Symbols used in electrical equipment diagrams
Wire Color Codes
The colors of the wires on the diagrams are indicated by the following letter combinations:
| Ch | black |
| ABOUT | orange |
| Krch. | brown |
| R | pink |
| 3 | green |
| Kr. | red |
| Ser. | grey |
| Tser. | intense gray |
| F | violet |
| G | blue |
| B (Ex.) | white (transparent) |
| I am Zel | poisonous green |
| AND | yellow |
If the scheme contains a combination of two colors (for example, Kr.-Z), then the first letter indicates the main color of the wire, and the second letter indicates the color of the strip.
