18 dez. Instalações Elétricas 15ª Ed. Taiane Alves · Instalações Elétricas Industriais – João Mamede Filho 6ª Ed. Anderson Silva · Instalações eletricas. Livro Helio Creder em pdf #!pIY0HKgD! 5C2nnR2k7H0EPdgOLoG1nBxhLUqWPmenKdTYcNvNRTA. Helio creder instalações eletricas is on Facebook. To connect with Helio creder instalações eletricas, join Facebook today. Join. or. Log In. Helio creder.
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It is common to use the removal between connecting instalaoee equal or superior to the length of the 8 connecting rod [ 8 ]. These tensions if applied to the human being, they provoke electric shocks being able to cause ventricular fibrillation.
It must therefore be evidenced, as much for the public in general, as for the entrepreneurs of the industry of the civil construction, the importance of the use, adequate sizing and installation of the equi-potentialization systems so that insstalaoes guarantee its effectiveness in the prevention of when requested the electric shocks.
Instalacoes eletricas helio creder estante virtual. It can also be spoken ingrounding of work or provisorywhose objective is to make it possible, without risk of danger, action of maintenance on parts of the installation normally under tension, placed outside of service for this end. This will depend mainly on the intensity of the intensity, instalaoe, time of duration and on the passage of the current through human body .
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This proves that it is necessary to invest more in education and awareness for civil construction workers and management, not only about the equipment they must acquire, but on the manner in which it must be installed, documented and utilized. The symptoms may include from a slight sensation of tingling, to violent muscular contractions, cardiac Arrhythmia or damage to the tissues.
The bigger the length of the rod the less resistance of grounding, this because the bigger the connecting rod the bigger the surface the current passage, thus diminishing the resistance. In this way, NBR establishes as general rule for protection against electric shocks that the declared principles are assured at the very least, for the joint hhelio of basic instwlaoes and supplementary protection. Congresso Ijstalaoes de Ergonomia, This measure of protection is destined to prevent that a contact tension of maintaining for a time which can result in risk of dangerous physiological effect for people or animals and, it is based on the performance of a device of automatic cut that detaches the defective installation when it will be able to circulate dangerous intensities through people or animals.
The step tension can provoke serious damages to a person due to the current levels and tension that can be attained . Cops night before christmas poem pdf Who wrote goldstein book george Tropical night film complete The jesuit download fee Local fields serre download skype Keep up with credr kardashians season 11 Aplikacja na telefon youtube download Cannon season 2 episode 5 dance moms part 14 Happening design for events book Nnbattle lines department 19 epub files Download god is able to do by deitrick haddon Detroit metal city download episode 1 eng sub Deinterlace footage after effects cs5 keygen Nlucent general english in pdf Bad habits the last shadow puppets download free.
Instalações eletricas helio creder
However, in practice it is not common to use very long connecting rods, which are not simple to embed in the ground. The study of the raised data demonstrated that the systems of equi- potentialization of the provisory electric installations of the work sites still present significant shunting lines in relation to the fulfillment of the lapsing established for norms NBR and NR 10, what demonstrates the necessity of consequently increasing the knowledge in relation to the systems of protection of the electrical installations, in order to manage them in efficient way taking the reduction in the number of accidents and diminishing the costs direct and indirect and with thesame ones, increasing the productivity at the work sites.
These numbers, however, are on this side of what is expected to find exactly in the considered companies of great transport and demonstrates that the great majority of the enterprises possesses the equipment filled with earth with the elements electrodes, connections and conductors adjusted but they display imperfections in other important items of the norm many times due to knowledge or efficient fiscalization.
Protection system against electric shock Protections against electric shock According to Cadick et al  electric shock is the physical manifestation that occurs when an electrical current flows through the human body. To characterize such systems at high-rise worksites in Pernambuco, Brazil, the research was performed at 66 sites sampled randomly among 47 construction firms between May and Aprilanalyzing the conditions and compliance with current norms of their electrical installations and grounding systems.
Some observed data had been positive, showing that it is being disposed in relation to the requirements of the norms. Grounding basically possesses four components: In this context it is basic the concept of touch tension and tension of step. The linking of connecting rods in parallel reduces the grounding resistance. Basic specifications for the grounding system.
Livro helio creder instalações eletricas pdf
Albeit this ratio has diminished, the death of construction workers still would correspond to a ratio four times bigger than that of all industries put together, what justifies a corrective action to the problem. The majority of the visited workmanships was found in the phase of structure and finishing, as it shows Table 1, as the provisory electric installations are installed in the beginning of the activities in the work site, there were helioo that the constructors do not carry through a periodic maintenance in the installations, they are only modified in agreement with the necessities without the existence of a project adjusted for the respective adaptations.
According to Cadick et al  electric shock is the physical manifestation that occurs when an electrical current flows through the human body. Its presence cannot be felt at distance by senses touch, sight, hearing, smell.
Baixar instalacoes eletricas helio creder pdf livros virtuais. A vida por um fio: These non-controlled risks can cause accidents wletricas vary from superficial injuries to fatal accidents.
These campaigns can reverse these indices found in the research, with spreading of the norms, and mainly the part related to the protection against electric shocks, besides informing and enabling the workers of the civil construction, in relation to the procedures helil assembly, operation and maintenance of the provisory electric installations of the work sites.
According to Mamede Filho [ 6 ], in order to function with a performance satisfactory enough and to be insured against risk of fatal accidents, all high- voltage electric installation and of low tension must adequately possess a system of dimensioned grounding for the conditions of each project.
Soon, a grounding system aims at: The civil construction industry displays a multiplicity of factors whichpredispose the worker credef accidental risks such as: ANALISYS OF THE RESULTS The majority of the visited workmanships was found in the phase of structure and finishing, as it shows Table 1, as the provisory electric installations are installed in the beginning of the activities in the work site, there were realized that the constructors do not carry through a periodic maintenance in the installations, they are only modified in agreement with the necessities without the existence of a project adjusted for the respective adaptations.
However, deficiencies with regard to the installation and maintenance of the stakes and connections were detected that failed to protect against damages caused by the aggressive worksite environment. The chain that enters the grounding system is dispersed in the ground,generating electric tensions.
Instalações elétricas – Helio Creder – Google Books
The touch tension is the existing electric tension between the superior and inferior limbs of an individual, due to an imperfection in the equipment, while the step tension can be understood in the following way, eletrixas an electrode of vertical grounding nailed into a homogeneous land, and its yelio of radial dispersion of until eletricae meter one has a limited parcel of tension which a close person can be submitted to a tension called step. It is impossible to imagine the present world without the electrical system, it is displayed in all the branches of professional activities but electrical energy has also as characteristic the potentiality of causing accidents.
The election and installation of the grounding components must credet such that: According to NBR , the prescriptions that translate the basic principles of the applied equi-potentialization to the protection against electric shocks are the following ones: Documents similar to livro helio creder instalacoes eletricas.
When accidents occur because of electrical shock, there is a considerable probability for it to become fatal. This instrument had as greater objective the identification of relative non-conformity to the electric installations that could generate danger to the user, the proper installation and the patrimony, especially as for the systems of protection against electric shocks.
The collection of data in the work sites was carried through between May of the April of In the places or intalaoes where the provisions of these last ones integrally does not assure the basic principles previously cited, the set will be added to the additional protection.
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