Dia., mm Max.. Insul. Thickness,mm, Nom. Cond. Config. No. of wires/ max.dia.. Cond. Resist., W/km At 20 C Max Max. current rating, (A) Approx. voltage drop per amp per meter, mV
0.5 22 2.6 0.6 16/0.20 36.0 6 46.0
0.75 20 2.8 0.6 24/0.20 24.5 9 31.0
1.0 18 3.0 0.6 32/0.20 19.5 14 22.0
1.5 16 3.4 0.7 30/0.25 13.3 18 15.0
2.5 14 4.2 0.8 50/0.25 7.98 24 9.1
4.0 12 4.8 0.8 56/0.30 4.95 32 5.7
6.0 10 5.6 0.8 84/0.30 3.30 42 3.8
10.0 8 7.0 1.0 140/0.30 1.91 55 2.2
16.0 6 8.2 1.0 126/0.40 or 226/0.30 1.21 75 1.4
25.0 4 10.0 1.2 196/0.40 0.780 100 0.89
35.0 2 11.5 1.2 276/0.40 0.554 125 0.64
50.0 1 13.0 1.4 396/0.40 0.386 165 0.45
70.0 2/0 15.0 1.4 360/0.50 0.272 240 0.32
95.0 3/0 17.5 1.6 475/0.50 0.206 300 0.24
120 4/0 19.0 1.6 608/0.50 0.161 325 0.19
150 - 21.5 1.8 750/0.5 0.129 352 0.15
185 - 24.0 2.0 926/0.5 0.106 400 0.12
240 - 27.0 2.2 1200/0.5 0.0801 475 0.10
300   29.5 2.4 1500/0.5 0.0641 500 0.08

Short Circuit Current Rating

Area of conductor Short circuit current for 1 sec in amps
0.5 48
0.75 72
1 115
1.5 170
2.5 280
4 460
6 690
10 1150


Single Core Unsheathed Annealed copper conductor as per BSS-2004/1961
voltage grade 1100 Volts.
No.of strand & Size
of wire in inch
Size in
SWG
Nominal area of
Conductor in Sq.mm
Thickness of Insulation
in mm
Nominal overall Dia
in mm
Current rating
Amps
1/0.044*
1/18
1.0
1.05
3.30
5
1/0.046*
1/17
1.1
1.05
3.70
7
3/0.029*
3/22
1.3
1.05
3.50
10
3/0.036
3/20
2.0
1.20
4.85
16
3/0.036*
3/20
2.0
1.05
3.90
15
7/0.029*
7/22
3.0
1.15
4.80
20
7/0.036
7/20
4.5
1.30
6.10
29
7/0.036*
7/20
4.5
1.15
5.20
28
7/0.044
7/18
7.0
1.30
6.50
36
7/0.064
7/16
15.0
1.30
8.70
53
19/0.044
19/18
19.0
1.30
10.40
62
19/0.064
19/16
40.0
1.30
12.70
97
19/0.083
19/14
65.0
1.40
16.50
140
37/0.064
37/16
75.0
1.55
17.30
158
37/0.083
37/14
130.0
1.70
22.50
218


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