Lockout/Tagout (LOTO) for Electrical Safety
The Problem
Each year, workers are seriously injured or killed because machinery or electrical systems are unexpectedly energized during maintenance or servicing. These incidents are entirely preventable with the proper use of Lockout/Tagout (LOTO) procedures. Today, we’ll discuss why LOTO is critical and how to ensure systems remain de-energized until it's safe to proceed.
Identify the Hazards
- Unexpected Energisation: Electrical systems or machinery can start without warning if not correctly isolated.
- Residual Energy: Even when switched off, stored energy (such as capacitors, pressure, or hydraulic force) can cause serious injuries.
- Human Error: Failing to follow LOTO procedures can result in electric shock, burns, or electrocution.
Safety Practices and Preventative Measures
Notify Employees: Let affected workers know that LOTO procedures are being implemented.
Turn Off Equipment: Shut down the equipment using normal operating controls.
Isolate Energy Sources: Switch off and isolate using circuit breakers, isolation switches, or valves.
Apply Lockout/Tagout Devices: Secure with a lock and attach a visible tag to prevent accidental re-energization.
Test the System:
- Confirm all energy sources are de-energized before beginning work.
- Attempt to start the equipment to ensure there is no residual energy.
Use Tags for Communication:
- Tags must state the reason for the lockout, who applied it, and the date.
- Tags act as a visible warning and are part of the isolation system.
- Proper Removal of Devices:
- Only the person who applied the lock and tag is permitted to remove them.
- Do so only after confirming it is safe to restore power.
Real-Life Case or Scenario
A maintenance worker was electrocuted while working on a machine because another employee re-energized the equipment without checking. Proper LOTO procedures would have prevented the incident by ensuring only the person who locked out the system could restart it.
Employee Responsibilities
- Always follow LOTO procedures before servicing electrical systems or machinery.
- Ensure locks and tags are correctly applied and secure.
- Never bypass or remove another worker’s lock or tag.
- Report any unsafe LOTO practices immediately.
Employer Responsibilities
- Provide compliant LOTO devices and ensure they are maintained in good condition.
- Train workers on the LOTO process and the importance of following it.
- Implement a written LOTO policy and ensure it is followed across all applicable tasks.
- Monitor compliance and investigate any LOTO breaches.
Discussion & Questions
- "What steps do you take to confirm equipment is de-energized before starting work?"
- "Have you ever encountered a time when LOTO was not followed? What happened?"
Encourage open discussion around experiences and concerns with LOTO on-site.
Commitment/Action Plan
Starting today, let’s commit to following LOTO procedures for every task involving electrical isolation. If you notice missing devices or see something unsafe, speak up immediately. LOTO is a team effort—everyone has a role in keeping the worksite safe.
Wrap-Up
Electrical safety starts with isolation. Lockout/Tagout saves lives by ensuring equipment stays off while work is being done. Thank you for prioritising safety and making LOTO a standard part of your daily routine.
Standards Overview
Under the Canada Labour Code and provincial occupational health and safety regulations, employers must ensure all reasonably practicable steps are taken to eliminate or minimize the risk of harm from energized systems. This includes:
- Implementing energy isolation procedures during maintenance
- Ensuring the correct use of lockout/tagout devices
- Training workers in electrical safety, including control of hazardous energy
- Following best practices such as those outlined in CSA Z462: Workplace electrical safety and CCOHS guidance on energy control procedures.
Disclaimer
“The information provided in this toolbox talk is intended for informational and educational purposes only. It is not a substitute for professional legal, safety, or regulatory advice. The content reflects general best practices and industry standards but may not be applicable to all workplace environments or jurisdictions.
It is the responsibility of employers, supervisors, and workers to ensure compliance with applicable federal, provincial, and territorial laws, regulations, and standards, including but not limited to those set by the Canadian Centre for Occupational Health and Safety (CCOHS) and relevant provincial occupational health and safety authorities. Site App Pro, its affiliates, agents, or representatives—as well as the authors, presenters, and distributors of this toolbox talk—assume no liability for the use or application of the information provided.
Participants are strongly encouraged to consult appropriate legal, safety, or regulatory professionals regarding specific workplace concerns or questions. Always adhere to your organisation’s policies and procedures for health and safety and hazard management.
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