LOCK OUT/ TAG OUT ELECTRICAL SAFETY PRACTICE

Electrical power must be removed when electrical equipment is inspected, serviced, or repaired. To ensure the safety of personnel working with the equipment, power is removed and the equipment must be locked out and tagged out.

Equipment should be locked out and tagged out before any preventive maintenance or servicing is performed. Lockout is the process of removing the source of electrical power and installing a lock which prevents the power from being turned on. Tagout is the process of placing a danger tag on the source of electrical power which indicates that the equipment may not be operated until the danger tag is removed.


A danger tag has the same importance and purpose as a lock and is used alone only when a lock does not fit the disconnect device. The danger tag shall be attached at the disconnect device with a tag tie or equivalent and shall have space for the worker's name, craft, and other required information.

A danger tag must withstand the elements and expected atmosphere for as long as the tag remains in place. A lockout/tagout should be used when:

• Servicing electrical equipment that does not require power to be on to perform the service;

• Removing or bypassing a machine guard or other safety device. The possibility exists of being injured or caught in moving machinery; and

• Clearing jammed equipment. The danger exists of being injured if equipment power is turned on.

An approved procedure should be developed, implemented and followed when applying a lockout/tagout. Lockouts and tagouts are attached only after the equipment is turned off and tested to ensure that power is off. The lockout/tagout procedure is required for the safety of workers due to modern equipment hazards. An example of a standard procedure for equipment lockout/tagout is:

1. Prepare for machinery shutdown;
2. Machinery or equipment shutdown;
3. Machinery or equipment isolation;
4. Lockout or tagout application;
5. Release of stored energy; and
6. Verification of isolation.

A lockout/tagout should only be removed by the person that installed it, except in an emergency. In an emergency, the lockout/ tagout may be removed only by authorized personnel. The authorized personnel shall follow approved procedures.

The following lockout and tagout procedures and steps can effectively reduce the number of electrocutions in the workplace:

• Use a lockout and tagout whenever possible;

• Use a tagout when a lockout is impractical. A tagout is used alone only when a lock does not fit the disconnect device;

• Utilize a multiple lockout when individual employee lockout of equipment is impractical;

• Notify all employees affected before using a lockout/ tagout;

• Remove all primary and secondary power sources; and

• Measure for voltage using a voltmeter to ensure that power is.

WHAT IS ELECTRICAL SHOCK - HOW ELECTRIC SHOCK HAPPENS?

Most fatal electrical shocks happen to people who are actually knowledgeable regarding electrical shock safety precautions. A majority of the electrical shock accidents occur when an employee in a rush disregards safety precautions that they know should be followed.

The following are some electromedical facts intended to make employees think twice before taking chances. It's not the voltage but the current that kills. People have been killed by 100 volts AC in the home and with as little as 42 volts DC.

The real measure of a shock's intensity lies in the amount of current (in milliamperes) forced through the body. Any electrical device used on a house wiring circuit can, under certain conditions, transmit a fatal amount of current.

Currents between 100 and 200 milliamperes (0.1 ampere and 0.2 ampere) are fatal. Anything in the neighborhood of 10 milliamperes (0.01) is capable of producing painful to severe shock. Current values and their effects are summarized below.


The severity of the shock increases as the current increases. Below 20 milliamperes, breathing becomes labored, and it can cease completely even at values below 75 milliamperes. As the current approaches 100 milliamperes ventricular fibrillation occurs. This is an uncoordinated twitching of the walls of the heart's ventricles.

Since you don't know how much current went through the body, it is necessary to perform artificial respiration to try to get the person breathing again. If the heart is not beating, cardio pulmonary resuscitation (CPR) is necessary.

Electrical shock occurs when a person comes in contact with two conductors of a circuit or when the body becomes part of the electrical circuit. In either instance, a severe shock can cause the heart and lungs to stop functioning. Additionally, severe burns may occur where current enters and exits the body

Prevention is the best medicine for electrical shock. Employees should respect all voltages and possess the knowledge of the principles of electricity. It is important to always follow safe work procedures.

Do not take unnecessary chances. All electricians should be encouraged to take a basic course in CPR so they can aid a coworker in emergency situations.

Portable electric tools should always be well maintained and in safe operating condition. Make sure there is a third wire on the plug for grounding in case of shorts. The fault current should flow through the third wire to ground instead of through the operator's body to ground if electric power tools are grounded and if an insulation breakdown occurs.

CREATING A CULTURE OF ELECTRICAL SAFETY - AN IMPORTANT ASSET

The design of a safe plant layout is beyond the responsibility of individual employees, but it nevertheless is essential for good power production practices and safe working conditions. Narrow aisles, blind intersections, insufficient overhead space and limited access for equipment repair and maintenance all are detrimental to a safe operating environment.

The National Safety Council in the United States has estimated that work-related accidents in the private sector in 1988 cost industry an average of $15,100 per disabling injury. Based on this figure and the U.S. Bureau of Labor Statistics - which reported that in 1988 private U.S.

Industry, employing 90 million workers, had 6.2 million job-related accidents and injuries was in excess of $93 billion. Approximately, half of this total ($46 billion) was for such visible costs as damaged equipment and materials, production delays, time losses of other workers not involved in the accidents and accident reporting.

Similar statistics have been reported in the United Kingdom (UK) and in the European Community. The statistics support the premise that it is the responsibility of every employer to take a strong, proactive stance to ensure their employees' safety.

Designing for safe work environments also means proper scheduling of work activities. It should not be the operator's or worker's responsibility to determine the proper routing of work in process.

To make this type of decision a workers responsibility unfairly shifts to what is truly management's responsibility directly to the worker. It is management's responsibility to ensure that tight work standards are not only defined for each operating facility, but to ensure that procedures and policies are adopted and enforced.

Establishing fair work standards through work measurement or some similar technique is, without question, a prerogative and a right of management. Establishing and enforcing tight work standards has resulted and will continue to result in operators taking dangerous short cuts while completing tasks.

These short cuts often result in industrial accidents and injuries. By the same token, managers should use standards to ensure a fair day's pay for a fair day's work, but they should not use them as a whip to achieve maximum productivity through coercion.

Pressure placed on employees to meet tight production schedules results in the same type of problems as with tight work standards. Reasonable schedules based on reasonable capacity determinations and work standards eliminate the pressure and work-related stress placed on employees to overproduce because of unsafe short cuts.

Having a corporate culture that promotes and makes safety and environment a priority should be the goal of the industry. Creating a culture of safety first requires site-specific work practices and working environments to be carefully assessed with a focus on identifying high-risk areas, and then developing concrete plans for improved occupational and process safety performance.

Management must focus on using employee insights to prevent costly and potentially deadly accidents before they occur, creating a safer workplace by taking into account both the environment in which employees work and the culture that drives their daily work experience.

As an employer, it is your responsibility to provide a safe work environment for all employees, free from any hazards, and complying with legal and recommended best practices defined in the standards. Health and safety in the workplace is about preventing work-related injury and disease, and designing an environment that promotes well-being for everyone at work.

Knowledge is the key ingredient in providing a safe work environment. If everyone knows the correct procedures, accidents and injuries will be kept to a minimum.

Both employers and employees should:
• Ensure that the way work is done is safe and does not affect employees' health.
• Ensure that tools, equipment and machinery are safe and are kept safe.
• Ensure that ways of storing, transporting or working with dangerous substances is safe and does not damage employees' health.

Employers must:
• Provide employees with the information, instruction and training they need to do their job safely and without
damaging their health.
• Consult with employees about health and safety in the workplace.
• Monitor the work place regularly and keep a record of what is found during these checks.

Policies should be developed in consultation with employees, both with and without disability. It may be necessary to organize support persons or interpreters so that all employees may participate in the consultation.

Occupational Health and Safety (OH&S) procedures must be implemented wherever the work is being conducted, be that in an office, factory, construction site, substation, along transmission line work or home. As an employer, it is your responsibility to ensure all employees have access to information about safety procedures, and for any reasonable adjustments to be made.

It is crucial that new employees be:
• Briefed of all new staff on OH&S policy at induction.
• Be provided training on all safety procedures, including evacuation and other emergency procedures.
• Provided access to information about safety procedures, in appropriate formats.

It is crucial the existing employees:
• Have access to information in appropriate formats.
• Be provided with regular information updates and re-training sessions.
• Be provided access to information about safety procedures.
• Conduct relevant training on any new equipment or machinery.