• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Electrical Hazards.

Extracts from this document...

Introduction

Electrical Hazards, risks of injury or death arising from exposure to electricity. Electricity is essential to daily life, providing heat and light and powering appliances in homes and factories. It must, however, be treated with great care, because the consequences of an electrical fault can be serious and sometimes fatal. Generally voltages greater than 50 volts can present a serious hazard and currents of more than about 50 milliamps flowing through the human body can lead to death by electrocution. A shock occurs when a "live" part of some device is touched, so that current passes through the body. Its severity depends on many factors, including the body's conductivity (the ease with which electricity passes through it). The conductivity is usually small, but can be increased if the body or clothing is wet. ...read more.

Middle

Most were males between 15 and 64 years of age, carrying out do-it-yourself and maintenance work. Several deaths were caused by people touching the live end of a cable cut by an electric lawnmower. Electrical faults in the home cause around 25,000 fires each year, killing or injuring over 2,000 people. Electrical Installations Most countries have detailed regulations governing the standards to which electrical installations must conform. In the United Kingdom the Wiring Regulations (BS 7671), produced by the Institution of Electrical Engineers (IEE) and the British Standards Institution (BSI), prescribe the wiring standards to be adopted. The Electrical Contractors Association (ECA) and the National Inspection Council for Electrical Installation Contracting (NICEIC) require their members to observe these requirements to minimize any danger. Electrical Products In Britain, domestic electrical products must satisfy the requirements of the Electrical Equipment (Safety) ...read more.

Conclusion

Electrical wiring should be inspected every five years by experts, such as those recognized by the ECA and the NICEIC. Children must be warned to keep away from railways, electricity sub-stations, and factories, and fishing-rods, especially those made of carbon fibre, and kites must not be used near overhead power lines. Anyone using electrical equipment out of doors should ensure that the supply is protected by an RCD (residual current device), which detects any current to earth and so will protect the user against the danger of serious electric shock by disconnecting the supply in the event of a fault occurring. In the home, fuses, which are a rather crude method of protecting the distribution system against excessive current, have largely been replaced by the more precise MCB (miniature circuit-breaker), and RCDs are now usually incorporated to provide added safety from the danger of electric shock. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Electrical & Thermal Physics section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Here's what a star student thought of this essay

4 star(s)

Response to the question

The candidate gives a thorough response to the set topic and clearly describes the different types of electrical hazards including how a person receives an electrical shock. The information provided is interesting to read and informative.

Read full review

Response to the question

The candidate gives a thorough response to the set topic and clearly describes the different types of electrical hazards including how a person receives an electrical shock. The information provided is interesting to read and informative.

Level of analysis

The candidate clearly uses appropriate technical terms and always defines a new term, which shows a good understanding of electricity and electrical faults and makes the essay easier to read. The information provided shows a good level of detail and the candidate seems to have undergone independent research as they have included statistical figures relating to electrical accidents and they have clearly stated the regulations involved in electrical insulation. This is a nice touch, its helps illustrate their points and shows dedication and interest in the subject. However if you plan to this it is essential to write a short bibliography stating the sources you have used. Furthermore the essay comes to an abrupt end, without a conclusion. A good conclusion is important, it helps draw the essay to a close, it also allows you to summarise all of your key points and include personal opinions so that you can leave the reader with a good impression.

Quality of writing

The layout of this piece of writing is slightly unclear, there are no spaces between paragraphs and headings which is a little bit confusing. You should make your that you work is laid out in clear and coherent manner. That said, the candidate uses technical terms correctly, there are no spelling issues and appropriate grammar is used throughout.


Did you find this review helpful? Join our team of reviewers and help other students learn

Reviewed by pictureperfect 02/07/2012

Read less
Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Electrical & Thermal Physics essays

  1. Physics - How Electric Eels Generate and Use Electricity.

    The resting voltage is usually about 0.085 volts, as this isn't very high but its uniformly spread around the outside of each cell, this makes all the outside of the cells positively charged and the inside negatively charged. By having this arrangement they can generate heaps of amount voltage.

  2. The aim of my investigation is to determine the specific heat capacity of aluminium.

    I also noticed that the temperature increased by 4 C once the power pack was switched off. The heat is therefore not being transferred from the aluminium block to the thermometer efficiently and quickly. To overcome this I will place oil in the hole surrounding the thermometer as the oil

  1. Measuring The Resistivity Of A Pencil Lead.

    One safety issue to take care of is the current through the circuit, if this current is too high the wooden encasing the pencil lead could ignite and cause a fire hazard. The other safety issue to consider is when cutting open the pencil to measure the lead's diameter.

  2. I am going to investigate what the resistivity is of a pencil lead. ...

    This is because there is more area for the current to pass through at one time. Pencil leads come in different hardness's so I will have to keep the hardness of the pencil lead the same. To do this I will use the same piece of lead throughout the experiment.

  1. Characteristics of Ohmic and Non Ohmic Conductors.

    The amplitude of the vibrations of the atoms increases and more 'collisions' with atoms are caused by the electrons. Therefore the resistance increases with temperature. This means that it is no longer an Ohmic conductor. The graph that is drawn from taking the reading of current and voltage in a

  2. Heating Effect of a Electrical Current

    So the less water, the temperature will increase more and vice versa. Therefore water is a factor for temperature change so must be kept constant for a fair test. Why time should be kept constant: This is because if there is more time for the heater to convert the electrical energy to heat energy, the water will heat up more.

  1. The aim of the experiment is to verify the maximum power theorem and investigate ...

    The next assumption is that the friction is evenly distributed over the whole sand paper. If we do not assume that, the frictional force acted on the blocks will be different all the times. The coefficient of the static and kinetic friction will also be different over the whole sand paper.

  2. The objective of this laboratory was to measure the specific heat capacity of two ...

    - The heat transfer between the metal and the water in the calorimeter is through conduction because the heat was flowing directly through the metal into the water. Conduction is the transfer of thermal energy between two regions of matter due to a temperature gradient.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work