Since early 2003 the Electrical Inspectorate has been working to raise public awareness of Residual Current Devices (RCDs), with the aim of eventually enforcing the use of these devices as recommended by the standard adopted by the St. Lucia Bureau of Standards for wiring of buildings SLNS/BS 7671: 2001- Requirements for Electrical Installations ¡V IEE Wiring Regulations ¡V Sixteenth Edition. These Regulations though only recently adopted by the Bureau of Standards is the Regulations referred to by the St. Lucia Electricity regulations of 1973 as the standard of wiring of buildings. For a very long time the cost of these devices had proven prohibitive for the enforcement of the requirement. However, it is now believed that safety concerns as it relates to electrical hazards such as fire and electrocution far outweigh the cost of these devices
What is an RCD?
An RCD is an electrical safety device specially designed to save life from Electrocution by immediately switching the electricity off when electricity ¡§Leaking ¡¨ to earth is detected at a level that maybe harmful to a person using electrical equipment.
How Electricity Kills
Electrocution occurs when a small, specific amount of electrical current flows through the heart for 1 to 3 seconds. 0.006-0.2 Amps (i.e. 6-200 milliamps) of current flowing through the heart disrupts the normal coordination of heart muscles. These muscles lose their vital rhythm and begin a process known as ventricular fibrillation. Death soon follows.
0.25 Amps/250mA is equal to the current flowing through a 60W Bulb.
What is ventricular fibrillation?
The heart beats when electrical signals move through it. Ventricular fibrillation is a condition in which the heart's electrical activity becomes disordered. When this happens, the heart's lower (pumping) chambers contract in a rapid, unsynchronized way. (The ventricles "flutter" rather than beat.) The heart pumps little or no blood therefore the probability of death is high.
What is the advantage of RCDs over Breakers and Fuses?
Fuses or over current circuit breakers protect wires from damage not human beings and lifestock. On the other hand RCD with a maximum tripping current of 30mA provide protection from electrical shock.
Circuit breakers and fuses provide equipment and installation protection and operate only in response to an electrical overload or short circuit. Hence these devices cannot detect earth fault currents below their operating current. If they are the only means of protection, it is possible for sufficient earth fault current to flow undetected to constitute an electrical hazard (fire and electrocution).
In this lab, I took two recordings of my heart using an electrocardiogram. An electrocardiogram, EKG pg. 628 Y and pg. 688 D, is a recording of the heart's electrical impulses, action potentials, going through the heart. The different phases of the EKG are referred to as waves; the P wave, QRS Complex, and the T wave. These waves each signify the different things that are occurring in the heart. For example, the P wave occurs when the sinoatrial (SA) node, aka the pacemaker, fires an action potential. This causes the atria, which is currently full of blood, to depolarize and to contract, aka atrial systole. The signal travels from the SA node to the atrioventricular (AV) node during the P-Q segment of the EKG. The AV node purposefully delays
When a person has Atrial Fibrillation, the sinoatrial node releases multiple quick impulses at a rate of 350 -600 times per minute. When this happens, the ventricles respond by beating around 120- 200 beats per minute, making it tough to identify an accurate heart rate. This arrhythmia can be the result of various things. During a normal heart beat, the electrical impulse begins at the sinoatrial node and travels down the conduction pathway until the ventricles contract. Once that happens, the SA node fires again and the process keeps on cycling (Ignatavicius & Workman, 2013).
During their rule as national leaders both Adolf Hitler and Joseph Stalin were responsible for killing millions of innocent people. Hitler alone was responsible for death of more than 5 million, and Stalin was responsible for over 13 million people to be killed. However, the deaths caused by Hitler would be classified as murder, while the deaths caused by Stalin would be classified as an execution. During Stalin’s rule he did cause many innocents to be executed because he thought they were guilty of crimes against the state. He
Vladimir Lenin and Joseph Stalin were similar in what they claimed to be, but in actuality they were very different people. Although Stalin claimed that he followed Leninism, the philosophy that Lenin developed from Marxism, he often distorted it to follow what he wanted to do. While Lenin wanted to make a unified society without classes, with production in the hands of the people, while Stalin wanted to make Russia into a modern industrial powerhouse by using the government to control production. Lenin accomplished his goals through violence, because he thought achieving Communist revolution was worth using violence, with a ‘The ends justify the means’ mentality. Stalin also used violence to accomplish his goals, however Stalin used much more violence than was often necessary to accomplish his goals. Stalin continued even once he was successful in accomplishing those goals, as he did not stop hurting people, but if anything it gave him more power to hurt people even more. But, at the end of the day, although Lenin ruled for only a very short time, he did raise the standard of living, though there maintained a large amount of hardship. Stalin, however, transformed the USSR from a peasantry to an industrialized nation in less than a decade, he did it on the backs of his millions of victims, who died because of his harsh policies and many purges.
"Incidence of Concussion in High School Football Players of Ohio and Pennsylvania." Journal of Child Neurology. Web. 28 Sept. 2011. .
These two men were very demanding in obtaining what they thought should be the rule of a nation by their own personal control. Stalin and Hitler were very close in the same way that they had an aggressive vigor to force a type of commanding dictatorship into their respective countries. Each had a special army that they put in high regard politically to where they were considered special police agents. These armies were under different orders, but their main objectives were to stop anyone who opposed, or were thought to be in opposition to the head of state. Also, both Stalin and Hitler had ideas to improve the education levels and economic prosperity of their own countries, each trying to put their own at the top of the world in industry and commerce. Although Hitler and Stalin were opposed to each other’s own strategies and political stance on being a world dominator, they were very similar in the way to which they fought for political power.
On August 14th, 2003, a major blackout swept across portions of the northeastern United States and Canada. It was reported that a series of equipment outages in the Midwest led to uncontrolled cascading outages of power transmission lines and generators serving parts of the Northeast, Midwest and Canada. Automatic protective systems operated to open circuits and shut down power plants to prevent further spread of the outages. This is very similar to what happened in The Great Northeast Blackout of 1965. In both situations, the “grid system” shut down one generator in line at a time to protect a surge from the station before it.
This type of execution was invented by employees of Thomas Edison during the War of the Currents that occurred in the US. It was designed by inventor and steamboat engineer, Dr. Alfred P. Southwick and built by Harold P. Brown who was an electrical engineer. The process of execution involves the convict being strapped down to a chair with leather belts before being electrocuted by a minimum of two jolts of electricity about 500 - 2000V that lasted about 30 seconds each. A public demonstration was held to determine the type of current to be used. Direct current (DC) was chosen instead of alternating current (AC) as direct current does not instantly kill the convict.
Confusion on the definition of a concussion can affect athletes, coaches and trainers when it comes to diagnosing a concussion. The knowledge to know the signs and symptoms of a concussion can reduce the short, medium, and long-term consequences of them. Signs of a concussion could be an inability to focus, vomiting, nausea, dizziness, and slurred speech. Concussions have been around for many years. More and more research is being conduction on concussions as the years pass for a better understanding. As a better understanding of concussion is being researched, sports teams should force and make better rules when it comes to hitting players. Athletes that has had a concussion can suffer from short-term symptoms like verbal delay or long-term symptoms like a disability. Helmets are being improved constantly, but the reduction of concussions is not decreasing. Reduction of concussion starts with the player reporting his injury. After reporting the injury, the proper steps can be taken to get rid of symptoms and prevent the likeliness of the injury from happening again. To prevent to the likeliness of the injury to reoccur the athlete must take time away from the sport and spend a certain amount of time recovery. Before returning back to play, the athlete must be check for readiness. Readiness can be checked by testing the athlete’s behavior and abilities. Sports come with pros and cons. The pros can be working with others to complete the same objective while having fun. The con can be simply suffering from a concussion. So an athlete has to be willing and well educated on the sport he or she wants to play before committing to a certain
Adolf Hitler was born in 1889 on the border between Austria and Germany. His father, Alois Schickelgruber Hitler, was a customs official and his mother, Klara Poelzl, a peasant girl. As a child, Hitler appeared to posses no striking qualities and indeed lived quite an unremarkable life until his moving to Munich in 1913. The life of Joseph Stalin begun not too dissimilarly, born in the Russian province of Georgia, in 1879 unto his mother Yekaterina, and her husband Vissarion Djugashvili, his childhood too, was difficult and at the age of nine he was enrolled in the elementary clerical school in Gori.
It happens all too often, athletes are coming home complaining of dizziness, confusion, and a headache. “More than 1.6 million Americans suffer a sports-related concussion every year, and a growing number occur among high school and college athletes” (O’connor).
In recent years, concussions have taken over the spotlight for sport injuries. It wasn’t long ago that doctors ignored these head injuries and let the players go right back onto the field. Joe DeLamielleure an offensive lineman for the Buffalo bill and Cleveland Browns explained when he played football in the 1970’s he received thousands of blows to the head and believes he has had at least 100 concussions (ESPN). Because the brain is very complex every brain injury is different. Some concussions cause people to lose conciseness while
Both Stalin and Hitler were dictators of a country that they were not originally from (Stalin was from Georgia and ruled over Russia and Hitler was from Austria and ruled over Germany). Both attempted to start their own nations, restore power so they could control people in which their political party was the only one allowed to assist the government, and denied rights to the individual.
?Automation Reduces Weld Spatter? Welding Design & Fabrication (Jun. 2001): 37 EBSCOhost. Online. Nov. 2002 .
It’s subjective opinion or psychology of customers. Satisfaction is often confused with loyalty. The range of customer’s emotion is shown with surprise, contentment, happy, unhappy or relief. The entire gap between perceived quality and expected quality is influenced customer satisfaction. Customer loyalty is always is frequency buying action.