What is "zero energy state" in LOTO?

The "zero energy state" in Lockout/Tagout (LOTO) refers to a condition where an equipment or machinery is devoid of any hazardous energy. This state is crucial for ensuring the safety of workers when they are performing maintenance or repair tasks. When equipment is in a zero energy state, all potential sources of energy—such as electrical, mechanical, hydraulic, pneumatic, thermal, or any other form of energy—have been effectively controlled, meaning that the equipment cannot start or release energy unexpectedly.

Achieving a zero energy state typically involves not only turning off the machine or equipment but also locking and tagging it out to prevent accidental reactivation during maintenance work. This controlled state eliminates the risk of injury from hazardous energy during servicing activities.

Understanding and recognizing the importance of a zero energy state is essential for anyone involved in LOTO practices, as it is a critical step in ensuring worker safety and compliance with OSHA regulations.