This indicates a prohibited operation. The prohibited operation is indicated symbolically in or near the barred circle. | |
This indicates a compulsory safety precaution. The required operation is indicated symbolically in or near the circle. | |
This indicates a danger, warning, or caution. The contents are indicated symbolically in or near the triangle. | |
This indicates a note. The contents are described in the box. | |
This indicates a push button Out position (generally Off condition). This indicates a push button In position (generally On condition). | |
This indicates an Off condition. This indicates an On condition. | |
This indicates Alternating Current (AC). This indicates Direct Current (DC). |