DE-RATING FACTORS
| Ambient Temperature |
25°C |
30°C |
35°C |
40°C |
45°C |
| De-Rating Factor |
1 |
0.96 |
0.91 |
0.87 |
0.82 |
The above table is in accordance with Table A.7 of BS 638 Part 4
ELECTRICAL CHARACTERISTICS Duty Cycle and Current Carrying Capacity The current carrying capacity of a welding cable depends on the length of the duty cycle. The duty cycle is the length of time during which a loaded current passes through the cable over an operation period of 5 minutes, expressed as a percentage of that period. For example, if the current is flowing for the whole 5 minutes the duty cycle is 100%, and if the current is flowing for 1 minute the duty cycle is 20%. As conductor temperature varies according to the time in use as well as current, ratings shown are given as a guide. The permissible loading of the cable for duty cycles other than those shown in the table can be calculated using the following formula: I = I100 x √100/F Where: I: is the maximum permissible loading current for the required duty cycle. I 100 : is the maximum permissible loading current for a duty cycle of 100%. F : is the required duty cycle calculated as a percentage of the 5 minute operation period. Typical guidance values for different welding processes are as follows: Fully automatic welding 100% Semi-automatic welding 65 - 85% Manual welding 30 - 60% Very infrequent or occasional welding 20%
CURRENT CARRYING CAPACITY
| Nomincal Cross Sectional Area mm2 |
Current Rating for Single Cycle Operation Over A Maximim Period Of 5 Minutes Amps 100% |
Current Rating for Single Cycle Operation Over A Maximim Period Of 5 Minutes Amps85% |
Current Rating for Single Cycle Operation Over A Maximim Period Of 5 Minutes Amps 60% |
Current Rating for Single Cycle Operation Over A Maximim Period Of 5 Minutes Amps 35% |
| 16 |
135 |
145 |
175 |
230 |
| 25 |
180 |
195 |
230 |
300 |
| 35 |
225 |
245 |
290 |
375 |
| 50 |
285 |
305 |
365 |
480 |
| 70 |
355 |
385 |
460 |
600 |
| 95 |
430 |
470 |
560 |
730 |
| 120 |
500 |
540 |
650 |
850 |
| 150 |
580 |
630 |
750 |
980 |
| 185 |
665 |
720 |
860 |
1120 |
| 240 |
780 |
850 |
975 |
1250 |
Class 5 Flexible Copper Conductors for Single Core and Multi-Core Cables
| Nominal Cross Sectional Area mm2 |
Maximum Diameter of Wires in Conductors mm |
Maximum Resistance of Conductor at 20ºC ohms/km
Plain Wires
|
| 120 |
0.51 |
0.161 |
| 150 |
0.51 |
0.129 |
| 185 |
0.51 |
0.106 |
| 240 |
0.51 |
0.0817 |
CONDUCTORS
Class 6 Flexible Copper Conductors for Single Core and Multi-Core Cables
| Nominal Cross Sectional Area mm2 |
Maximum Diameter Of Wires In Conductor mm |
Maximum Resistance Of Conductor at 20ºC ohms/km
Plain Wires
|
| 16 |
0.21 |
1.21 |
| 25 |
0.21 |
0.78 |
| 35 |
0.21 |
0.554 |
| 50 |
0.21 |
0.386 |
| 70 |
0.21 |
0.272 |
| 95 |
0.21 |
0.206 |
DIMENSIONS
Type 0361TQ - Tinned Copper Conductors
| BATT Part No |
Conductor Class |
Nominal cross sectional area of conductor |
Total Radial thickness of covering |
Approx overall diameter |
Weight |
| 19003 |
6 |
16 |
2 |
10.9 |
212 |
| 19006 |
6 |
25 |
2 |
12.5 |
300 |
| 19012 |
6 |
35 |
2 |
14 |
403 |
| 19034 |
6 |
50 |
2.2 |
16 |
560 |
| 19036 |
6 |
70 |
2.4 |
18.6 |
776 |
| 19042 |
6 |
95 |
2.6 |
21.2 |
1035 |
| 19029 |
5 |
120 |
2.8 |
23.1 |
1300 |
| 19031 |
5 |
150 |
3 |
24 |
1900 |
| 19032 |
5 |
185 |
3.2 |
27.9 |
1944 |
| 19060 |
5 |
240 |
3.4 |
31.5 |
1064 |
