1. Normal operation: green.
2, downtime maintenance: blue.
3, equipment out of service: blue.
4, equipment failure: yellow.
5. Equipment sealing: red.
Rationale:
The International Organization for Standardization (ISO) and many countries have strict regulations on the use of safety colors. China has developed a national standard for safety colors. Provides for the use of red, yellow, blue, green four colors as the national common safety color. In general, red mostly refers to the prohibition; yellow mostly indicates attention, warning; blue indicates instructions, must comply with; green indicates the passage, safety and provide information for reference, so the equipment status signage is also categorized accordingly.
Expanded informationNational standard for the safety of the provisions of the color:
National standard GB2893-82 "safety color" on the meaning and use of the safety color, lighting requirements, the color range, as well as the inspection and maintenance of specific provisions.
National standard GB6527.2-86 "safety color code of practice" for further explanation, and gives specific examples of use.
According to the Safety Colors (GB2893-2001), the state provides for four safety colors to convey safety information: red for prohibition and danger; yellow for warning and attention; blue for instruction and compliance; and green for access and safety.
According to the Safety Colors (GB2893-2008), red: conveys the information of prohibition, stop, danger, or hints of fire precautions and facilities; blue: conveys the directive information that must be complied with; yellow: conveys the information of attention and warning; and green: conveys the suggestive information of safety.
Baidu Encyclopedia - Safety Colors