Lock Out Tag Out Try Out

Why Does Lock Out Tag Out Try Out Matter?

Picture this: You're a maintenance technician at a manufacturing plant. But what if someone—anyone—accidentally turns it back on while you're working? What if the hydraulic system still has pressure? And it looks straightforward, right? You need to replace a motor on a piece of heavy machinery. Just shut it off, pop the panel, swap the motor. What if the electrical system hasn't fully discharged?

That's where Lock Out Tag Out Try Out comes in. It's not just a catchy acronym—it's your literal life insurance policy.

The Real Cost of Skipping LOTO

I know what you're thinking: "Come on, it's just paperwork." But let me tell you something from my years of covering industrial safety. The companies that treat LOTO as a checkbox exercise? They're playing Russian roulette with their people's lives. In 2022 alone, OSHA reported over 200 fatalities from machinery-related incidents—many of them preventable with proper LOTO procedures.

The short version is this: when you skip Lock Out Tag Out Try Out, you're not just risking a fine from OSHA. You're risking fingers, arms, and sometimes lives.

What Is Lock Out Tag Out Try Out?

Let's break this down without the corporate jargon. Lock Out Tag Out Try Out is a systematic approach to ensuring dangerous machinery is properly shut off and cannot be restarted during maintenance or servicing.

The Three T's Explained

Lock Out means physically securing energy-isolating devices so they can't be operated. This isn't about putting a piece of tape on a switch—it's about actual locks that only authorized personnel can remove.

Tag Out involves attaching warning tags to the locked devices. These aren't decorative stickers; they're clear, visible warnings that say "DO NOT OPERATE—PERSONNEL WORK IN PROGRESS."

Try Out is the step most people skip, and it's the most critical. This is where you actually verify that the equipment is dead and won't surprise you with unexpected energy release.

Why People Actually Care About LOTO

Here's what most safety manuals won't tell you: LOTO isn't just about following rules. It's about respect—for your colleagues, for your own safety, and for the responsibility that comes with working around dangerous machinery.

When LOTO Goes Wrong

I spoke with a plant manager in Ohio who shared what happened when his team tried to save time by skipping the "try out" phase. A technician was replacing a conveyor belt drive. Here's the thing — they locked it out, tagged it, but never tested that the electrical system was fully discharged. So when another worker came by and saw the lock, he assumed everything was safe. He reached to adjust something nearby—and got a nasty shock from residual electricity in the system.

The investigation found that proper LOTO procedures could have prevented not just the injury, but also the $200,000 in lost production time and the eventual lawsuit that nearly bankrupted the company.

The Hidden Benefits

Beyond keeping people alive and limbs attached, proper LOTO procedures create a culture of safety. They're more likely to follow procedures themselves. On the flip side, when workers see that management takes these procedures seriously, they're more likely to speak up about hazards. It becomes self-reinforcing.

How Lock Out Tag Out Try Out Actually Works

Let me walk you through what this looks like in practice, step by painful step.

Step 1: Preparation and Shutdown

Before you touch a single lock, you need to identify what energy sources are feeding that equipment. Is it electrical? Hydraulic? Pneumatic? Mechanical? Thermal? Steam? Each type requires different approaches.

I've seen experienced mechanics freeze because they didn't realize a piece of equipment had both electrical and hydraulic energy sources. The electrical was dead, but the hydraulic system still had 3,000 PSI pressing on a valve that could send someone flying.

Step 2: Isolation and Lockout

We're talking about where the actual locking happens. You isolate the energy source and apply your lock. Here's the thing most people get wrong: each worker involved in the job needs their own lock. You can't share locks. If three people are working on something, there need to be three locks.

Why? Because when the first person finishes and removes their lock, the other two still need protection. If they're all sharing one lock and the first person goes to lunch, suddenly the other workers are exposed.

Step 3: Tag Out Application

The tag serves as communication. And it tells everyone in the area that work is in progress and the equipment should not be operated. But here's what I've learned from talking to safety coordinators: tags alone are worthless without locks.

I knew a foreman who once said, "Tags are for people who don't want to get sued.So " He was joking, but there was truth in it. Tags communicate intent, but locks enforce safety.

Step 4: The Critical Try Out Phase

This is where most procedures fall apart. The "try out" isn't just about flipping a switch and seeing if the motor spins. It's about verifying that all energy sources are properly controlled.

For electrical systems, this means testing with a properly calibrated meter. Not just any meter—your average multimeter from the break room won't cut it. You need equipment that meets specific standards and is regularly calibrated.

For hydraulic systems, you might need to relieve pressure through proper valves. For pneumatic systems, you might need to bleed off compressed air. And for mechanical systems, you might need to use blocking devices or other mechanical restraints.

Step 5: Stored Energy Release

Here's where people get lazy: stored energy. Springs, weights, capacitors, hydraulic fluid under pressure—these all store energy that can surprise you.

I remember visiting a facility where a technician was replacing a governor on an industrial fan. They'd shut it down and locked it out, but they forgot about the massive flywheel that kept spinning. In real terms, when they went to adjust something, the flywheel caught their hand between two components. The injury could have been fatal.

Want to learn more? We recommend lock out tag out procedures template and osha regulations on lock out tag out for further reading.

The try out phase includes identifying and safely releasing all stored energy.

Common Mistakes That Get People Hurt

Let's talk about where things actually go wrong, because that's where learning happens.

Mistake Number One: Skipping the Try Out

I've interviewed dozens of workers who said, "We always lock it out, but we never test it." That's like putting a seatbelt on and forgetting to buckle it. The gesture feels right, but it doesn't accomplish anything.

The try out isn't optional—it's the whole point. If you can't verify that your lockout has actually worked, you're gambling with your safety.

Mistake Number Two: Incomplete Energy Assessment

Most equipment has multiple energy sources. I once consulted on an incident where workers were changing a blade on a saw. Worth adding: they locked out the electrical, but they didn't realize the belt drive was spring-loaded. When they went to remove the blade, the tension released and the blade shot across the room, missing their colleague's head by inches.

Complete energy assessment means thinking about every possible source of energy—electrical, mechanical, hydraulic, pneumatic, thermal, chemical, and even gravitational.

Mistake Number Three: Sharing Locks or Tags

I know this seems like a time-saver, but it's a safety nightmare. On top of that, each person involved in the maintenance needs their own lock. If someone gets locked out of their own safety because they're sharing locks, that's on you.

Mistake Number Four: Poor Communication

Tags aren't just for show—they're communication tools. Also, when you remove your lock, you need to update the tag to show that you're done. And if someone else needs to work on the same equipment, they need to know the status.

What Actually Works in Practice

After covering hundreds of incidents and speaking with safety professionals across industries, here's what I've learned actually works.

Create a Culture, Not Just a Procedure

The best LOTO programs aren't enforced by fear of punishment—they're embraced because workers understand why they matter. When a new hire sees that everyone follows the procedure religiously, they don't question it. They follow it.

Invest in Proper Training

I know training sounds expensive, but calculate the cost of one serious incident. You'll find that proper training pays for itself many times over. And training isn't a one-time event—it's ongoing education.

Make It Easy to Do the Right Thing

If your

If your lockout stations are scattered across the facility, if the right locks and tags aren't readily available, if the procedures are buried in a three-ring binder nobody opens—you've built a system that fights the people using it. The best programs put everything at the point of use: color-coded locks, standardized tags, machine-specific procedures posted right on the equipment. When doing it right is easier than doing it wrong, compliance stops being a battle.

Audit Relentlessly, But Constructively

Walk the floor. Because the energy source is in a different room? Not to catch people failing, but to understand where the friction lives. Because the lock doesn't fit? Are workers skipping steps because the procedure is unclear? Every deviation is data. Watch the work. Use it to improve the system, not to punish the person.

Plan for the Exceptions

Shift changes. Contractors. In real terms, emergency repairs. Here's the thing — multi-day jobs. These are where LOTO falls apart. Have written, practiced protocols for each scenario. But who holds the keys during shift handoff? But how does a contractor integrate into your system? What happens when the authorized employee goes home sick? If you haven't answered these questions before they happen, you'll answer them badly when they do.

Document Everything—But Keep It Usable

Documentation serves two masters: regulators and workers. Regulators want completeness. Workers need clarity. The sweet spot is machine-specific procedures with photos, clear step numbering, and energy source maps that a tired mechanic can read at 3 AM. If your procedure requires a lawyer to interpret, it's not a safety document—it's a liability shield.

The Human Element

Here's what the regulations don't say: Lockout/Tagout is fundamentally about trust.

When you apply your lock, you're trusting that the procedure is accurate. That the energy sources are all identified. That nobody will remove your lock before you're done. In real terms, that the try out will actually prove zero energy. That your coworkers respect the system as much as you do.

Every time the system works, that trust deepens. Every shortcut, every "just this once," every shared lock or skipped verification—it erodes the foundation.

The workers who survive decades in this industry aren't the lucky ones. They're the ones who built habits so strong they don't have to think about them. Who treat every lockout like it's the one that matters—because it is.

The Bottom Line

You don't get a do-over with stored energy. There's no "oops" when a hydraulic line bursts at 3,000 PSI, when a capacitor discharges across your chest, when a spring-loaded mechanism releases with the force of a small explosion.

The procedure is boring. Plus, the locks are heavy on your belt. Now, the paperwork is tedious. The try out takes five minutes you'd rather spend on the repair.

Do it anyway.

Because the alternative isn't a write-up or a fine. Even so, the alternative is the phone call no safety manager ever wants to make. The alternative is a family waiting in a hospital hallway. The alternative is standing at a graveside knowing—knowing—that five minutes of verification would have changed everything.

Lock it out. Tag it out. Try it out.

Every single time.

Your life, and the lives of the people working beside you, depends on nothing less.