60664

60664 is a designation used in international electrical engineering to refer to the IEC 60664 series of standards dealing with insulation coordination for equipment within low-voltage systems. The standards define the principles and requirements for selecting insulation levels so that electrical equipment can withstand operating voltages, transients, and environmental stresses without failure, while maintaining safety and reliability.

The main part, IEC 60664-1, provides general definitions and principles for insulation coordination, including how insulation levels are determined, how creepage and clearance distances are assessed, and how insulation systems are chosen for different equipment configurations. The series is widely adopted in product design, testing, and certification processes to ensure compatibility of insulation across components and adherence to safety regulations.

In practice, 60664 guidance informs engineers when selecting materials, barriers, coatings, and geometries to prevent electrical breakdown. It is used in conjunction with related electrical safety standards and often referenced by manufacturers during compliance documentation.

While 60664 is most commonly encountered in technical and regulatory contexts, it is part of a broader IEC framework governing electrical insulation and safety in low-voltage equipment.