electricity and human body
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The document discusses the basics of electricity including definitions of ampere, volt, ohm, conductor, insulator, and dielectric. It then covers the harmful effects electricity can have on the human body, including burns, shocks, and internal injuries. Different types of burns are examined such as entrance and exit wounds, arc burns, and thermal contact burns. Electrical safety practices are also mentioned such as grounding and safety equipment.
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The document discusses electrical safety topics including physiological effects of electricity, susceptibility parameters, distribution of electrical power, isolated power systems, macroshock and microshock hazards, electrical safety codes and standards, ground fault circuit interrupters, equipment design, and electrical safety testing. It covers electrical hazards in clinical environments, thresholds for electrical stimulation and injury, factors that influence susceptibility to electrical currents, and mechanisms for protecting against macroshocks and conducting leakage currents safely.
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Electrical safety involves measures to prevent harm from electricity. Voltage, resistance, and current govern electron flow through circuits. Voltage is measured in volts, resistance in ohms, and current in amperes. Electric shock occurs when the body becomes part of a circuit, and its effects depend on current, duration, energy type, and body condition. Proper grounding, insulation, disconnects, and maintenance help prevent electric shock and fires from arcs or overheating. Hazardous locations require explosion-proof equipment due to ignition risks from gases, dusts or fibers.
Report on Electrical Safety
The document provides an introduction to electricity including its definition, uses, generation, transmission, and distribution. It discusses the various dangers of electricity including electric shock, burns, neurological damage, ventricular fibrillation, arc flash, and statistics on electrical accidents. The dangers are higher from electrical installations in public places where safety precautions are not taken. Indian Electricity Rules 36 and 40 mandate safety requirements for handling electrical supply lines and apparatus as well as street boxes, but as images later show, these rules are often not followed. Ensuring electrical safety, especially in public areas, is important to minimize accidents.
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electricity and human body
- 1. Elec P. C. Mishra,Ex. Er. Electrical
- 2. WELCOME We are discussing and presenting :- BASICS EFFECTS ON HUMAN BODY BURNS SHOCK ECG EEG ECT ELETRCUTION ELECTRICAL SAFETY SAFE PRACTICES GROUNDING SAFETY EQUIP A VIDEO PRESENTATION YOUR RESPONSE IN CASE OF ELECT. ACCIDENT
- 3. BASICS; HUMAN BODY FOR ELECTRICITY AMPERE FERNCH- Mr. A. M. AMPERE VOLT ITALIAN- Mr. A. VOLTA OHM GERMAN- Mr. G .S. OHM CONDUCTOR INSULATOR
- 4. BASICS DIEELECTRIC NON AVAIBILITY OF MOBILE ELECTRONS FOR ELECT. CONDUCTION DIEELECTRIC STRENGTH POT. GRAD. REQ. TO CAUSE BREAK DOWN INSULATION. DRY AIR-3 KV/mm FLASH OVER DISCHARGE WHICH TAKES OVER THE SURFACE OF AN INSULATOR INCASE OF BREAKDOWN. IT IS LUMINIOUS ELECT. ARC HIGHLY LUMINIOUS INTENSELY HOT SELF SUSTAINING ELECT. DISCHARGE BETWEEN TWO ELECTRODES USUALLY STARTS WHEN ELECTRODES CARRYING AN ELECT. CURRENT ARE DRAWN APART.
- 5. Electrical Arc Arc Flash Electrical Discharge Through Dielectric
- 7. Note The Line is LIVE 11 KV Watch the Daring Man !! What is going to happen?
- 8. Just after few seconds later of previous snap Bang !!! A Flash Over
- 9. Failure of Dielectric strength of Air.
- 10. STEP POTENTIAL P.d. Across one step of human being i.e aprox. 0.8 meter on the ground TOUCH POTENTIAL P.d across touch point of object and ground.
- 11. EARTHING Earth is largest conductor which has a constant potential in spite of losing or gaining any charge Covers the problem relating to conduction of electricity as a low impedance return path of the fault current
- 13. Earth wires all along the electrical wiring in the home
- 14. Harmful Effect of Electricity on Human Body 1.BURN 2. SHOCK SC- dead cells is being shed and replaced continiously
- 15. BURN EVALUATION BURN DEGREE & % SURFACE AREA Effected.
- 22. Entrance Wound: High resistance of skin transforms electrical energy into heat, which produces burns around the entrance point (dark spot in center of wound). This man was lucky, the current narrowly missed his spinal cord. Exit Wound: Current flows through the body from the entrance point, until finally exiting where the body is closest to the ground. This foot suffered massive internal injuries, which weren't readily visible, and had to be amputated a few days later.
- 23. Arc or Flash Burns This man was near a power box when an electrical explosion occurred. Though he did not touch the box, electricity arced through the air and entered his body. The current was drawn to his armpits because perspiration is very conductive Thermal Contact Burns Current exited this man at his knees, catching his clothing on fire and burning his upper leg.
- 24. Internal Injuries This worker was shocked by a tool he was holding. The entrance wound and thermal burns from the overheated tool are apparent Same hand a few days later, when massive subcutaneous tissue damage had caused severe swelling (swelling usually peaks 24-72 hours after electrical shock). To relieve pressure which would have damaged nerves and blood vessels, the skin on the arm was cut open
- 25. This worker fell and grabbed a powerline to catch himself. The resulting electric shock mummified his first two fingers, which had to be removed. The acute angle of the wrist was caused by burning of the tendons, which contracted, drawing the hand with them.