File Name: lineman and cableman handbook .zip
This Handbook is written for the apprentice, the lineman, the cableman, the foreman, the supervisor, and other employees of electric line construction contractors and transmission and distribution departments of electric utility companies. It is primarily intended to be used as an apprenticeship textbook and a home-study book to supplement daily work experiences. This Handbook has 50 chapters; 11 chapters are devoted to a general understanding of electricity, electrical terms, and electric-power systems; 31 chapters are devoted to actual construction of overhead and underground distribution and transmission lines and to maintenance procedures; and 7 chapters are expressly devoted to safety guidelines.
Written in English. For Linemen!
Shoemaker, P. Army James E. Mack, P. All rights reserved. Except as permitted under the United States Copyright Act of , no part of this publication may be reproduced or distributed in any form or by any means, or stored in a database or retrieval system, without the prior written permission of the publisher. Rather than put a trademark symbol after every occurrence of a trademarked name, we use names in an editorial fashion only, and to the benefit of the trademark owner, with no intention of infringement of the trademark.
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Rope, Knots, Splices, and Gear Chapter Introduction II. General III. Determination of the electrical component of minimum approach distances IV. Inspection of wood poles III. The Field Manual contains many of the same pertinent tables, charts, formulas, and safety rules that are found in the Handbook. The goal of the Field Manual is to provide the information that is needed on the job site in a format that can be quickly and easily accessed.
This customizable tool provides specially designed notes pages for personal notes. It is written for the apprentice, the lineman, the cableman, the foreman, the supervisor, and other employees of electric line construction contractors and transmission and distribution departments of electric utility companies. The Field Manual contains definitions of electrical terms and diagrams of electric power systems, plus sections devoted to line conductors; cables, splices, and terminations; distribution voltage transformers; guying; lightning and surge protection; fuses; inspection and maintenance plans; tree trimming; rope, knots, splices, and gear; grounding; protective grounds; and safety equipment and rescue.
Safety is emphasized throughout this book. Of course, understanding the principles involved in any operation and knowing the reasons for doing things a given way are the best aids to safety. The opinion has become quite firmly established that a person is not a good lineman unless he does his work in accordance with established safety procedures and without injury to him or others.
It is necessary for those engaged in electrical work to know the safety rules and the precautions applicable to their trades as specified in the National Electrical Safety Code, OSHA standards, and their employer s safety manuals and standards. Observing safety rules and procedures must be an inseparable part of their working habits. Important requirements of all of these are discussed, but also they should be studied for detailed work procedures. Many applicable codes and standards are specified throughout the text to assist the reader.
The lineman and the cableman must become acquainted with the minimum construction requirements and maintenance and operating procedures in the various codes and standards to ensure the safety of the public and all workers. The National Electrical Code details the rules and regulations for electrical installations, except those under the control of an electric utility. It excludes any indoor facility used and controlled exclusively by a utility for all phases from the generation through the distribution of electricity and for communication and metering, as well as outdoor facilities on a utility s own or a leased site or on public or private by established rights property.
The editors are well aware that one cannot become a competent lineman or cableman from a study of the pages of this book alone. However, diligent study along with daily practical experience and observation should give the apprentice an understanding of construction and maintenance procedures and a regard for safety that should make his progress and promotion rapid. Thomas M. Shoemaker James E.
Both men and women are employed in these capacities in the military and in the industry. To avoid awkardness, this Field Manual uses the masculine pronoun, but it in no way implies that the jobs involved are held only by men. Because it would be impossible to make a pictorial drawing of each device shown in a diagram, the device is represented by a symbol.
A list of some of the most common electrical symbols used follows. It is noted that the symbol is a sort of simplified picture of the device represented. Figure 1. Units of Measurement Time 1 minute 60 seconds 1 hour 60 minutes 3, seconds 1 day 24 hours 1, minutes 86, seconds hertz AC electric system 60 cycles per second 1 second 60 cycles milliseconds 6 cycles milliseconds 15 cycles milliseconds 30 cycles.
Volt V The unit of measurement of voltage in an electric circuit, denoted by the symbol V. Current I The flow of free electrons in one general direction, measured in units of amps. Amp A The unit of measurement of electric current, denoted by the symbol A. Direct-Current dc Current that flows continually in one direction. Alternating-Current ac Current that flows in a circuit in a positive direction and then reverses itself to flow in a negative direction.
Resistance R The electrical friction that must be overcome through a device in order for current to flow when voltage is applied. Ohm The unit of measurement of resistance in an electric circuit, denoted by the symbol.
Inductance H The property that causes the current to lag the voltage, measured in units of henries. Capacitance F The property that causes the current to lead the voltage, measured in units of farads.
The unit of measurement is the watt hour. Power P The combination of electric current and voltage causing electricity to produce work. Power is composed of two components: real power and reactive power.
Volt-Ampere VA The unit of both real and reactive power in an electric circuit. Real Power The resistive portion of a load found by taking the cosine of the angle that the current and voltage are out of phase. Watt W The unit of real power in an electric circuit. Reactive Power The reactive portion of a load, found by taking the sine of the angle that the current and voltage are out of phase.
Var Q The unit of reactive power in an electric circuit. Power Factor pf The ratio of real power to reactive power. Frequency f The number of complete cycles made per second, measured in units of hertz. Hertz Hz Units of frequency equal to 1 cycle per second.
Conductors Materials that have many free electrons and are good transporters for the flow of electric current. Insulators Materials that have hardly any free electrons and inhibit or restrict the flow of electric current. Series Resistive Circuit All of the resistive devices are connected to each other so that the same current flows through all the devices. Parallel Resistive Circuit Each resistive device is connected across a voltage source.
The current in the parallel path divides and only a portion of the current flows through each of the parallel paths. Formulas and Calculations In this section, the most common electrical formulas are given and their use is illustrated with a problem. In each case the formula is first stated by using the customary symbols, the same expression is then stated in words, a problem is given, and finally the substitutions are made for the symbols in the formula from which the answer is calculated.
Only those formulas which the lineman is apt to have use for are given. The formulas are divided into three groups: dc circuits, ac circuits, and electrical apparatus. The formula for Ohm s law is the most fundamental of all electrical formulas. It expresses the relationship that exists in an electric circuit containing resistance only between the current flowing in the resistance, the voltage impressed on the resistance, and the resistance of the circuit: I 5 E R where I current, amps E voltage, volts R resistance, ohms Expressed in words, the formula states that current equals voltage divided by resistance, or: Amperes 5 volts ohms Example: How much direct-current will flow through a resistance of 10 ohms if the pressure applied is volts direct-current?
Solution: I 5 E R amps Ohm s law involves three quantities: current, voltage, and resistance. Therefore, when any two are known, the third one can be found. The procedure for solving for current has already been illustrated.
To find the voltage required to circulate a given amount of current through a known resistance, Ohm s law is written as: E IR In words, the formula says that the voltage is equal to the current multiplied by the resistance; thus: Volts 5 amperes 3 ohms Example: How much direct-current dc voltage is required to circulate 5 amps direct current through a resistance of 15 ohms?
Solution: E 5 IR volts In like manner, if the voltage and current are known and the value of resistance is to be found, the formula is: R 5 E I. The resistance of each lamp is 8 ohms. How much current is flowing in the circuit? A series circuit. The same current flows through all the. Each lamp is independent of the other lamps and draws its own current. The expression for the power drawn by a dc circuit is: P EI where E and I are the symbols for voltage in volts and current in amperes, respectively and P is the symbol for power in watts.
Expressed in words, the formula says that the power in watts drawn by a dc circuit is equal to the product of volts and amperes; thus: Power 5 volts 3 amperes Example: How much power is taken by a volt dc circuit when the current flowing is 8 amps direct-current? Solution: P 5 EI watts This power formula also contains three quantities terms : watts, volts, and amperes. Therefore, when any two of the three are known, the third one can be found.
The procedure for finding the power when the voltage and current are given has already been illustrated. When the power and voltage are given and the current is to be found, the formula is: I 5 P E. Solution: I 5 P E amps In like manner, when the power and current are known, the voltage can be found by writing the formula; thus: E 5 P I Expressed in words, the formula says that the voltage is equal to the power divided by the current; thus: Volts 5 watts amperes Example: What dc voltage would be required to deliver watts with 6 amps direct-current flowing in the circuit?
Written in English. Salary Assistant Treasurer United States. The Field Manualcontains many of the same pertinent tables, charts, formulas, and safety rules that are found in the Handbook. The goal of the Field Manualis to provide the information that is needed on the job site in a format that can be. The Lineman's and Cableman's Field Manual, Second Edition, provides easy-to-follow details on constructing, operating, and maintaining both overhead and underground electric distribution and transmission lines. Download it once and read it on your Kindle device, PC, phones or tablets.
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Когда я опустился на колени, чтобы помочь ему, этот человек стал совать мне пальцы прямо в лицо. Он хотел отдать кольцо. Какие же страшные были у него руки. - Вот тут-то вы и рассмотрели его кольцо. Глаза Клушара расширились. - Так полицейский сказал вам, что это я взял кольцо. Беккер смущенно подвинулся.
Целясь в торс, он сводил к минимуму возможность промаха в вертикальной и горизонтальной плоскостях. Эта тактика себя оправдала. Хотя в последнее мгновение Беккер увернулся, Халохот сумел все же его зацепить. Он понимал, что пуля лишь слегка оцарапала жертву, не причинив существенного ущерба, тем не менее она сделала свое. Контакт был установлен. Жертва ощутила прикосновение смерти, и началась совершенно иная игра. Беккер мчался, не видя ничего вокруг, постоянно сворачивал, избегая прямых участков.
Он вылетел из-за поворота на уровне лодыжек подобно рапире фехтовальщика. Халохот попробовал отклониться влево, но не успел и со всей силы ударился об него голенью. В попытке сохранить равновесие он резко выбросил руки в стороны, но они ухватились за пустоту. Внезапно он взвился в воздух и боком полетел вниз, прямо над Беккером, распростертым на животе с вытянутыми вперед руками, продолжавшими сжимать подсвечник, об который споткнулся Халохот. Халохот ударился сначала о внешнюю стену и только затем о ступени, после чего, кувыркаясь, полетел головой. Пистолет выпал из его рук и звонко ударился о камень.
Спросил он, обращаясь в пустоту и чувствуя, как покрывается. Наверное, придется потревожить этой новостью Стратмора. Проверка на наличие вируса, - решительно сказал он себе, стараясь успокоиться.
This customizable tool provides specially designed notes pages for personal notes. It is written for the apprentice, the lineman, the cableman, the foreman, the.Lepharwiben 25.12.2020 at 01:29
This Handbook is written for the apprentice, the lineman, the cableman, the Edition by Thomas M. shoemaker and James E. Mack easily in PDF format for free.Betsy M. 25.12.2020 at 20:31
Material properties (DataVis). Cover of Lineman's and Cableman's Handbook, Thirteenth Edition Share; Bookmark; Labels. Summary PDF. Annotate. Table of.Sylvie D. 27.12.2020 at 23:30
Shoemaker, P.Barbelo G. 28.12.2020 at 11:36
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