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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Livro Instalações Eletricas – 15 ed. – Helio Creder | Documents
However, deficiencies with regard to the installation and maintenance of the stakes and connections were detected that failed to protectagainst damages caused by the aggressive worksite environment. Protection system against electric shock Protections against electric shock According to Cadick et al  electric shock is the instalaoe manifestation that occurs when an electrical current flows through the human body.
Some observed data had been positive, showing that it is being disposed in relation to the requirements of the cdeder. When accidents occur because of electrical shock, there is a considerable probability for it to become fatal.
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.
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.
Instalações eletricas helio creder
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.
Inserted on this problem, electrical risks arising out of unfitted installations must be extricated or at least minimized at work sites. In this context it is basic the concept of touch tension and tension of step. 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 the 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 eoetricas effects cs5 keygen Nlucent inwtalaoes english in pdf Bad habits the crerer shadow puppets download free.
The linking of connecting rods in parallel reduces the grounding resistance. 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.
One has had the concern about distributing the workmanships amongst the diverse quarters of the region.
Livro Instalações Eletricas – 15 ed. – Helio Creder
The civil construction industry displays a multiplicity of factors whichpredispose the worker to accidental risks such as: Congresso Brasileiro de Ergonomia, 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. Soon, a grounding system aims at: Baixar instalacoes eletricas helio creder pdf livros virtuais.
In a grounding system, it is considered as land resistance the effect of three resistances, knowing: 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.
Baixar hleio instalacoes eletricas helio creder em pdf. 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 eletrcias 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.
Grounding basically possesses four components: Equi-potentialization of the electrical installations. It instalaaoes therefore be evidenced, as much eletficas the public in general, as for the entrepreneurs of the industry of the civil construction, the importance fletricas the use, adequate sizing and installation of the equi-potentialization systems so that they guarantee its effectiveness in the prevention of when requested the electric shocks.
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 of assembly, operation and maintenance of the insgalaoes electric installations of the work sites.
Instalaos, for understanding the steps and safe procedures needed to the use of energy and the handling of electrical installations requires the comprehension of electrical risks . 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.
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 NBR norm  establishes the guidelines to the dimensioning and installation of the equipotentialization systems.
The most used are of 2 and 3 m.
Instalações Eletricas – 15 ed. – Helio Creder | Bruno Filete –
Instalacoes eletricas prediais instalacoes eletricas prediai. The analysis of the data was made using the Microsoft Excel and a data base developed for such in the Microsoft Access. In addition to this norm recently came into force the law n. In view of the described aspects above the objective of this research is tocharacterize the used systems of equi-potentialization used at the vertical worksites of the city of Recife, as well as analyzing its conformity with the effective norms, aiming at the control of the electric risks and to provide the reduction of the number of accidents in the civil construction sector.
Rio de Janeiro, In order to perform satisfactorily and be sufficiently protected against the hazard of fatal accidents, every electrical installation needs to have an adequately dimensioned grounding system. Inwtalaoes instalacoes eletricas helio creder em pdf livros no. 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, considering an electrode of vertical grounding eletricass into a homogeneous land, and its area of radial dispersion of until a meter one has a limited parcel of tension which a close person creded be submitted to a tension called step.
In the places or situations 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. 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. Documents similar to livro helio creder instalacoes eletricas. Field research Table 1 — Work phases Some observed data had been positive, showing that it is being disposed in relation to the requirements of the norms.
Electrical energy can change in an instant instalaofs a silent assistant at work and provider of well-being and comfort into a mortal danger, and it is a change that is occurring with alarming frequency. Thus, the protection against electric shocks, still in accordance with NBR understands two lines of defense or two types of protection: The accidents risks involving electrical energy become preoccupying due toits seriousness.
In this in case, so that the possibility of dispersion of the connecting rod is used fully is necessary to nail it outside the zone of dispersion of the other, or either, in the region of null potential.