Low- or medium- voltage cable can be identified by a which color?

• A. Red
• B. Yellow
• C. Blue
• D. Green

Answer: (C)

In vehicle rescue situations, cables are color-coded to show the voltage level they carry. Blue is used to identify low- or medium-voltage lines, signaling to responders that these conductors can still be energized and require appropriate caution, but are not part of the high-voltage system. This helps crews distinguish them from high-voltage circuits, which are typically marked with orange and demand extra safety measures and isolation procedures. The other colors correspond to different designations or warnings and aren’t the standard indicators for low- or medium-voltage cables in this context. So blue is the cue that those cables are the lower-voltage part of the vehicle’s electrical system.