Posting signs that clearly state the minimum safe clearance distance is a vital safety measure. High-voltage electricity can arc through the air, creating a deadly hazard even without direct contact. These signs prevent workers from getting too close with equipment such as cranes, ladders, or other long conductive objects. For instance, OSHA regulations often require a minimum clearance of 10 feet for lines up to 50 kV, with the distance increasing for higher voltages. By marking these danger zones, signs help to prevent electrocution and serious injury, which are common causes of workplace fatalities.