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IEC 60364-4-43

Low-voltage electrical installations — Protection for safety — Protection against overcurrent

Coordination between conductors and overcurrent devices: the Ib ≤ In ≤ Iz overload condition, the conventional tripping current check, and short-circuit protection of conductors (k²S² ≥ I²t).

What it covers

  • Overload coordination Ib ≤ In ≤ Iz and I2 ≤ 1.45 Iz
  • Short-circuit protection of conductors
  • Position of protective devices

Used in ElecCalcPro

Related standards

IEC 60898-1IEC 60947-2IEC 60364-5-54

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