NFPA 70E, STANDARD FOR ELECTRICAL SAFETY IN THE WORKPLACE (2024) #safetyfirst #safety #electrician #Switchgear | Power systems protection

Arc Flash Boundaries in LT and HT Systems (in Meters) Arc flash boundaries ensure safe working distances from energized electrical equipment: 1.Low Tension (LT) Systems: • Voltage: Up to 1 kV. •Arc flash boundary: Typically ranges from 1 to 2 meters, depending on fault current and clearing time. 2. High Tension (HT) Systems: •Voltage: Above 1 kV (e.g., 11 kV, 33 kV). • Arc flash boundary: 3 to 4 meters or more, depending on energy levels and system setup. Always follow NFPA 70E, IEC standards, a