Final answer:
If a tag falls out when opening a breaker box, it's important to pick it up and read it, as it might contain critical safety information. The presence of a ground connection is essential for preventing electric shocks, and any issues with grounding should be resolved immediately.
Step-by-step explanation:
When opening a breaker box and a tag falls out, the first thing you should do is pick up the tag and determine its importance. This tag could contain crucial information regarding the circuitry or safety warnings. If the tag indicates that a particular circuit is not grounded or there are any other safety-related notes, it's essential to address the issue immediately. A ground connection is vital for safety as it enables a circuit breaker to trip in case of an electrical fault, thus preventing severe electric shocks, especially in areas with water present. If the ground connection is not intact, it could pose a significant hazard that needs correcting before using the electrical system.