Clearance and creepage distance requirements for systems with mains voltages greater than 300 V are covered in Annex K. Internal clearance and creepage requirements remain, and greater distances are specified due to the larger voltages. Table 1. Internal Clearance and Creepage Distance Requirements for Thin-Film Insulation
Similar to clearance, creepage measures the distance between conductors on for high voltage PCB. However, instead of measuring distance in air, it measures the shortest distance along the surface of the insulation material. Board material and environment also affect creepage requirements.
In an isolated power supply (or any isolated system), this is a standard technique to increase creepage distance. Reduce manual routing time for even the most complex projects. After operating voltage, the most significant factor in the clearance and creepage requirements for a printed circuit board comes from the material properties of your PCB.
Creepage and Clearance Creepage distance is calculated, given a battery working voltage, a material group, and a pollution degree. The working voltage refers to the maximum system voltage of the battery, and the material group measures the Component Tracking Index, which appears in the material specification of insulators.
Adding either a slot between tracks or a vertical barrier of insulation can significantly increase the creepage distance without changing the trace layout on the board. Creepage vs. clearance in a PCB. The red line shows the PCB creepage distance between two traces. If this looks drawing a bit odd, consider the power supply PCB layout shown below.
Both of these terms are used to define distances between conductors in a PCB layout and are specified in safety standards. Creepage and clearance are defined as the spacing between two neighboring conductors, although they are defined in two different ways. What is Clearance on a PCB?