SEPTA Bus Mechanic – Electrical, Mechanical, and Safety Practice Test 2026 - Free Practice Questions and Study Guide

Wearing PPE on high-voltage work is essential because it provides a critical barrier against the two main electrical hazards: electric shock and arc flash. High-energy faults can occur unexpectedly, and arc flash can burn skin, eyes, and lungs, as well as cause blast injuries from the rapid release of energy. NFPA 70E guides how to assess the incident energy at the work area and select appropriate PPE to protect against that energy. The proper gear—arc-rated clothing, voltage-rated insulating gloves, face shields or hoods, and other protection—reduces heat transfer and protects the body from burns and flying debris. PPE is a required safety measure, not something optional for experienced workers, and it complements other controls like de-energizing equipment and safe work procedures.