What To Know
- A lockout involves physically securing a circuit breaker or electrical switch in the “OFF” position using a padlock or lockout tag.
- A tagout involves attaching a warning tag to the circuit breaker or electrical switch indicating that it should not be operated.
- The person performing the work on the electrical equipment or circuit is responsible for locking out the circuit breaker.
Circuit breakers are crucial safety devices that protect electrical systems from overloads and short circuits. However, working on energized circuits can be highly hazardous, making it essential to properly lockout circuit breakers before performing maintenance or repairs. A lockout procedure ensures that the circuit is de-energized and cannot be accidentally re-energized, preventing electrical accidents and injuries.
Step-by-Step Guide to Lockout Circuit Breakers
1. Gather Necessary Equipment
Before starting, gather the following equipment:
- Lockout device (padlock, hasp, or lockout tag)
- Key or combination for the lockout device
- Voltage tester
- Non-conductive gloves and safety glasses
2. Identify and Isolate the Circuit
Locate the circuit breaker controlling the circuit you need to work on. Turn off the circuit breaker and verify that it is in the “OFF” position.
3. Test for Voltage
Use a voltage tester to confirm that the circuit is de-energized. Touch the tester probes to the terminals of the circuit breaker. If the tester indicates voltage, do not proceed.
4. Label the Lockout Device
Clearly label the lockout device with your name, the date, and the reason for the lockout. This information will help prevent unauthorized access or removal of the lockout.
5. Install the Lockout Device
Attach the lockout device to the circuit breaker handle or lockout hole. Ensure it is securely fastened and cannot be easily removed.
6. Verify the Lockout
Re-test the circuit breaker terminals with the voltage tester to confirm that it is still de-energized. If the tester indicates voltage, the lockout is not effective and should be re-installed.
7. Document the Lockout
Create a record of the lockout, including the date, time, circuit breaker location, and the reason for the lockout. Keep this record for future reference and compliance purposes.
Safety Precautions
- Always wear non-conductive gloves and safety glasses when working with electrical equipment.
- Never work on energized circuits.
- Use only approved lockout devices.
- Inspect lockout devices regularly to ensure they are in good condition.
- Train personnel on proper lockout procedures.
- Follow all applicable safety regulations and codes.
Compliance Considerations
Locking out circuit breakers is a requirement of the Occupational Safety and Health Administration (OSHA) and other regulatory bodies. Compliance with lockout procedures helps prevent electrical accidents and ensures the safety of workers and the public.
When to Lockout Circuit Breakers
Lockout circuit breakers in the following situations:
- Before working on electrical equipment or circuits
- When servicing or repairing electrical equipment
- During electrical system upgrades or modifications
- When testing or troubleshooting electrical systems
Benefits of Circuit Breaker Lockouts
- Prevents electrical accidents and injuries
- Protects workers and the public
- Ensures compliance with safety regulations
- Reduces the risk of equipment damage
- Improves electrical system maintenance efficiency
Troubleshooting Common Lockout Issues
- Circuit breaker cannot be locked out: Verify that the lockout device is compatible with the circuit breaker handle. Try a different lockout device or consult the manufacturer’s instructions.
- Voltage is still present after lockout: Re-test the circuit breaker terminals using a voltage tester. If voltage is still present, the lockout is not effective and should be re-installed.
- Lockout device is missing or damaged: Replace the lockout device with an approved one immediately. Document the incident and investigate the cause.
What You Need to Learn
Q: What is the difference between a lockout and a tagout?
A: A lockout involves physically securing a circuit breaker or electrical switch in the “OFF” position using a padlock or lockout tag. A tagout involves attaching a warning tag to the circuit breaker or electrical switch indicating that it should not be operated.
Q: Who is responsible for locking out circuit breakers?
A: The person performing the work on the electrical equipment or circuit is responsible for locking out the circuit breaker.
Q: How long should a circuit breaker remain locked out?
A: The circuit breaker should remain locked out until the work is completed and the circuit is ready to be re-energized.
Q: What should I do if I find a circuit breaker that is not locked out?
A: If you find a circuit breaker that is not locked out, do not operate it. Report the issue to your supervisor or a qualified electrician immediately.
Q: What are the penalties for not following lockout procedures?
A: Failure to follow proper lockout procedures can result in serious electrical accidents and injuries. It can also lead to fines and penalties from regulatory agencies such as OSHA.
