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Welding Cable Amperage Chart |
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AMPS |
100' | 150' | 200' | 250' | 300' | 350' | 400' |
| 100 | 4 | 4 | 2 | 2 | 1 | 1/0 | 1/0 |
| 150 | 4 | 2 | 1 | 1/0 | 2/0 | 3/0 | 3/0 |
| 200 | 2 | 1 | 1/0 | 2/0 | 3/0 | 4/0 | 4/0 |
| 250 | 1 | 1/0 | 2/0 | 3/0 | 4/0 | ||
| 300 | 1/0 | 2/0 | 3/0 | 4/0 | |||
| 350 | 1/0 | 3/0 | 4/0 | ||||
| 400 | 2/0 | 3/0 | |||||
| 450 | 2/0 | 4/0 | |||||
| 500 | 3/0 | 4/0 | |||||
| 550 | 3/0 | 4/0 | |||||
| 600 | 4/0 | Required Cable Sizes Show in Gauge Numbers | |||||
| *The total circuit length includes both welding and grounds leads (based on 4-volt drop) 60% duty cycle. |
| Description |
| These values for current-carrying capacity are based on a copper temperature of 60°C (140°F), an ambient temperature of 40°C (104°F) and yield load factors from approximately 32% for the 2 AWG cable to approximately 23% for the 3/0 AWG cable. In actual service, the load factor may be much higher than indicated without overheating the cable as the ambient temperature will generally be substantially lower than -40°C. |
| Suggested
Ampacities For 600 Volt In-Line Applications |
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Per standards:
ICEA S-19-18 NEMA WC-3 Part 8, Appendix J. Ampacities for portable cable, continuous duty (Ambient Temperature of 40°C) |