Ieee green book, standard 142 1992 or latest edition, ieee. Principles of electrical grounding pfeiffer engineering. This book is a revision of ieee std 142 1991, the ieee green book. According to the ieee green book about 68% of the voltage is dropped in the first 1. Soares book on grounding and bonding is an excellent general reference on grounding and has a chapter on grounding. Grounding versus bonding part 1 of 12 mike holt enterprises. Groundingandbonding nationalelectricalcode article250 byjim. Since grounding bonding is such a big part of power quality, i get a new book every 3 years. According to the ieee green book3, the grounding electrode resistance of. A thorough investigation of grounding problems, and the methods for solving these problems, is presented. Soares book on grounding and bonding, th edition nec. Ieee recommended practice for grounding of industrial and. According to ansi ieee 142, recommended practice for grounding of industrial and commercial power systems green book 4.
For power quality concerns, this assumption leaves the grounding resistance to chance. This recommended practice has served electrical engineers seeking electrical system grounding information since the first edition. Its an easy read that is written for learning and understanding, not just a reference like nfpa 70 nec code book. View profile view forum posts new member join date mar 2006 posts 10. Ieee std 142 2007 green book grounding of industrial and commercial power systems. To ground handbook and the international association of. Two good sources for more information on this are soares book on groundingand ieee 142. Also, ieee 142 describes the correct way to provide an isolated ground and it isnt the method proposed by many. Ieee standard 1100 outlines the recommended practices for powering and grounding electronic equipment. Ieee std 1422007 ieee recommended practice for grounding of industrial and commercial power systems green book the problems of system grounding, that is, connection to ground of neutral, of the corner of the delta, or of the midtap of one phase, are covered. Red book ieee std 1411993 r1999, recommended practice for the electric power distribution for industrial plants. Soares has long been the grounding standard for field people in the electrical industry, while ieee 142 has long been the grounding standard for electrical engineers. The ieee green book is a useful reference tool that every practicing electrical engineering should have access to. Nontinning general copper and copper alloys are widely used because they combine unique properties at an economical price.
Ive been using soares book on grounding for 15 years. This article isnt a preferred design specification. This ieee standars product is part of the color books family. Grounding and bonding to csa and nec standards improving.
Soares book on grounding and bonding 9th edition book. May 02, 2017 soares book on grounding and bonding, th edition nec 2017 international association of electrical inspectors, kathryn p. Soares book on grounding and bonding 9th edition by. Ieee recommended practice for grounding of industrial and commercial power systems commonly called the green book ieee std. The grounding and bonding requirements contained in this column apply to solidly. Several of the ieee color books give ieee s recommendations on power system distribution systems, power system grounding, system protection and design analysis. Soares book on grounding and bonding, based on the 2011 nec. This book is a revision of ieee std 1421991, the ieee green book. Soares book on grounding download ebook pdf, epub, tuebl.
The overlap increases the net resistance of each rod, making the grounding electrode system less effective than if the rods were spaced farther apart. Ieee 142 gives a thorough theoretical treatise of it. When you ground, you connect something to the earth you can read more about this distinction in the ieee 142, the green book and in the national electrical code, article 250 and in other sources. Iaei soares book on grounding, international association of electrical.
This article discusses what makes up a good instrument grounding. We could easily address 10 more top tips for article 250. Ieee std 1422007 revision of ieee std 1421991 ieee. Per the ieee the green book, standard 142 2007 recommended practice for grounding industrial and commercial power systems, the term ground is defined as a conducting connection, whether intentional or accidental, between an electrical circuit or equipment and the earth, or to some other body that serves in place of the earth. Published by theinstitute of electrical andelectronics engineers, inc. This site is like a library, use search box in the widget to get ebook that you want. Electric service to metal building, grounding, etc.
Soares, grounding electrical distribution systems for safety regards, phil corso email protected. Facility and equipment grounding to enhance equipment. This is not only due to its high degree of connectivity, but also its corrosion resistance. Soares grounding electrical distribution systems for safety. Ieee series of color books, two of which deal with grounding and bonding. Ground earth resistance in low voltage soares book on grounding published by the iaei has an appendix titlrd the history and mystery of grounding. Jul 01, 2014 ive been using soares book on grounding for 15 years. The terms ground, grounding and grounded as defined by the national electrical code refer to earth or a connection to earth. Soares book grounding and bonding 9th edition icons. Two good sources for more information on this are soares book on grounding and ieee 142. Ieee standard 1421991, recommended practice for grounding of industrial and.
Ieee recommended practice for grounding of industrial and commercial power systems ieee green book edition. For more technical questions on grounding design and engineering though i find the ieee green and emerald books a better reference. Soares book on grounding and bonding, th edition nec 2017. The problems of system grounding, that is, connection to ground of. Design, engineering, installation, and enforcement perspectives for grounding and bonding come together in this unique, hands on electrical reference.
The interconnection and grounding of the nonelectrical metallic elements of a system is covered first. It is good reference for nec related questions about grounding especially since a lot of electrical inspectors use it for guidance in applying the nec. According to the ieee green book 3, the grounding electrode resistance of large electrical substations should be 1 ohm or less. Ieee std 142 2007 ieee recommended practice for grounding of industrial and commercial power systems green book the problems of system grounding, that is, connection to ground of neutral, of the corner of the delta, or of the midtap of one phase, are covered. As with the rest of the nec, it serves the purpose stated in article 90 to be sure the installation is, and remains, safe. The problems of system grounding, that is, connection to ground of neutral, of the corner of the delta, or of the midtap of one phase, are covered. Observations on supplemental grounding and bonding systems. This is followed by a discussion of the objectives of equipment grounding and bonding, including minimizing electric shock hazard to personnel, providing. Books on grounding znec zieee green book 142 1991recommended practice for. Soares contains some examples of maximum lengths as a function of.
Magison has an excellent chapter human electrical safety. The grounding and bonding of equipment in industrial and commercial power systems is covered in this recommended practice. Ieee std 1422007 green book grounding of industrial and. Down to earth about grounding electrical contractor magazine. International association of electrical inspectors, 1980.
Observations on supplemental grounding and bonding. For reference, see ieee 142 and soares book on grounding. Ieee std 142 2007 recommended practice for grounding of industrial and commercial power systems. Ieee142 and soares book on grounding use the same physics and. Books on grounding znec zieee green book 142 1991recommended practice for grounding of industrial and commercial power systems emerald book 11001999 recommended practice for powering and grounding sensitive electronic equipment zindustrial and commercial power system handbook. The green wire concept is so vital that recognized industry documents mandate. Surface voltage gradients according to ansi ieee 142, recommended practice for grounding of industrial and commercial power systems green book 4.
Inspectors iaei soares book on grounding are recommended see access. Ieee std 142 1991, recommended practice for grounding of industrial and commercial power systems green book, ieee std 11002005, and the international association of electrical inspectors soares book on grounding, edition 9. The nec just gives the minimal requirements for safety. If you want to learn about grounding and bonding, this is the book. Eustace soares book, grounding electrical distribution systems for safety was originally published in 1966 and was based upon the 1965 edition of the national electrical code. For power quality concerns this assumption leaves the grounding resistance to chance. Grounding and bonding are the least understood, the most misinterpreted and confusing elements in modern electrical and electronic systems and leads to poor design and installation work especially as it relates to the canadian electrical code cec and to the national electrical code nec requirements. This is a discussion of the basic principles behind grounding systems and how grounding is related to safety and. Ieee142 and soares book on grounding use the same physics and electrical theory as article 250. Click download or read online button to get soares book on grounding book now. The speaker will offer an overview of the latest revision of the chapter on grounding. This recommended practice has served electrical engineers seeking electrical system grounding information since the first edition in 1956. Soares book on grounding and bonding, th edition nec 2017 international association of electrical inspectors, kathryn p. Electrical inspectors publication, soares book on grounding and bonding.
When you consider that soares is a product of the international association of electrical inspectors, this division of labor makes sense. So when you think of grounding, you could think of it as earthing to keep things straight in your mind. Article 250 grounding and bonding mike holt enterprises. Facility and equipment grounding to enhance equipment performance 2011 course. These include high thermal and electrical conductivity, ease of manufacture, high recyclability and good corrosion resistance. Pdf ieee standard 1421991 the green book vicente martinez. The problems of system grounding, that is, connection to ground of neutral, of the corner of the delta, or of the. Information is given on how to ground the system, where the system should be grounded, and how to select equipment for the ground of the neutral circuits. Ieee recommended practice for equipment grounding and. Article 250 covers the grounding requirements for providing a path to the earth to reduce overvoltage from lightning, and the. Soares book on grounding and bonding is an excellent general. Green book ieee std 142 2007, recommended practice for grounding of industrial and commercial power systems. Ground rods spaced less than two rodlengths apart will interfere with each other because their effective resistance areas will overlap fig. Ieee std 142 2007 revision of ieee std 142 1991 ieee recommended practice for grounding of industrial and commercial power systems sponsor power systems engineering committee of the ieee industry applications society approved 7 june 2007 ieee sa standards board.
This is followed by a discussion of the objectives of equipment grounding and bonding, including minimizing electric shock hazard to personnel. Recommended practice for grounding of industrial and commercial power systems. It reflects the experience and sound judgment of a working group made up of engineers active in the design and operation of electrical. Grounding of electrical systems outline zdefining the terms zwhy should i ground. Ansiieee standard 142, recommended practice for grounding of industrial and commercial power systems green book and soares. Copper is the preferred metal for grounding conductors and electrodes. The iaei book even gives some of the history of grounding requirements in the u. Ieee std 1100 2005 revision of ieee std 11001999 ieee recommended practice for powering and grounding electronic equipment sponsor power systems engineering committee of the industrial and commercial power systems department of the ieee industry applications society approved 9 december 2005 ieee sa standards board approved 29 december 2005.
Ieee emerald book, standard 11001999 or latest edition, ieee, new york, ny. Grounding electrical distribution systems for safety, wayne, nj. An abbreviated bibliography of power quality information sources. The green book is titled recommended practice for grounding of industrial and commercial power systems, while the emerald book covers recommended practice for powering and grounding electronic equipment. The color book set is composed of volumes as follows.
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