IEC 60529 is an international standard published by the International Electrotechnical Commission (IEC) that defines a system for classifying the degree of protection provided by enclosures for electrical equipment. The standard is commonly referred to as the "IP Code," or "Ingress Protection Code," and is used to indicate the level of protection provided by an enclosure against various external factors, such as dust, dirt, water, and fingers.

The standard consists of the letters "IP" followed by two numbers. The first number indicates the level of protection against solid objects, such as dust and fingers, while the second number indicates the level of protection against liquids, such as water. Each number is assigned a range of values, with higher values indicating a higher level of protection.

For example, an IP65 rating means that the enclosure is dust tight and protected against water jets, while an IP20 rating means that the enclosure allows entry of objects larger than fingertips, but is not protected against water.

IEC 60529 is an important standard for manufacturers and users of electrical equipment, as it helps to ensure that the equipment is suitable for the intended environment and can be used safely.