IEC60598‑1 Creepage Distance Gauges for Insulation Creepage Path Testing Complied Standards IEC 62196-1 Ed.4CDV 2020 clause 28. Product information: These test gauges conform to IEC60598-1, IEC60335-1 Clause 29 and IEC60884-1 etc. They are used to determine the shortest path between two conductive parts, or between a conductive part and the bounding surface of the equipment, measured along the surface of the insulation, with specifications made according to the requirements.