Lockout Verification
Is lockout verification the same as applying the lock?
No. Applying the lock is the isolation step; verification is the separate confirmation that isolation is effective and the machine is actually de-energized/inoperable.
What is the most common verification method under Canadian guidance?
A controlled attempt to start the machine and confirm it does not start, after ensuring it is safe to perform the test.
When should verification occur?
After the relevant energy-isolating device(s) are locked out and before work begins; WorkSafeBC also indicates verification should occur after each device or group of nearby devices is locked out, where applicable.
Lockout verification is the required step of confirming that hazardous energy has actually been isolated and the machine/equipment cannot start or move before a worker begins servicing, maintenance, clearing jams, or other exposed work. WorkSafeBC regulations require an effective means of verifying lockout and that the worker verify all energy sources have been effectively locked out before commencing work.
On a manufacturing or shop floor, lockout verification is typically performed after applying each lockout device by attempting a normal start of the equipment and confirming no response, or using another verification method appropriate to the energy source and task. WorkSafeBC specifies testing the effectiveness of de-energization and lockout after each energy-isolating device is locked out or after a group of nearby devices is locked out, ensuring no one is exposed to new hazards during the test. CCOHS guidance includes operating controls to observe no response and visual checks like confirming electrical connections are open or suspended parts are blocked. This applies to all energy sources, not just electrical power.
Skipping the verification step entirely and assuming that because a lock is on, the machine is safe; WorkSafeBC requires the worker to verify lockout before work begins.
Verifying in a way that creates risk, such as testing when workers are still in the hazard zone or when an ineffective test could cause unexpected movement; WorkSafeBC says to ensure all workers are clear and no hazard will be created if the process is not effective.
Verifying only one energy source when multiple sources exist, such as electrical, pneumatic, hydraulic, gravity, or stored mechanical energy; both WorkSafeBC and CCOHS emphasize controlling and verifying the relevant energy sources before servicing.