Approximate Weight of Copper Strips
(Electrolytic grade wt. in kgs. / mt.)
Width mm
1/16
1/8
3/16
1/4
3/8
1/2
1/2
.184
.367
.574
.746
1.089
1.434
3/4
.275
.550
.860
1.119
1.635
2.151
1"
.362
.734
1.417
1.491
2.180
2.868
2"
.
1.470
2.294
2.982
4.359
5.736
3"
..
.
3.442
4.475
6.539
8.604
4"
..
.
4.588
5.965
8.719
11.472
5"
..
.
5.736
7.475
10.898
14.340
6"
..
.
6.883
8.948
13.078
17.208
Voltage Rating for Lightning Arresters
(3-Phase Systems)
Voltage Rating for Power Equipment
Voltage KV
Rating kV
Voltage class
Generator transformer load rated voltage
Utilization equipment
Voltage system ungrounded or resistance grounded
System neutral effectively ground
0.120
0.65
175
240
240
220
0.240 to 0.600
0.65
0.65
480
480
440
2.4
3
3
600
600
550
4.8
6
6
2400
2400
2300
6.9
9
6
12
15
12
4160
4160
4000
23
25
20
46
50
40
6900
6900
5600
69
73
60
138
145
121
13800
13800
13,200
Current Capacity andSize of Cables for A.C. 3 Phase Motors
HP of motor
Current Amps
Size of PVC aluminium wire
HP of motor
Current Amps
-400 volts size of PVC aluminium wire
0.25
.07
.
15
22.0
3 x 10
.50
1.2
.
20
29.0
3 x 10
.75
1.7
.
30
42.0
3 x 16
1
2.0
.
40
56.0
3 x 25
2
3.5
3 x 25
50
71.0
3 x 25
3
5.0
.
75
105.0
3 x 35
4
6.5
.
100
140.0
3 x 50
5
8.0
.
125
175.0
3 x 95
7.5
12.0
3 x 4
150
210.0
3 x 120
10
15.0
3 x 6
.
.
.
12.5
19.0
3 x 6
.
.
.
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