A Practical Guide to the Testing of Insulated Wires and Cables PDF Download
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Author: Herbert Laws Webb
Publisher:
ISBN:
Category : Electric testing
Languages : en
Pages : 134
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Book Description
Author: Herbert Laws Webb
Publisher:
ISBN:
Category : Electric testing
Languages : en
Pages : 134
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Book Description
Author: Herbert Laws Webb
Publisher: Forgotten Books
ISBN: 9780282524609
Category : Technology & Engineering
Languages : en
Pages : 126
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Book Description
Excerpt from A Practical Guide to the Testing of Insulated Wires and Cables The main idea running through this little work is to present in clear and practical form the ordinary every-day work of the testing-room, in other words, the rudiments of wire and cable testing, with a view to furnishing to the workers in the great fields of telephony, telegraphy, elec tric lighting and electric railroading a concise guide to the manipulation of a set of testing instruments. It goes without saying that references have been occa sionally made to the standard work on this subject, Kempe's Handbook of Electrical Testing; and the same writer's Electrical Engineer's Pocket-book, has also, from time to time been referred to. The author's acknowledgments are due to Mr. E. H. Lyon for assistance in the preparation of the original diagrams, which materially help to explain the text. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: William Swan Sonnenschein
Publisher:
ISBN:
Category : Best books
Languages : en
Pages : 880
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Book Description
Author: Herbert Laws Webb
Publisher:
ISBN:
Category : Electric wire, Insulated
Languages : en
Pages : 118
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Book Description
Author: William Swan Sonnenschein
Publisher:
ISBN:
Category : Best books
Languages : en
Pages : 876
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Book Description
Author: Bishopsgate Institute, London
Publisher:
ISBN:
Category : Dictionary catalogs
Languages : en
Pages : 662
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Book Description
Author: Herbert Laws Webb
Publisher: Theclassics.Us
ISBN: 9781230256214
Category :
Languages : en
Pages : 24
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Book Description
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1891 edition. Excerpt: ...cable-testing are scarcely applicable to every-day work, but should always be applied when testing cables at a factory for acceptance or rejection, as the various points enumerated above throw considerable light on the specific quality of the dielectric and its prospective durability. It is not to be imagined that an relaxation of careful methods is advocated in every-daj work, but it is not generally necessary in making periodical tests to take reversals or to take more than one minute's reading with the zinc current on each wire, except in the case of new cables or when a fault is suspected. CHAPTER XI. Test for Insulation.--(Continued.) To return to our specific example of the test for insulation resistance. The behavior of the spot should be carefully watched, and at the end of one minute from the time of turning on the current the exact deflection should be noted. This deflection serves for working out the insulation resistance by comparison with the galvanometer constant; the figures for insulation resistance are generally stated to be "after one minute's electrification." We will assume that the cable being tested is 2,640 feet long and that the deflection after one minute is 60 divisions on the scale. The constant of the galvanometer being 30,000, the absolute insulation resistance of the cable is-3 W9 = 500 megohms. As cables vary in length it is obviously useless, for purposes of comparison, to know the insulation resistance of a cable without also knowing its length, and even so it is not convenient to have to refer to two separate quantities; therefore it is usual to speak of the resistance per unit of length, and the insulation resistance per mile is the figure by which we can best judge of the actual condition of a...
Author:
Publisher:
ISBN:
Category : American literature
Languages : en
Pages : 1894
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Book Description
Author: Rose Arny
Publisher:
ISBN:
Category : American literature
Languages : en
Pages : 1372
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Book Description
Author: David Barnett
Publisher: John Wiley & Sons
ISBN: 078215087X
Category : Computers
Languages : en
Pages : 733
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Book Description
The physical linkages responsible for carrying a company's data continue to be the most neglected components of the typical network—to the extent that nearly 70% of all network-related problems result from poor cabling. In this third edition of a widely acclaimed resource, three networking experts share their extensive experience, teaching you the cabling skills you need to build a reliable, efficient, and cost-effective network cabling infrastructure. As you master these techniques, you'll learn to avoid common pitfalls and troubleshoot problems as quickly as they arise. Coverage includes: Choosing the right cables and components for your network architecture and topology Avoiding unnecessary and unexpected costs Understanding the current limitations of data communications and network cabling Understanding how laws and building codes constrain cabling Understanding the function and importance of universal cabling standards Determining when you have a cabling-related network problem Assembling a complete cabling toolkit Integrating voice and data on the same cable system Setting up an infrastructure in which desktops, printers, copiers, and other nodes share cabling Understanding issues of bandwidth, impedance, resistance, attenuation, crosstalk, capacitance, propagation, delay, and delay skew Working effectively with USB and Firewire Knowing when to discard legacy cabling and begin anew Documenting your cabling Creating an RFP and selecting a vendor
