For intermittent loads (e.g., welding equipment, cranes, compressors), the standard allows a higher current if the OFF time is sufficient for cooling. However, for continuous loads ( > 1 hour), f4 = 1.0.
The standard defines the maximum permissible current that a conductor can carry without exceeding its safe operating temperature at any point. Stecker Express Core Content and Tables din vde 0298 part 4
: Adjustments for environments hotter or colder than For intermittent loads (e
Even experienced electricians fall into these traps: Stecker Express Core Content and Tables : Adjustments
DIN VDE 0298 Part 4 is a copyrighted document available from (www.vde-verlag.de) or Beuth Verlag . The current version as of 2025 is VDE 0298-4:2013-06 (with amendments). Always use the latest edition, as correction factors are occasionally updated based on new research.
DIN VDE 0298-4 standard, titled "Application of cables and cords in power installations - Part 4," provides critical guidelines for the recommended current-carrying capacity