Current Rating-300/500 V Flexible cords
Current rating and voltage drop of Cable given below are based on the IEEE wiring regulations 17th edition. For detailed information, reference should be made to Appendix 4 of above IEEE edition.
Currnt Carrying Capacity, Voltage Drop and Mass Supportable
| Nominal Area of Conductor |
Current-carrying Capacity |
Voltage Drop |
Maximum Mass Supported by flexible cord |
| Single-phase a.c |
Three-phase a.c |
Single-phase a.c |
Three-phase a.c |
| Sq.mm |
A |
A |
mV/A/m |
mV/A/m |
kg |
| 0.5 |
3 |
3 |
100 |
86 |
2 |
| 0.75 |
6 |
6 |
67 |
58 |
3 |
| 1 |
10 |
10 |
50 |
43 |
5 |
| 1.5 |
16 |
16 |
35 |
29 |
5 |
| 2.5 |
25 |
20 |
21 |
17 |
5 |
| 4 |
32 |
25 |
13 |
11 |
5 |
Installation conditions for above Rating:
Maximum Conductor Temp. for PVC Type 5 Insulation 85°C
Maximum Conductor Temp. for PVC TI1/Type A Insulation 70°C
Ambient Air Temperature 30°C
Rating factor for variation in Ambient temperature
| Ambient temperature (°C) |
25 |
30 |
35 |
40 |
45 |
50 |
55 |
60 |
65 |
| PVC Insulated Cable (85°C) |
1 |
1 |
1 |
1 |
1 |
0.94 |
0.87 |
0.79 |
0.71 |
| PVC Insulated Cable(70°C) |
1 |
1 |
0.94 |
0.87 |
0.79 |
0.71 |
0.61 |
0.5 |
0.35 |