Color Standard for Stop Lights in Distribution Boxes

IEC 60204-1 recommends black, white, or gray for STOP/OFF indicators, with red reserved for emergency stop, while START/ON indicators are typically white, gray, or black, with green optionally allowed.Standard Color CodingSTOP / OFF Indicators:Preferred colors: Black, White, GrayRed is permitted only for emergency stop functionsGreen should not be used for STOP/OFF actuatorsWhen distinguishing between START/ON and STOP/OFF using only white and black, black is used for STOP/OFF and white for START/ON START / ON Indicators:Preferred colors: White, Gray, BlackGreen is optionally allowedRed should not be used for normal START/ON functionsThese actuators close switching devices and start equipment Emergency Stop:Red is the standard color, often combined with a yellow background to enhance visibilityOnly used for emergency stop functions, not for normal STOP/OFF Reset Actuators:Colors: Blue, White, Gray, BlackIf a reset actuator also functions as STOP/OFF, it should follow the STOP/OFF color rules Abnormal Conditions / Alerts:Yellow is used to indicate abnormal conditions, such as automatic cycle interruptionsRed, yellow, blue, and green can be used to attract operator attention for warnings or alerts Confirm Command / Status Indicators:Blue and White are typically used to confirm commands or indicate successful operations Additional GuidelinesWhen the same color is used for multiple functions, engraving, symbols, or labels should be added to avoid confusionThese color standards are part of IEC 60204-1, which ensures operator safety, clear identification, and consistency across industrial control panels Following these standards reduces the risk of misoperation and enhances maintenance efficiency By adhering to these color conventions, distribution boxes and control panels maintain safety, clarity, and compliance with international electrical standards.