Applying Lockout/Tagout Devices
Locking out.
A lockout device is applied after the operating controls have been turned off or returned to the 'neutral' or 'off' position. The energy-isolating device must be operated in such a way that it completely isolates the energy source(s) from the equipment or machinery it controls.
For most energy-isolating devices, this means:
- Electrical disconnect switches: The lockout device should ensure that the switch remains in the "off" or "open" position.
- Valves for gas or liquids: The lockout device must keep the valve in the fully "closed" position to prevent flow.
- Mechanical devices: The lockout device should prevent any movement or release of stored energy (e.g., springs, weights).
The key principle is that the lockout device must physically prevent the energy-isolating device from being operated, ensuring worker safety.
Tagging out. Tagging out is a procedure for placing a warning tag or sign - a tagout device - on an energy-isolating device. Remember, tagout devices must control hazardous energy at least as effectively as lockout devices.
Bottom line: If you can lock it out, do not use tags.
Knowledge Check Choose the best answer for the question.
6-5. Lockout devices must secure energy-isolating devices _____.
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