Electric shock occurs when the human body becomes part of a path through which. Some pieces of test equipment are battery operated or operate at low voltage so that any haz ard is minimal. Avoid electric shock by following safe work practices for electric power tools. Electrical workers are potentially exposed to a variety of hazards such as electric shock the most common hazard, arc flashes, falls, and. Employees who work on or repair electrical equipment a.
This muscle contraction will in many cases cause the victim to remain firmly gripped to the. Ground fault detected gfci can shut off electricity flow in as little as 140 of a. Nov 22, 2019 electrical current exposes workers to a serious, widespread workplace hazard. Home electrical safety checklist keeping you and your family safe, roombyroom u. Be aware of buried, underground electrical hazards. Electrical injuries an arc flash is a release of energy caused by an electric arc figure 262. Osha 10hour safety course electrical safety page 2 of 5 four main types of electrical injuries. The second type of hazard is electrical burns and the third is the effects of blasts which include pressure. Gfcis shut off an electrical circuit when it becomes a shock hazard. Control of incidents related to electrical shock and hazards. Electrical shock electrical shock and its effects can be caused and influenced by several factors.
It focuses only on the tests and equipment needed to minimize electrical shock and does not discuss mechanicalphysical injury and fire hazards. There are a number of ways in which you can receive an electric shock, e. How electricity works operating an electric switch is like turning on a water faucet. Risk of electric shock is greater in areas that are wet or damp. Over 3 00 disabling electrical contact injuries occur annually. The electrical safety program also provides hazard awareness information to those who use electrical equipment. More than 30,000 nonfatal shock accidents occur each year. Applicable to tata power operating and project sites which cover but not limited to plant premises, switchyards, substations, offices etc. The body has its own electrical system for breathing, nerve transmission and heart rate. Design safety standards for electrical systems, and 1910. Electrical shock safety toolbox talks meeting topics. Plugs with missing ground pins should be taken out of service.
Along with the safety of your boats electrical system, it is critical for the safety of boat operators and swimmers to understand the hazard of electric shock drowning. Electrical safety codes and standards 22 working on deenergized equipment 22 establish a safe work condition 22 working on energized equipment 23 who is qualified. Electrical safety hazards 27 electric shock 27 arcflash and arc blasts 28 arcflash metrics 29 arcblast effect 31 light and sound effects 31 electrical hazard analysis 32 shock hazard analysis 32 approach boundaries 32 flash hazard analysis 34 arcflash calculations 35. What all students need to know about electrical safety b. This standard addresses arc flash and shock hazards, and there is a need for more empirical incident data on the actual hazards that may be experienced when equipment faults or adverse. Nicola tesla devised the ac alternating current system for electrical transmission. Be aware of overhead electrical hazards when using machinery, equipment or ladders. These regulations are contained in title 8 of the california code of regulations t8ccr.
This course focuses on the basic concepts of electricity, electric shock hazard and hazard controls to deal with electric shock. Many workers are exposed to electrical energy while completing their daily responsibilities, and many are unaware of the potential electrical hazards present in their work environment making them more vulnerable to the danger of electrocution. A shocks severity is measured by the amount of current flowing through the body, the length of time the body is in contact with the current, and the path the current takes through the body. You will learn about the safety model, an important tool for recognizing, evaluating, and controlling hazards. Avoid electric shock by following safe work practices for electric power tools, appliances, light fixtures, and machinery. The information contained in this booklet and the attachment is for. Electrical current exposes workers to a serious, widespread workplace hazard. Esfis boating and marina safety resources have the necessary tools to ensure that. Electrical safety in the workplace is an important topic that is addressed by nfpa 70e, standard for electrical safety in the workplace 2015 edition. Cdc electrical safety niosh workplace safety and health topic. Electrical shock, the perceptible and physical effect of an electrical current that enters the body.
Department of labor occupational safety and health. The electrical safety program esp was created to comply with electrical systems regulatory requirements to ensure that energized electrical work at purdue university facilities is performed safely by qualified electrical workers who are provided with appropriate safe work procedures, protective equipment, and other controls. Safety must not be compromised and some ground rules need to be followed first. He also stated that many emergency room physicians are unfamiliar with electric shock and that an ekg may not show a problem. Manage activitiesjobs associated with electrical hazards safely. Check with both your jurisdiction and electrical utility company when working, driving, parking, or storing materials closer than 15 m 49 feet to overhead power lines. The shock may range from an unpleasant but harmless jolt of static electricity, received after one has walked over a thick carpet on a dry day, to a lethal discharge from a power line. Electrical slide presentation occupational safety and.
The dangers of electricity, electrical shock, and the resulting injuries will be discussed. First, stop the current flowing from the circuit through the victims body, if it hasnt already been done. Nfpa 70e2004, standard for electrical safety in the workplace. Give students handout c electrical safety scenario. Understanding these terms is important to understanding shock and arcflash hazard protection. Electrical shock happens when current passes through the body.
Oshas electrical standards are based on the national fire protection association standards nfpa 70, national electric code, and nfpa 70e, electrical safety requirements for employee workplaces. Ask each group to identify at least three things that could have been done to prevent this death. Read each question carefully and choose the most correct answer by completely filling in the box next to the answer 1. Electrical workers safety handbook 1 a c k n o w l e d g m e n t handbook acknowledgment this is to acknowledge that i have received my copy of the electrical workers safety handbook. Different level of protection required as compared to household equipment. The clinical effects of electric shock include the following. The slac electrical safety program provides the slac community with the minimum knowledge of safety and recommended practices necessary to protect against electrical shock or burns. In the construction industry, about 57% of electrical injuries are burns. An electric shock can severely burn or kill if the muscle contraction is severe enough to stop the heart. In that paper, he stated that a 120volt shock can kill up to 48 hours later.
Page 7 of 49 efcog electrical safety improvement project electrical current basically, electrical hazards can be categorized into three types. Test afcis and gfcis once a month according to the manufacturers recommendations. Electrical safety home university of washington deohs. He touched exposed wires on the welding cables and. I agree to report all injuries to my foreman immediately, no matter how minor the. Installation and maintenance of electrical work 17 11. Electricity can cause electrocution, burns, fire, electric shock. This can burn both internal and external tissue and cause organ damage. Electrical shock hazards and safety standards education. Pull the victim away from the source of shock if it is safe to do so.
They should be installed inside the home in bathrooms, kitchens, garages and basements. Joseph swan demonstrated the first electric light thomas edison demonstrated the first electric light with a carbon filament lamp. How electrical shock is received if you are in contact with an energized wire or any energized electrical component, and also with any grounded object, you will receive a shock you can even receive a shock when you are not in contact with a ground if you contact both wires of a 240volt cable, you will receive a shock. An important phase of electrical safety is knowing how to help an electrical shock victim. The utility industry is the only other in which nonfatal burn injuries outnumber electrical shock injuries 76%. An electric shock occurs when electricity flows across a potential gradient from high to low concentrations.
The first and most commonly recognized hazard is electrical shock. Calosha regulations on electrical safety require california employers to provide workers with a safe and healthful workplace. About 39% of nonfatal electrical injuries are electrical burns. Osha 11 electrical safety handout a electrical safety and you. Detects a difference in current between the black and white circuit wires could happen when electrical equipment is not working properly causing a current leakage known as ground fault. An electric shock happens when an electric current passes through your body. Often, particularly in the cases of lowvoltage shock, victims are unable to pull away from the source of current. Electrical safety hazards 27 electric shock 27 arcflash and arc blasts 28 arcflash metrics 29 arcblast effect 31 light and sound effects 31. This material was produced by the workplace safety awareness council, a. How electrical shock is received if you are in contact with an energized wire or any energized electrical component, and also with any grounded object, you. Esfis boating and marina safety resources have the necessary tools to ensure that fun in the sun doesnt give way to an emergency at sea. I agree to read and follow all safety rules outlined in this booklet. If your vehicle comes into contact with a power line.
Even a single harmful event can lead to significant damage in terms of reputation and legal action. An electrical shock can affect your breathing, heart, brain, nerves and muscles. Electrical safety awareness is an introductory online safety course. Approximately 30,000 workers receive electrical shocks yearly. A secondary effect of an electric shock is the trauma which can result from falling due to the reaction from the shock. When electrical faults occur, the electrical system is subjected to both thermal and magnetic forces. Manage someone after an electric shock turn off the current source if safe to do so to prevent further damage. During an electric shock, the current passing through the body may lead to burns on the skin, muscles or internal organs. Electricity travels through closed circuits, and people, sometimes tragically, can become part of the circuit. If you must be close to power lines, you must first call your electrical utility company and they will assist you. The injury to the heart muscle tends to spread over time and.
Table of contents emory environmental health and safety. The basic guidelines regarding safe handling of electricity documented below will help you while working with electricity. Medical instrument electrical safety significance of safety 10s of thousands device related patient injuries in u. Electric shock occurs when the body becomes part of an electrical circuit. The second type of hazard is electrical burns and the third is. Check clinical signs to assess effects of the electric current on the patients body. The primary hazards associated with electricity and its use are. Electrical shock occurs when the body becomes part of the electric circuit, either when an individual comes in contact with both wires of an electrical circuit, one wire of an energized circuit and the ground, or a metallic part that has become energized by contact with an electrical conductor. When a person receives a shock, electricity flows between parts of the body or through the body to a ground. A person receiving a shock caused by grabbing a bare conductor can generally release himself when the current passing through his body is less than 15 ma. If you touch a live wire or other electrical component while standing in even a small puddle of water, you will get shocked avoid working in wet conditions whenever possible use approved electrical equipment for wet conditions and do not stand in wet areas when operating electrical equipment 14. Electrical safety frayed cords should be taken out of service.
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