ISO 20653 and IEC 60529 are two different standards that specify the degree of protection provided by enclosures for electrical equipment against the intrusion of foreign objects (including dust and liquids) and accidental contact with live parts.

The main difference between these two standards is that ISO 20653 is more recent and specific to vehicles, while IEC 60529 is a more general standard that applies to all types of electrical equipment.

ISO 20653 specifies the degrees of protection (IP codes) required for electrical equipment used in road vehicles, such as passenger cars, trucks, and buses. The standard specifies a range of IP codes that indicate the degree of protection provided by the enclosure against the ingress of water, dust, and other foreign objects.

IEC 60529, on the other hand, provides a more general standard for enclosures for all types of electrical equipment, including those used in industrial, commercial, and residential settings. The standard also specifies a range of IP codes that indicate the degree of protection provided by the enclosure against the ingress of water, dust, and other foreign objects, but it does not specifically address the needs of vehicles.

Overall, while both standards address the same general topic of enclosure protection, ISO 20653 is more specific to the needs of vehicles, while IEC 60529 is a more general standard that applies to a broader range of electrical equipment.