MSHA's Safety Targets Program
Lock Out/Tag Out (Metal/Nonmetal)
The Do's and The Don'ts
- Follow the Lock Out/Tag Out procedure established by your company.
- Personally de-energize, lock out and tag out all power circuits and electrical equipment before any work is done on such circuits and equipment.
- Personally de-energize, lock out and tag out all start-up switches on mechanical equipment before any work is done on such equipment.
- Make sure that each person working on an electrical circuit or system applies his or her own personal lock and tag.
- Make sure that all persons, including you, are in a safe location before energizing any equipment.
- Wear appropriate Personal Protective Equipment, including electrically rated gloves, hard hat, and eye protection.
- Always maintain de-energizing devices in operable condition.
- Always block machinery against motion even after it has been locked out and tagged out.
- Always familiarize yourself with electrical circuits before you perform any electrical work. Ask for help or consult a wiring diagram/schematic.
- Make sure that electrical work is performed only by a qualified electrician or persons trained to do electrical work under the direct supervision of a qualified electrician.
- Make sure that all electrical circuits and circuit breakers are properly identified before troubleshooting or performing electrical work.
- Check for proper grounding of power conductors where required.
- Use properly rated non-contact voltage testers to ensure that circuits are de-energized.
- Provide an audible or visible warning system to warn persons that a conveyor is starting.
- Maintain electrical meters and testing instruments in good condition to verify that the circuit is de-energized before beginning work.
- Communicate your intentions to work on an electrical circuit to ensure the circuit is, and remains, protected.
- Provide safe access to all working areas.
- Discharge all capacitors after the circuit has been locked out.
- Relieve hydraulic and pneumatic pressure after equipment has been locked out and before performing maintenance.
- Isolate all energy sources, including electric, hydraulic, mechanical and pneumatic, before commencing work.
- Never defeat manual or automatic de-energizing devices.
- Never remove guarding to perform maintenance or inspection until the machine has been properly de-energized and locked out.
- Never perform maintenance or work on moving machines.
- Never rely on someone else to de-energize or disconnect a circuit for you.
- Never remove someone else's lock or tag.
- Never perform work on an electrical circuit before testing to make sure it has been de-energized.
- Never remove or disturb an electrical lock or tag.
- Never assume that a circuit breaker will not be reset by someone else. Always lock it out.
- Never loan or share your lock or key with someone else.
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