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You should know that
Electricity is the set of physical phenomena associated with the presence and flow of electric charge. Electricity gives a wide variety of well-known effects, such as lightning, static electricity, electromagnetic induction and electric current. In addition, electricity permits the creation and reception of electromagnetic radiation such as radio waves.
In electricity, charges produce electromagnetic fields which act on other charges.
Electricity occurs due to several types of physics:
electric charge: a property of some subatomic particles, which determines their electromagnetic interactions.
Electrically charged matter is influenced by, and produces, electromagnetic fields, electric charges can be positive or negative.
electric field (see electrostatics): charges are surrounded by an electric field.
The electric field produces a force on other charges.
Changes in the electric field travel at the speed of light.
electric potential: the capacity of an electric field to do work on an electric charge, typically measured in volts.
electric current: a movement or flow of electrically charged particles, typically measured in amperes.
electromagnets: Moving charges produce a magnetic field.
Electric currents generate magnetic fields, and changing magnetic fields generate electric currents.Źródło: https://en.wikipedia.org/wiki/Electricity
Are electrical faults are inevitable?
Actually, modern technological solutions in the design and construction of electrical installations, make electrical services are becoming less necessary.
Excellent insulation of cables and their arrangement can make the most electrical work will be the installation of such electrical lines, not during their operation.
Does this mean that in the future, avoid any electrical failures? The answer to this question is simple and of course negative, because although more and better solutions are continuously implemented many failures simply impossible to predict, even using the most modern electrical installations.
Electricity and safetyOccupation electrician is very often seen as a profession in which extremely common ones are physical injury.
This is related primarily to the fact that when working with electricity, even the smallest mistake can cause severe short circuit, which would be harmful to human health.
Usually created a power failure is unexpected and electrician seeking a solution to the problem moves groping.
Therefore, for such a mistake it is very easy and you can tell that no theoretical knowledge is not able to prepare the employee to perfect the profession, because of some random events can not be predicted..