Hot wires are black or red, and neutral wires are white or light gray. For safety, all modern circuits include a bare copper or green insulated grounding wire. The grounding wire conducts current in the event of a ground fault and helps reduce the chance of severe electrical shock.The service panel also has a bonding wire connected to a metal water pipe and a grounding wire connected to a metal grounding rod, buried underground, or to another type of grounding electrode.
Electric circuits of lightingIf a circuit carries too much current, it can overload. A fuse or a circuit breaker protects each circuit in case of overloads.
Basic Electrical Book Pdf In Tamil; Electrical Books In Tamil Pdf; Electrical Book In Tamil Pdf; Basic House Wiring Book Tamil Pdf; Electrical Wiring Pdf In Tamil Books; Entity Relationship Diagram Symbols House Wiring Books In Tamil; Tamil Electrical Book Download; Electrical Tamil Books; Basic Electrical In Tamil Language. Free Tamil books online for download. Large collection of popular Tamil PDF eBooks and ePub Tamil eBooks. Topics include Tamil literature, stories, Siddha and health from famous authors.
Current returns to the service panel along a neutral circuit wire. Current then leaves the house on a large neutral service wire that returns it to the utility transformer.Grounding and PolarizationElectricity always seeks t o return to its source and complete a continuous circuit. Contrary to popular belief, electricity will take all available return paths to its source, not just the path of lowest resistance.In a household wiring system, this return path is provided by white neutral wires that return current to the main service panel. From the service panel, current returns along the uninsulated neutral service wire to a power pole transformer.You will see the terms used in this and other books about electricity. These terms are often misunderstood. You should understand the difference to safely work on electrical circuits. LEFT: Normal current flow – Current enters the electrical box along a black hot wire and then returns to the service panel along a white neutral wire.
RIGHT: Current is detoured by a loose wire in contact with the metal box. The grounding wire and bonded metal conduit pick it up and channel it back to the main service panel, where the overcurrent device is tripped, stopping further flow of current. Most current in the bonding and ground system flows back to the transformer; some may trickle out through the copper that leads to the grounding node.Bonding connects the non-current-carrying metal parts of the electrical system, such as metal boxes and metal conduit, in a continuous low-resistance path back to the main service panel. If this metal becomes energized (a ground fault), current travels on the bonded metal and quickly increases to an amount that trips the circuit breaker or blows the fuse.The dead circuit alerts people to a problem.
IndiaMART Member Since Jun 2014JKP Publications was established in 2003, to cater to the needs of the ITI trainees appearing for All India Trade Test examinations. With a view to make them confident our experienced teachers Mr. Xavier, B.E., and Mr. Radhakrishnan, D.E.E.E., have meticulously gone into all aspects of the syllabus and prepared ITI text books for various trades covering syllabus for Craftsman Training Scheme (CTS) under NCVT. Their expertise is visible in every page of our books from cover to cover.Our books are well illustrated by CAD and easily understandable. Packed with variety of objective type questions our books cover all possible types of questions that can be expected in the examinations, thus acquainting the trainees with the type of questions they are likely to face in the examinations. The aim of our books is to provide an exhaustive practice for the trainees to take up the All India Trade Test under NCVT with confidence and succeed.We assure you that we will continue to strive hard to improve the quality and standard of our books periodically, to meet the challenges of changing trend.
Any suggestion to improve the quality of our books is welcome.