Published by the International Electrotechnical Commission (IEC), this document specifies the maximum permissible temperatures that insulated cables can withstand under short-circuit conditions. Unlike continuous operation, where temperature rise is gradual, a short-circuit event can raise a conductor's temperature dramatically within milliseconds.
Preventing fire hazards caused by insulation breakdown. Iec 60724 Pdf
: Mechanical restraint and installation conditions (like snaking for cables in air to absorb expansion) are vital to prevent radial pressure damage to thermoplastic components during a fault. Relationship with Other Standards : IEC 60724 is often used alongside where temperature rise is gradual
If you are an engineer or installer, you don't just "guess" these values. You typically use IEC 60724 alongside , which provides the actual formulas to calculate permissible short-circuit currents based on these temperature thresholds. Iec 60724 Pdf