What is the enclosure protection grade IP code for electrical equipment? Detailed explanation of the basic concept of safety improvement

Explanation of IT Terms

What is the IP Code for Enclosure Protection Grade in Electrical Equipment?

The IP code, or Ingress Protection code, is a standard used to define the level of protection provided by enclosures for electrical equipment. It specifies the degree of protection against the intrusion of solid objects, such as dust or debris, and liquids, such as water. The IP code is crucial in determining the suitability of electrical equipment for various environments and ensuring the safety of both the equipment and the users.

The IP code consists of two digits. The first digit indicates the level of protection against solid objects, while the second digit represents the level of protection against liquids. Let’s take a closer look at each digit.

First Digit: Protection Against Solid Objects

The first digit ranges from 0 to 6 and provides information about the equipment’s protection against solids. Here’s a breakdown of each level:

  • 0 – No protection against solids. The equipment is not protected against any object intrusion.
  • 1 – Protection against solids larger than 50mm. This ensures protection against large parts of the body, such as hands.
  • 2 – Protection against solids larger than 12.5mm. It safeguards the equipment against tools or fingers.
  • 3 – Protection against solids larger than 2.5mm. This level prevents most wires, screws, or similar small objects from entering.
  • 4 – Protection against solids larger than 1mm. The equipment remains safe from thin wires, ants, or other tiny elements.
  • 5 – Dust protected. It ensures the prevention of dust accumulation that could interfere with the equipment’s functionality.
  • 6 – Dust-tight. The highest level of protection against dust and complete sealing of the equipment.

Second Digit: Protection Against Liquids

The second digit ranges from 0 to 9, representing the equipment’s protection against liquids. Let’s explore each level of liquid protection:

  • 0 – No protection against liquids. The equipment is not shielded from any liquid intrusion.
  • 1 – Protection against vertically falling drops of water. It safeguards the equipment from vertically falling water droplets that have no harmful effect.
  • 2 – Protection against falling drops when tilted up to 15 degrees. It protects against water drops falling at a 15-degree tilted angle, having no adverse effects.
  • 3 – Protection against spraying water. The equipment remains safe from water spray at any angle up to 60 degrees.
  • 4 – Protection against splashing water. It ensures the equipment’s safety when splashed with water from any direction.
  • 5 – Protection against water jets. The equipment remains unaffected by water projected from any direction by a nozzle.
  • 6 – Protection against powerful water jets. It safeguards against the entry of water under high-pressure conditions.
  • 7 – Protection against temporary immersion in water. The equipment can withstand the immersion in water up to 1 meter for 30 minutes.
  • 8 – Protection against continuous immersion in water. It ensures the equipment remains functional even when continuously submerged in water under conditions specified by the manufacturer.
  • 9 – Protection against high-pressure and steam cleaning. The highest level of liquid protection, providing resistance against high-pressure, high-temperature water jets used in cleaning operations.


Understanding the IP code is crucial when selecting electrical equipment suitable for specific environments and ensuring safety. The digits in the IP code provide information about the level of protection against solids and liquids. With this knowledge, users can choose the appropriate equipment that meets their specific needs, minimizing potential risks and ensuring the longevity of the equipment. Always refer to authoritative sources and consult experts in the field before making any purchasing decisions.

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