What does zero energy state mean in lockout/tagout procedures?

What does zero energy state mean in lockout/tagout procedures?

• A. The equipment is fully powered.
• B. There is no potential energy that could cause startup or release of stored energy.
• C. All energy sources are isolated but stored energy remains.
• D. Energy sources are removed by wearing gloves.

Answer: (B)

Zero energy state means there is no potential energy that could cause the equipment to start up or release stored energy while someone is working on it. In lockout/tagout, the goal is to completely de-energize and isolate the machine, and to dissipate or secure any stored energy (like pressure, springs, capacitors, or gravity) so nothing can move or re-energize unexpectedly. This ensures a safe working condition during service. So, for example, electrical energy is disconnected and verified not present, hydraulic or pneumatic pressure is released, stored mechanical energy is blocked or restrained, and any stored energy is neutralized before work begins. Wearing gloves does not remove energy or prevent a release, and having the equipment still powered or having stored energy remaining would leave a hazard present.

Zero energy state means there is no potential energy that could cause the equipment to start up or release stored energy while someone is working on it. In lockout/tagout, the goal is to completely de-energize and isolate the machine, and to dissipate or secure any stored energy (like pressure, springs, capacitors, or gravity) so nothing can move or re-energize unexpectedly. This ensures a safe working condition during service.

So, for example, electrical energy is disconnected and verified not present, hydraulic or pneumatic pressure is released, stored mechanical energy is blocked or restrained, and any stored energy is neutralized before work begins. Wearing gloves does not remove energy or prevent a release, and having the equipment still powered or having stored energy remaining would leave a hazard present.