LOTO: Isolation Is Not Complete Until Zero Energy Is Verified

Why this matters in food manufacturing Lockout/tagout is not complete when a padlock is fitted. Safe isolation requires identifying all energy sources, isolating them, preventing reconnection, dissipating stored energy and proving the equipment is in a zero-energy state. Food machinery can contain electrical, pneumatic, hydraulic, thermal, gravity, pressure and mechanical stored energy at the same time. 1. Identify every source Use drawings and physical inspection. Consider remote supplies, shared panels, backfeeds, accumulators, springs, raised components, steam, hot water and trapped pressure. Do not assume the local isolator removes every hazard. 2. Lock and control Apply personal or group lockout in line with site procedure. Tags communicate information but do not replace a secure isolation device where locking is possible. Group work requires clear control of keys, shift handover and responsibility so no person can be exposed by another person’s action. 3. Dissipate stored energy Bleed pressure, discharge capacitors where applicable, lower or mechanically secure raised parts and allow thermal energy to reach a safe state. Where energy cannot be fully dissipated, use engineered restraint and a task-specific safe system. 4.…