Creepage Distance

Creepage Distance is a key parameter in safety certification for electrical products, referring to the shortest path distance along the surface of insulating material between two conductive parts. Unlike Clearance, which is the shortest straight-line distance through air, Creepage Distance mainly prevents tracking and short circuits caused by surface contamination, moisture, or aging, ensuring insulation performance during long-term use. In foreign trade, this term is commonly found in safety test reports (e.g., IEC/EN 60950, 62368, UL standards) and customer technical specifications for electronic appliances, luminaires, power adapters, etc. Exporting to the EU requires CE-LVD compliance, the US requires UL certification, and China requires CCC certification. Note: Different standards have different limit requirements for working voltage, pollution degree, and material group (CTI); sufficient margin should be allowed in design. If Creepage Distance does not meet requirements, it may lead to certification failure, returns, or recalls. It is the same concept as '爬电距离' with different translations; for foreign trade documents, it is recommended to use 'Creepage Distance' consistently and specify the standard.