They must be integrated into the panel by being:
- properly mounted and connected (fixing, drilling, sealing),
- clearly identified (labels, color codes, pictograms).
Unless otherwise specified in the applicable product standard, the colors of indicator lights and pushbuttons shall comply with IEC 60073.
Below is an extract of the main color codes covered by the IEC 60073 standard:
| colours | significations | significations | significations |
|---|---|---|---|
| Red | Danger | Urgence | Failure |
| Yellow | Warning/Caution | Anomaly | Anomaly |
| Green | Security | Standard working | Standard working |
| Blue | Mandatory information | Mandatory information | Mandatory information |
| White / Grey / Black | No specific meaning assigned | No specific meaning assigned | No specific meaning assigned |
The color displayed by indicator lights must be selected according to the type of information to be communicated. Meanings shall be assigned to colors based on the control criterion, chosen in order of priority from the following:
- safety of persons or the environment,
- process condition,
- status of equipment.
Definition
The IEC 61439-1 standard is an international standard that defines the general requirements for low-voltage switchgear assemblies, in other words, electrical panels.