Ever worked near heavy machinery or electrical equipment? If yes, then you know how risky it can get during maintenance or repairs. That’s where lock out procedures in the workplace come into play.
These safety steps are designed to prevent accidental startup of machines while they’re being serviced. Without them, workers could get seriously injured—or worse.
In fact, according to the Occupational Safety and Health Administration (OSHA), proper lockout/tagout procedures prevent an estimated 120 fatalities and 50,000 injuries each year in the U.S. alone.
That’s why every team—no matter the industry—should understand and apply these procedures correctly.
What Are Lock Out Procedures?
Lock out procedures (often called lockout/tagout or LOTO) are a set of safety protocols used to make sure machines or equipment are completely shut off and cannot be restarted until maintenance or servicing is complete.
This involves:
- Shutting off energy sources
- Locking the switches or valves in the “off” position
- Tagging the lock with a warning label that shows who is working on it
It sounds simple, but skipping even one step can be dangerous.
Step-by-Step: How Lock Out Procedures Work
Here’s how lock out procedures in the workplace usually go, broken into easy-to-follow steps:
1. Preparation
Know what you’re working with. Identify all energy sources—electric, hydraulic, pneumatic, etc.—and understand how to shut them down properly.
2. Notify Affected Employees
Before doing anything, inform coworkers that the equipment will be locked out and not available for use.
3. Shutdown
Turn off the equipment using the normal operating controls (e.g., power switch, start button).
4. Isolation
Disconnect the machine from all energy sources:
- Unplug electrical cords
- Shut off valves
- Bleed off hydraulic pressure
- Discharge capacitors
5. Lock and Tag
Attach lockout devices (like padlocks) to each energy source and add a tag that includes:
- The name of the person doing the work
- The reason for the lockout
- The date and time
6. Release Stored Energy
Even when powered down, machines can hold dangerous energy. Make sure to:
- Drain fluids
- Release compressed air
- Secure moving parts
7. Verify Isolation
Double-check! Try turning on the equipment to confirm it won’t start. This is a crucial safety step.
8. Perform Maintenance or Service
Only after all these steps should maintenance begin.
9. Remove Lockout Devices (When Safe)
Once the job is done:
- Inspect the area
- Notify coworkers
- Remove locks and tags (only by the person who placed them)
- Restart the equipment safely
Common Mistakes to Avoid
Even with training, people sometimes make dangerous errors. Here are a few to watch out for:
- Forgetting to verify that energy is fully off
- Skipping the “tag” part of lockout/tagout
- Using personal padlocks with no identification
- Not checking for stored energy
- Allowing unauthorized workers to restart equipment
When Are Lock Out Procedures Required?
You should follow lock out procedures any time a machine is being:
- Cleaned
- Repaired
- Inspected
- Adjusted
- Moved or relocated
This applies to electrical panels, conveyor belts, presses, saws, HVAC systems—you name it.
Final Thoughts: Safety Starts with You
Lock out procedures in the workplace aren’t just for electricians or maintenance teams. They’re for everyone’s safety—from the plant floor to the office.
Following these steps could mean the difference between a normal day at work and a life-changing accident.
So next time you see a “DO NOT OPERATE” tag or a red padlock on a machine, remember: someone’s life could depend on it.
Stay safe. Lock it out. Tag it out. Every time.