Soares book on grounding and ieee 142 grounds

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. Soares book on grounding and bonding, th edition nec 2017. Ieee std 142 2007 recommended practice for grounding of industrial and commercial power systems. Concreteencased electrodes are required to be included in the grounding electrode system for buildings or structures. 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 ieeesa standards board approved 29 december 2005. May 02, 2017 soares book on grounding and bonding, th edition nec 2017 international association of electrical inspectors, kathryn p. The grounding and bonding requirements in this column apply to solidly. 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. Magison has an excellent chapter human electrical safety. Ufer grounds concrete encased electrode building footings if designed as ufer grounds water pipes ground ring plate electrodes. We could easily address 10 more top tips for article 250. Current european standards hd 631 s11999 e have fostered the socalled common grounding system cgs concept.

The iaei book even gives some of the history of grounding requirements in the u. The main bonding jumper is the link between the neutral and the equipment ground bars within the. This book is a revision of ieee std 142 1991, the ieee green book. The overlap increases the net resistance of each rod, making the grounding electrode system less effective than if the. Soares book on grounding and bonding 9th edition by. Grounding is a present tense word grounding indicates a process that is ongoing grounding is an action required at enclosures and equipment in electrical circuits from the source or service to. The grounding and bonding of equipment in industrial and commercial power systems is covered in this recommended practice. Design, engineering, installation, and enforcement perspectives for grounding and bonding come together in this unique, handson electrical reference. Jan 01, 2002 soares book on grounding paperback january 1, 2002 by soares author 3. Grounding versus bonding part 1 of 12 mike holt enterprises. Present a new process for installing deepdriven ground rods.

Soares grounding electrical distribution systems for safety. Feb 12, 2018 for reference, see ieee 142 and soares book on grounding. This book is a revision of ieee std 1421991, the ieee green book. Since grounding bonding is such a big part of power quality, i get a new book every 3 years. According to ansi ieee 142, recommended practice for grounding of industrial and commercial power systems green book 4. The overlap increases the net resistance of each rod, making the grounding electrode system less effective than if the rods were spaced farther apart. 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. It allows circuit breakers to trip on fault current and provides a path for lightning.

Also, ieee142 describes the correct way to provide an isolated ground. Ieee 1411993, ieee recommended practice for electric power distribution for industrial plants, ieee red book. No other article can match article 250 for misapplication, violation, and misinterpretation. Improving your skills in electrical grounding and bonding has never been easier. For commercial and industrial substations the recommended ground resistance is 25 ohms or less. Grounds for grounding a circuittosystem handbook elya b.

Electrical inspectors publication, soares book on grounding and bonding. Per the supplement the nec with soares book on grounding and ieee 142. Ieee std 142 2007 revision of ieee std 142 1991 ieee recommended practice for grounding of industrial and commercial power systems. Ieee recommended practice for grounding of industrial and. In my area, no one could even remember selling a grounding plate electrode. For reference, see ieee 142 and soares book on grounding.

Ieee standard 142 indicates that ground plates can be buried either horizontal or. 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. Iaei has brought grounding down to earth in this updated book. According to the ieee green book 3, the grounding electrode resistance of large electrical substations should be 1 ohm or less. When you consider that soares is a product of the international association of electrical inspectors, this division of labor makes sense. What are the nec requirements for grounding and bonding. Ieee 142 1991, ieee recommended practice for grounding of industrial and commercial power systems, ieee green book. Jun 01, 2008 in trying to compare ground rod and ground plates, i made phone calls for pricing grounding plates. Soares book on grounding and bonding is an excellent general reference on grounding and has a chapter on grounding of electronic systems. Power systems green book and soares book on grounding use the same physics and. If you want to learn about grounding and bonding, this is the book. More details about ufers research and findings are provided in his ieee paper cp978. Ieee std 1422007 revision of ieee std 1421991 ieee. Design, engineering, installation, and enforcement perspectives for grounding and bonding come together in this unique, hands.

Iec 102341 ieee std 80 as3000as2307 iec 6645 nfpa 70 nec as 1768env 610241 ul 96a bs 1400 csa c22. Grounding of two wire circuits page 3 mike holts forum. Soares book on grounding and bonding, th edition nec. 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.

First, the ground or grounding of a circuit is a misnomer. Soares book on grounding and bonding, based on the 2011 nec. Ieee std 142 1982, ieee recommended practice for grounding of industrial and commercial power systems the ieee green book 9781559371414 by institute of electrical. To ground handbook and the international association of.

Principles of electrical grounding john pfeiffer, p. Common grounding system ieee conference publication. This is a discussion of the basic principles behind grounding systems and how grounding is related to safety and the effective. Grounding is a present tense word grounding indicates a process that is ongoing grounding is an action required at enclosures and equipment in electrical circuits from the source or service to the final outlets on the circuit it is accomplished by using an equipment grounding conductor of any type specified in 250. A thorough investigation of grounding problems, and the methods for solving these problems, is presented. 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. Nec article 250, soares book on grounding, and ieee 142. This is a discussion of the basic principles behind grounding systems and how grounding is related to safety and the effective operation of circuit protection devices such as fuses and circuit breakers. See all formats and editions hide other formats and editions. As with the rest of the nec, it serves the purpose stated in article 90 to be sure the installation is, and remains, safe. Ieee 142 and soares book on grounding use the same physics and electrical theory as article 250. The first book to cover grounding from the circuit to system and across the entire spectrum of applications grounds for grounding provides a complete and thorough approach.

Inspectors iaei soares book on grounding are recommended see access. Ieee std 1100 2005 revision of ieee std 11001999 ieee recommended practice for powering and grounding electronic equipment sponsor power systems engineering. It reflects the experience and sound judgment of a working group made up of engineers active in the design and operation of electrical. Design of grounding grid according to ieee standards. Ieee recommended practice for equipment grounding and. Ieee142 and soares book on grounding use the same physics and electrical. It has only recently begun to address power quality issues. Intentionally connected to earth through a ground connection or. Consulting specifying engineer grounding requires more. Ansiieee standard 142, recommended practice for grounding of industrial and commercial power systems green book and soares book on grounding use the same physics and electrical theory as art. The first book to cover grounding from the circuit to system and across the entire spectrum of applications grounds for grounding provides a complete and thorough approach to the subject of designing electrical and electronic circuits and systems, blending theory and.

Ieee 802000, guide for safety in ac substation grounding, 1986. Principles of electrical grounding pfeiffer engineering. What are the nec requirements for grounding and bonding rebar. Article 250 grounding and bonding mike holt enterprises. Soares book on grounding and bonding, 2014 explains how and why certain grounding methods are used, but it does so in a logical way, balancing text with photos and illustrations. Two good sources for more information on this are soares book on groundingand ieee 142.

Soares contains some examples of maximum lengths as a function of. We additionally see requirements for bonding steel rebar in concrete in ieee 1100 emerald book section 8. Magnetic build up, harmonics, transients, emiemf and other objectionable currents that can build up on steel rebar will need a path to ground. Facility and equipment grounding to enhance equipment. Grounding electrode system and grounding electrode conductor part iii znec 250. Pay careful attention to the definitions that apply to grounding and bonding both here and in article 100 as you begin the study of this important article. Soares book on grounding, international association of electrical inspectors, fifth edition, published in 5 th december, 2012 by larry j. The interconnection and grounding of the nonelectrical metallic elements of a system is covered first. The overlap increases the net resistance of each rod, making the grounding electrode system less effective than if the rods were spaced farther apart fig. To avoid power quality problems, the recommended practices and references published in ieee 1100 the emerald book, ieee 142. Investigation and testing of footingtype grounding electrodes for electrical installations. Facility and equipment grounding to enhance equipment performance 2011 course.

This article isnt a preferred design specification. The zerosequence reactance has the lowest value, and the positive sequence reactance varies as a function of time. Ive been using soares book on grounding for 15 years. This is followed by a discussion of the objectives of equipment grounding and bonding, including minimizing electric shock hazard to personnel, providing. Soares book on grounding and bonding re nec article.

This recommended practice has served electrical engineers seeking electrical system grounding information since the first edition in 1956. From ieee std 142 1991 green book it should be noted that the values listed in table 4 for greenfield flexible metal conduit and bx without ground ac cable are excessive. Groundingandbonding nationalelectricalcode article250 byjim. Grounding explanation electrical wiring electric current. Article 250 covers the grounding requirements for providing a path to the earth to reduce overvoltage from lightning, and the.

Personnel safety difference of potential without protection without. Soares book on grounding and bonding international. According to ansiieee 142, recommended practice for. According to the ieee green book 3, the grounding electrode resistance of large electrical substations. International association of electrical inspectors iaei clean grounds. The overlap increases the net resistance of each rod, making the grounding electrode system less effective than if the rods. The terms ground, grounding and grounded as defined by the national electrical code refer to earth or a connection to earth.