ALBAT: OSHA Electrical Transmission and Distribution (ET&D) Practice Exam

The main idea here is the minimum approach distance—the safe clearance you must keep from energized parts to prevent shock or arc flash. For lines and equipment energized to 50 kV or less, that required distance is ten feet. This serves as the baseline safety margin for the lowest voltage category; as voltage increases beyond 50 kV, the mandated distance grows in defined steps to account for higher arcing risk. In practice, you maintain this distance by staying farther away, using barriers or insulated methods, or de-energizing the equipment when possible, along with appropriate PPE if you must work within the range.