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 20C 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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