It is a critical safety procedure used in industrial and maintenance work to prevent unexpected startup of machines, release of stored energy, or electrical/mechanical hazards while people are working on equipment.

✅ What Is LOTOTO Procedure?

LOTOTO involves three main steps:

1. Lock Out

Physically isolating the energy source by:

• Turning off switches or valves

• Applying locks to breakers, disconnects, or valves
  Only the person performing the work holds the key.

2. Tag Out

Attaching a tag that clearly states:

• Who locked the equipment

• Why it is locked

• When it was locked
  Tags warn others not to energize or operate the machine.

3. Try Out

After locking and tagging, you test the equipment to confirm it is truly de-energized:

• Press the start button

• Attempt to operate the valve

• Check indicators to verify zero energy

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? Why Do We Use LOTOTO?

LOTOTO is used to protect workers from dangerous energy sources such as:

• Electrical energy

• Mechanical movement

• Hydraulic pressure

• Pneumatic pressure

• Thermal energy

• Chemical or stored energy

✔ Prevents:

• Electrocution

• Crushing or entanglement injuries

• Release of pressure

• Machine start-ups during maintenance

• Fatal accidents due to stored energy

✔ Required by safety regulations

Most safety standards (OSHA, ISO 45001, etc.) require LOTOTO to prevent energy-related accidents.

✔ Ensures only authorized workers can energize the equipment

The lock ensures no one else can turn the machine back on.

? In simple terms

LOTOTO keeps workers safe by making sure a machine cannot start, cannot move, and cannot release energy while someone is repairing or cleaning it.

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