Verifying Lockout Effectiveness
What verification means
| Step | Practice |
|---|---|
| Identify | All energy sources, not just electrical |
| Isolate | Switch off and lock, one lock per person |
| Dissipate | Release pneumatic, hydraulic and stored energy |
| Verify | Try to start, and confirm instruments read zero |
| Restore | Clear tools and people before removing locks |
Common gaps
- Forgetting gravity: an arm held up by a brake can still fall.
- Assuming a valve is closed because the handle is turned.
- Leaving keys with someone who has gone home.
Lockout procedures must match the site's regulations and the equipment instructions.