The Second World War Sociology Essay

The Second World War Sociology Essay The traditional family, also known as a nuclear family, dominates the society before the World War II. It is a social unit consisting of a pair of married couple in opposite gender and the children they born living together in a single place (Hughes and Fergusson, 2004, p.47). However, a modern family is difficult to be defined because there are diverse forms of family consisting, for example, single parent family and divorced family, they may consisting a pair of couple in same gender or a single parent who had divorced with their partners. Conservatives can be defined as an ideology of that the structure or the form of family should be remain unchanged and conserved (Hughes and Fergusson, 2004, p60); while feminism is a thinking started from the 1960s of equality which against the traditional UK family and the conservatives. Firstly, the gender roles had been change in the recent decades because of the war and had been affect the UK family structure. Before the World War II, men were recognized as the breadwinner and the women should responsible for the house and the children (Hughes and Fergusson, 2004, p.44). The statement shows that the general role of men were to work and were to connect with the external world for supporting the finance of the house and their partners, also they owned the authority for deciding and controlling; while women should stay indoor for serving the needs of husband and the elderly parents, also taking care and rising up children. The turning point is, during the war, men needed to fight in the frontline and left out from their work. Consequently, women needed to bear the workload not only in the military industry for the weapons used in the war but also the general posts in the society, even in the government. This show the gender roles started to be change and an ideology of women can also work and gender equality had been raise up due to this situation, which is an example of feminism. Women started to fight for economic independent and work outside by setting up organizations, for example Government Equalities Offices (2007) which responsible for leading and giving advice for forms of equality including gender equality, and demonstrating, the structure of the UK family had been change, women not only stay indoors but also go to work, not depending on men. Also, the responsibility of taking care children and elderly parents of women can interfere with paid employment and giving financial transfer respectively, (Harper, 2004) this allows more time and less housing burden to women for work, women are not necessary for staying in the house, the value of women responsibility also changed. Secondly, the attitude of marriage had been change, the ideology of marriage is for life changed to late-marrying and divorcing. Office for National Statistic (2010) reported that, the number of marriage in the UK keep decreasing from 1950s, while the number of divorce and lone parents with dependent children in the UK keep increasing (ibid, 2012). In addition, number of co-habitation in UK was increase rapidly from the 1980s. (ibid, 2011) Furthermore, the sexual relation changed in the society, sex outside was now become more acceptable than in the golden age. For example, Births outside marriage become a third of all births by the early 1990s (Halsey, 1995). This illustrates that the attitude to marriage in the UK is not as important and necessary, compared to the golden age. Couples can easily divorce or remarriage and can keep not marrying by co-habitation which all these are affecting the fertility, childcare and child development, also the structure of the family (Harper, 2004) . The thinking of the human right had been raise up: both men and women can divorce if they want and say out their wants, the example of feminism. It is not a must that a family should consist of married couples and children, but the form they want to have. Finally, same-sex couples are recognised from the last decade but it is not a case in the golden age. In 2004 (BBC News), a law about civil partnership had been legislated, it opened the way of same-sex marriage and civil partnership no matter gay or lesbian marriage. Also, there is a first history of two men can be named as parents on a childs birth certificate in April 2010. These politic activities changed the form and the structure of the UK family: it is not a must that parents in a family should be in opposite gender but in a same sex, same-sex couples had been given a chance to get the same right with married couples under the bill. According the report from the Office for National Statistics (2011), although majority of the British think same-sex relationship is always wrong in the 1990s, it totally changed after the bill had been legislated. This shows the ideology of feminism had changed the attitude of marriage: people have the right to choose who they loved with no gender barriers. Furthermore, the welfare, for example education, was provided to both men and women. Before the war, the role of housewife was taken by women because they could not receive education, this limited the chance of women for working outside due to they had no knowledge. According to the report from Office for National Statistics (2008), more men received education in the age of sixteenth to eighteenth than women in 1985. But there was a change, there was the same number of the gender receiving education in 1997 and there are more women enjoy education welfare than men in the recent decades. This shows the change of value and the example of feminism: both men and women can enjoy the welfare provided by the government, and widened the chance of women work outside, which is a cause of changing in the family. However, there is still continuity in the family. Firstly, although women had the independence of their own economy and the right to go for work, men is still the head and has the main authority in the house; women are still responsible to the house works. A national survey done by Harris in 1984 (cited in Halsey, 1995) shows that, half of the adult proportion agreed that The man in the house should be the main breadwinner, and the woman should be mainly responsible for looking after the home and children, even she works. In addition, according to survey done by Office for National Statistic (2011), the proportions of part-time employees of women were significantly higher than the number of the men. These supported that although there is seems a change in the gender role, men are still dominating the house and the main responsibility of women did not change significantly in the UK family, they still emphasis on the house, and the shows the concept of conservatives. Secondly, although there are diverse forms of family consisting in the UK, families are an important institution in society. No matter there are nuclear family; single parent family; or divorced family, and the existence of the family is still important and it is conserved due to the thinking of conservatives. Furthermore, although same-sex couple had been introducing in the family, the role of them are still being not change: maintain the stability in the house and support their life. These have not been change and being conserved. To conclude this essay, the conservatives and feminism are the reason of bringing continuity and changes respectively, these ideology have brought the continuity and changes to the UK family. Families are necessary for ordering the stability of the society no matter the time after the war or as peace as now. Although the nuclear family had been weakened, it still dominates the structure of the family and plays an important role in the society. Changes are necessary and important, but it must change in a natural and slowly way, otherwise it will bring chaos to the society and cannot reach the aim of stabling to UK. The society, on the second hand, should conserve the important thinking and cultural, but could not have absolutely no changes in the society, or the society may not get any improvement. More sentences about this is because of the thinking of feminism (Explanation)

Earth Leakage Circuit Breaker

An Earth Leakage Circuit Breaker (ELCB) (now referred to as residual current circuit breaker) is a safety device used in electrical installations with high earth impedance to prevent shock. History ELCBs were mainly used on TT earthing systems. Nowadays, ELCBs have been mostly replaced by residual-current devices (RCDs). However many ELCBs are still in use. Early ELCBs responded to sine wave fault currents, but not to rectified fault current. Over time, filtering against nuisance trips has also improved. Early ELCBs thus offer a little less safety and higher risk of nuisance trip. The ability to distinguish between a fault condition and non-risk conditions is called discrimination. ELCB manufacturers include: Legrand, Havells, ABB, Siemens AG, Areva T&D, Camsco, Telemecanique, Orion Italia, Crabtree, MEM. [edit] Types There are two types of ELCB: †¢ voltage operated and, †¢ current operated. [edit] Voltage-operated Voltage-operated ELCBs were introduced in the early 20th century, and provided a major advance in safety for mains electrical supplies with inadequate earth impedance. V-ELCBs have been in widespread use since then, and many are still in operation but are no longer installed in new construction. A voltage-operated ELCB detects a rise in potential between the protected interconnected metalwork (equipment frames, conduits, enclosures) and a distant isolated earth reference electrode. They operate at a detected potential of around 50 volts to open a main breaker and isolate the supply from the protected premises. [2] A voltage-operated ELCB has a second terminal for connecting to the remote reference earth connection. The earth circuit is modified when an ELCB is used; the connection to the earth rod is passed through the ELCB by connecting to its two earth terminals. One terminal goes to the installation earth CPC (circuit [[Power system protection |protective]] conductor, aka earth wire), and the other to the earth rod (or sometimes other type of earth connection). Disadvantages of the voltage-operated ELCB are the requirement for a second connection, and the possibility that any additional connection to earth on the protected system can disable the detector. edit] Current-operated Current-operated ELCBs are generally known as Residual-current devices (RCD). These also protect against earth leakage. Both circuit conductors (supply and return) are run through a sensing coil; any imbalance of the currents means the magnetic field does not perfectly cancel. The device detects the imbalance and trips the contact. When the term ELCB is used it usually means a voltage-operated device. Similar devices that are current operated are called residual-current devices. However, some companies use the term ELCB to distinguish high sensitivity current operated 3 phase devices that trip in the milliamp range from traditional 3 phase ground fault devices that operate at much higher currents (traditional gf devices are insensitive due to the error inherently associated with the summation of currents from multiple current transformers). [edit] Connection [edit] Operation An ELCB is a specialised type of latching relay that has a building's incoming mains power connected through its switching contacts so that the ELCB disconnects the power in an earth leakage (unsafe) condition. The ELCB detects fault currents from live to the earth (ground) wire within the installation it protects. If sufficient voltage appears across the ELCB's sense coil, it will switch off the power, and remain off until manually reset. A voltage-sensing ELCB does not sense fault currents from live to any other earthed body. [edit] Advantages ELCBs have one advantage over RCDs: they are less sensitive to fault conditions, and therefore have fewer nuisance trips. (This does not mean they always do, as practical performance depends on installation details and the discrimination enhancing filtering in the ELCB. Therefore by electrically separating cable armour from cable CPC, an ELCB can be arranged to protect against cable damage only, and not trip on faults in downline installations. [edit] Disadvantages ELCBs have some disadvantages: †¢ They do not detect faults that don't pass current through the CPC to the earth rod. †¢ They do not allow a single building system to be easily split into multiple sections with independent fault protection, because earthing systems are usually bonded to pipework. They may be tripped by external voltages from something connected to the earthing system such as metal pipes, a TN-S earth or a TN-C-S combined neutral and earth. †¢ As with RCDs, electrically leaky appliances such as some water heaters, washing machines and cookers may cause the ELCB to trip. †¢ ELCBs introduce additional resistance and an additional point of failure into the earthing system. [edit] Earth bypassing It is not unusual for ELCB protected installation to have a second unintentional connection to earth somewhere, one that does not pass through the ELCB sense coil. This can occur via metal pipework in contact with the ground, metal structural framework, outdoor home appliances in contact with soil, and so on. When this occurs, fault current may pass to earth without being sensed by the ELCB. Despite this, perhaps counterintuitively, the operation of the ELCB is not compromised. The purpose of the ELCB is to prevent earthed metalwork rising to a dangerous voltage during fault conditions, and the ELCB continues to do this just the same, the ELCB will still cut the power at the same CPC voltage level. (The difference is that higher fault current is then needed to reach this voltage. ) [edit] Nuisance trips While voltage and current on the earth line is usually fault current from a live wire, this is not always the case, thus there are situations in which an ELCB can nuisance trip. When an installation has two connections to earth, a nearby high current lightning strike will cause a voltage gradient in the soil, presenting the ELCB sense coil with enough voltage to cause it to trip. If the installation's earth rod is placed close to the earth rod of a neighbouring building, a high earth leakage current in the other building can raise the local ground potential and cause a voltage difference across the two earths, again tripping the ELCB. Close earth rods are unsuitable for ELCB use for this reason, but in real life such installations are sometimes encountered. Both RCDs and ELCBs are prone to nuisance trips from normal harmless earth leakage to some degree. On one hand ELCBs are on average older, and hence tend to have less well developed filtering against nuisance trips, and on the other hand ELCBs are inherently immune to some of the causes of false trips RCDs suffer, and are generally less sensitive than RCDs. In practice RCD nuisance trips are much more common. Another cause of nuisance tripping is due to accumulated or burden currents caused by items with lowered insulation resistance. This may occur due to older equipment, or equipment with heating elements, or even wiring in buildings in the tropics where prolonged damp and rain conditions can cause the insulation resistance to lower due to moisture tracking. If there is a 30 mA protective device in use and there is a 10mA burden from various sources then the unit will trip at 20 mA. The individual items may each be electrically safe but a large number of small burden currents accumulates and reduces the tripping level. This was more a problem in past installations where multiple circuits were protected by a single ELCB. Heating elements of the tubular form are filled with a very fine powder that can absorb moisture if the element has not be used for some time. In the tropics, this may occur, for example if a clothes drier has not been used for a year or a large water boiler used for coffee etc. has been in storage. In such cases, if the unit is allowed to power up without RCD protection then it will normally dry out and successfully pass inspection. This type of problem can be seen even with brand new equipment. edit] Failure to respond Some ELCBs do not respond to rectified fault current. This issue is the same in principle with ELCBs and RCDs, but ELCBs are on average much older and specs have improved considerably over the years, so an old ELCB is more likely to have some uncommon fault current waveform that it will not respond to. With any mechanical device, failures occur, and ELCBs should ide ally be tested periodically to ensure they still work. If either of the earth wires become disconnected from the ELCB, it will no longer trip and the installation will often no longer be properly earthed

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