Wiring color identification in control cabinets under IEC 60445

Context

This article addresses a common question regarding wire color usage and labeling in Robotiq control cabinets, particularly in installations governed by IEC 60445 standards in Europe. Customers occasionally inquire about the use of wire color versus other identification methods.

Information

IEC 60445:2021 specifies the basic rules for identifying electrical conductors. When colors are used alone as identifiers, specific conventions must be followed. For example, light blue is the standard color for neutral conductors, and green-yellow is reserved for protective earth.

However, clause 6.2.2 of IEC 60445 clearly allows for alternative identification methods. If conductors are clearly marked by other means—such as consistent terminal numbering, wire markers, or functional labels—color coding is not mandatory.

Robotiq’s compliance approach

In our Palletizing Solution and other systems, Robotiq ensures full IEC 60445 compliance by using:

• Systematic wire labeling for all conductors

• Clear terminal block identification

• Consistent and unambiguous marking practices

This approach ensures that each wire is traceable and identifiable, even if standard colors like light blue or green-yellow are not used. By prioritizing reliable labeling, we eliminate the risk of misidentification and remain fully aligned with IEC requirements.

Documentation 

Electrical schematics and identification can be found on our website : 

https://robotiq.com/support

Conclusion

While wire color remains a useful tool for quick identification, Robotiq’s consistent use of labeling across all conductors ensures full compliance with IEC 60445. This method is both safe and regulatory-aligned, supporting robust installation practices.

Need help? Contact us at support@robotiq.com

Updated: January 2026