1, red: used to mark the prohibition, stop and fire, such as signal lights, signal flags, emergency stop button on the machine, etc. are in red to indicate that "prohibited" information.
2, yellow: used to mark the danger. Such as "beware of electric shock", "pay attention to safety" and so on.
3, green: used to mark the safe and sound. Such as "work here", "grounded" and so on.
4, blue: used to mark the mandatory, such as "must wear a helmet" and so on.
5, black: used to mark the image, text to comply with the geometric shapes and warning signs. In accordance with the regulations, in order to facilitate identification, to prevent misuse, to ensure the safety of operation and maintenance personnel, the use of different colors to distinguish the characteristics of the equipment.
Expanded
China's provisions of the warning signs *** have 30, which are related to electricity such as:
Attention to safety, beware of electric shock, beware of explosion, beware of fire, beware of corrosion, beware of poisoning, beware of mechanical injuries, beware of injury, beware of injury to the hand, beware of hanging things, beware of feet, beware of falling things, beware of falling Beware of vehicles, beware of arc light, beware of roofing, beware of gas, beware of landslides, beware of potholes, beware of ionizing radiation, beware of fissile material, beware of lasers, beware of microwaves, beware of slips and falls, and so on.
Baidu Encyclopedia- Warning Signs