Electricity safety lockout eliminates any risk of fatal electrocution. This is through ensuring there is indeed a zero-energy state achieved in the equipment prior to the commencement of maintenance operations.
This guide explains a six-step electrical safety lockout process to isolate all energy sources, apply physical locks, and confirm de-energization. Its main focus is the most critical step: the “absence of voltage” test that verifies the lockout is effective before work starts.
What is the Definition of Electrical Lockout Tagout (LOTO)?
The lockout tagout procedure, electrical safety definition refers to the locking and tagging of any machinery in an industrial plant. This happens when such is shut down to be repaired, serviced, or maintained based on the recommended best practices outlined by OSHA.
Specifically, OSHA defines LOTO as “specific practices and procedures for safeguarding employees from the unexpected energization or startup of machinery and equipment.” OSHA 1910.147 provides these guidelines for general industry. The standard requires companies to adopt an energy control program, employee training, and periodic inspections.
What are the Electrical Lockout Tagout Procedures?
The electrical lockout/tagout procedures can be divided into six simple steps. Employees involved in repair and maintenance operations of electrical equipment have to make sure that they undertake these steps. These are for their own safety and that of other employees around them.
Step 1: Locate sources of energy and energy isolation devices.
↓
Step 2: De-energize the equipment.
Step 3: Secure energy isolation devices.
Step 4: Control and release energy storage.
Step 5: Confirm isolation of equipment.
Step 6: Apply lockout tagout electrical safety devices in accordance with the established procedures.
Bonus: General Safety Steps
The following are some general safety guidelines for handling electrical equipment, conductors, and circuits.
Make sure that all the required personal protective equipment (PPE) is worn while handling electrical equipment.
Ensure that all electrical equipment is properly installed and handled.
Proper insulation, guarding, and overcurrent protective devices are essential.
Grounding is a crucial factor in minimizing the danger associated with electricity.
Use the GFCI (ground fault circuit interrupters) that can help in breaking the circuit and interrupting the flow of current through the electrical circuit.
Use the right-sized fuse to minimize the chances of excessively high currents flowing through the wiring, resulting in electrical fires.
Avoid touching electrical sockets with wet hands.
Dry out wet or moist areas before handling electrical equipment, since water conducts electricity.
Always be aware of the location of circuit breakers, electrical panels, and fuse boxes to disconnect the electricity supply in emergencies.
If a colleague suffers an electric shock, never immediately come into direct contact. Always use a non-conductive object, like a plastic or wooden rod, to separate the worker from the source of electrical shock. If possible, shut off the power first.
Why is the Absence of Voltage Test Crucial?
The absence of a voltage test is crucial because the most dangerous assumption in maintenance is believing that power is already off. The only sure method of ensuring that the equipment is in the zero-energy state is verification. One uses a voltmeter during the no-voltage test, calibrates the meter using a known live point, and tests the equipment.
Ensure that all connections between phase-to-phase and phase-to-ground on the load side of the circuit have been measured. Even when the switch appears to be off, there could still be voltage within the system. This is due to problems such as faulty wiring and the presence of stored energy. The safety lockout process is not complete until the meter records zero readings.
OSHA 1910.147(d)(6) emphasizes this verification step for all electrical work. It serves as a final check against human error or mechanical failure. If voltage is detected, you must stop and find the source. Never proceed until the meter confirms the circuit is fully de-energized.
Case Study Happened in Real Life#1 – Arc Flash Hazard Protection in Motor Control Centers
In a paper manufacturing facility, the maintenance team locked out the motor from the breaker before removing it for replacement. While testing for the absence of voltage, they found 120 volts on what they thought was a live wire. The voltage source also came from an active secondary control circuit.
Because verification was performed, the team avoided an arc flash and applied an electrical disconnect lockout to isolate the secondary source. This case made the company adopt dual-source verification for every motor repair work.
#2 – Energy Control Program Compliance
Due to violations of safety procedures, an automobile manufacturing company enhanced its energy control program. This is by using electrical cord lockout tools and de-electrical safety lockout padlocks in various colors for every department in the company. This then helped in carrying out floor inspections and also lowered machine startup accidents by 40 percent.
Conclusion
An effective electrical safety lockout needs a disciplined method involving six steps. The core of this process is the “Absence of Voltage” test, ensuring the implementation of a lockout tagout procedure for electrical safety. Moreover, OSHA 1910.147 and ISO 45001 compliance are necessary in all industrial settings to ensure that safety hardware is used properly.
BOZZYS is a prominent supplier of LOTO components, having a production plant spanning 2,000 square meters. Our products are certified under CE, ISO 9001, and OHSAS 18001, with a focus on non-conductive locks and electrical disconnect lockout devices. We also offer custom-made safety packages for more complicated industrial settings.
Consult BOZZYS’ technical staff regarding your safety needs by implementing proper lockout procedures in your facility.
Media ContactCompany Name: Wenzhou Boshi Safety Products Co., Ltd.Email: Send EmailCountry: ChinaWebsite: https://www.bozzys.com/
