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

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

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

Answer: (C)

Color coding is used to quickly identify voltage levels on cables. Blue is the color used to mark low- or medium-voltage cables, which helps responders distinguish them from high-voltage lines, typically orange. Seeing blue signals that the conductor is within the lower to mid range of voltage, prompting appropriate precautions and de-energization steps as available. Other colors correspond to different electrical designations (for example, live/hot or earth in various standards), so blue serves as the practical cue for low- to medium-voltage identification in this context.

Color coding is used to quickly identify voltage levels on cables. Blue is the color used to mark low- or medium-voltage cables, which helps responders distinguish them from high-voltage lines, typically orange. Seeing blue signals that the conductor is within the lower to mid range of voltage, prompting appropriate precautions and de-energization steps as available. Other colors correspond to different electrical designations (for example, live/hot or earth in various standards), so blue serves as the practical cue for low- to medium-voltage identification in this context.