What color tag should be used at the grounding block?

The use of a green ground tag at the grounding block is standard because green is universally recognized as the color that indicates grounding or earth connections. Grounding is crucial in electrical systems to ensure safety and reliability by providing a path for fault currents to flow safely to the ground. Properly tagging grounding points helps technicians quickly identify and differentiate them from other types of connections, reducing the risk of accidental mistakes during maintenance or troubleshooting.

The use of other colors such as white, red, or blue does not align with this universally accepted color-coding convention. White tags generally indicate neutrals, red tags might be used for specific circuits or signaling applications, and blue tags usually signify telecommunication or data-related connections. Therefore, using a green tag for grounding helps maintain consistency and clarity within the electrical and telecommunications fields, ensuring that all technicians, regardless of their specific background, can recognize the grounding block's function immediately.