From motor lead disconnects and compression connectors to conduit fittings and seismic bracing, abb provides the electrical systems and components you need to ensure reliable operation and minimal downtime. Grounding and bonding are necessary for safe electrical installations. Fibre metal laminates, background, bonding types and applied test methods. Lowvoltage and intersystem grounding and bonding 20. Topics covered include service, feeder, and branch circuit grounding and bonding, as well as more specialized topics such as grounding and bonding in health care facilities. Bonding is defined in the nec as the permanent joining of metallic parts required to be electrically connected. Bonding ground rod ground rod current source lightning average current 30,000 amps. Equipment grounding conductor as defined in the nec. Temporary power generation and electrical distribution 3. Antenna system bonding and grounding requirements in the usa. For effectivelygrounded systems this ratio is usually at least 60% 2. This first was proposed by ef vance of stanford research institute in 1977.
Grounding of electrical systems outline zdefining the terms zwhy should i ground. Grounding is, in essence, the control of abnormal voltages or currents through the proper application of ohms law. Ground a conducting connection, whether intentional or accidental, between an. Johnston few topics are more important to an electrical installation and to an electrical worker than grounding and bonding. A terminal temporarily attached to a structure that provides a means for the attachment and bonding of grounding and bonding cables to the structure. Bonding, grounding and earthing electrical engineering portal. Figure 2 illustrates the basic circuit that consists of a source, a transformer or. As applied to imc or steel rmc this is a threaded, straighttapped means of joining two pieces of conduit. A free powerpoint ppt presentation displayed as a flash slide show on id. This site is like a library, use search box in the widget to get ebook that.
Power, grounding, bonding, and audio for ham radio safety. This paragraph applies to the grounding and bonding of equipment and vehicles involved in maintenance activities on or near power lines. Bonding and grounding strategies for the telecommunications room by tom turner installation page 16 january 008. Practical grounding, bonding, shielding and surge protection.
Click download or read online button to get practical grounding bonding shielding and surge protection book now. Pdf practical grounding, bonding, shielding and surge. Ppt grounding the electrical system powerpoint presentation. Equipment grounding conductors, grounding electrodes conductors, and bonding jumpers shall be connected by one or more of the following means.
Copies of proposals are published in the nec rop for the 20 annual revision cycle. Bonding is the process of connecting to conductive objects together. Bonding, grounding and earthing in a data centre minkels white paper 11 1. The minimum bonding conductor or jumper sizes must be in accordance with table 250. The revisions address minimum sizes for equipment grounding conductors egcs in multiconductor cables in. A cable connected to two conductive parts to bond the parts together. A technicians guide to low and mediumvoltage circuit breakers commercial and industrial wiring conduit bending and fabrication digital multimeter principles electric motor drive installation and troubleshooting electrical math principles. Practical grounding, bonding, shielding and surge protection unlike many books on grounding and shielding, provides straightforward, practical solutions to commonly encountered realworld situations and enables one to better understand proper ground methods and to quickly recognize and solve existing grounding issues in a facility. Bonding all building grounds breaker panel ham shack tower telco cable tv cold water ground rods radials grounding is for safety lightning protection blows a breaker if a power system short connections should be big copper and short. 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. Bonding all building grounds breaker panel ham shack tower telco cable tv cold water ground rods radials grounding is for safety lightning protection. By location, the lions share of grounding and bonding opportunities for telecommunications installers exist in telecommunications rooms.
Most utility systems which supply service for commercial and industrial systems are solidly grounded. Copperbonded rods last longer, drive easier and will not crack. It is an active,functioning system that provides protection for personnel and. To analyze how an electrical shock occurs and how grounding is applied, you need to look at the circuit involved. Wiesinger appropriated the idea where itmigrated intotodaysiec 62305. Poor grounding practice can be the cause of continual and intermittent difficulttodiagnose problems in a facility.
Few topics are more important to an electrical installation and to an electrical worker than grounding and bonding. Earthing grounding of power electronic and distributed. Grounding and bonding grounding is the process of connecting a system, equipment, or both to the earth. Bonding connectors and the fastenings and processes used to connect them to the conductive elements of bonding networks shall be designed to provide and maintain a d. When noncurrentcarrying parts of equipment are bonded together and connected to ground, bonding and grounding are accomplished, enhancing safety in. Scribd is the worlds largest social reading and publishing site. Ge grounding equilizer the conductor that interconnects elements of the telecommunications grounding infrastructure. Chapter 1, introduction chapter 5, requirements for grounded conductors at services chapter, grounding and bonding for separately derived systems. In addition, it is the path by which a fault is transmitted to the overcurrent protection device.
Electrical grounding and bonding, 4e a userfriendly, practical guide provides a thorough and effective introduction to the essentials of electrical grounding and bonding. One function compliments and supports the other simultaneously. Applied grounding and bonding njatc updated to the. Industrial automation wiring and grounding guidelines 5 publication 17704. Space station electrical bonding international space station. Grounding and bonding means that conductive parts are connected together and to the earth. Bonding is generally done as protection from electrical shocks. What is the difference between bonding, grounding and. Any intentional or accidental connection between an electrical circuit or instrument and the earth is known as grounding.
International space station program space station electrical bonding requirements list of changes 15 october 1999 all changes to paragraphs, tables, and figures in this document are shown below. Through extensive laboratory testing, this has been. Proper, codecompliant grounding and bonding is essential for a safe electrica. Neutral and ground connections at service equipment the nec permits the grounded neutral conductor, the equipment enclosure, and the grounding electrode conductor to all terminate together. The ieee green book, standard 142, contains useful reference information on system grounding factors in selecting a system grounding method and equipment grounding and methods. Index the grounding and bonding system is more than just an insurance policy against a lightning strike or other surge event. Temporary grounding and bonding techniques introduction it has been generally accepted that when temporary grounds were applied to isolated equipment, it would become deenergized, thus ensuring electrical hazards would be totally eliminated for anyone who might make contact with the equipment. Bonding is more clear word compare to grounding and earthing, but there is a micro difference between grounding and earhing. Basics of electrical grounding earthing and bonding. The main bonding jumper connects the groundedneutral conductor to the distribution panel enclosure, to the equipment grounding conductors, and to the groundedneutral conductor coming from the incoming electrical service providers wiring.
Grounding of systems or circuits of over volts 21. These interdependent disciplines are best applied when looking at a total facility rather than an individual piece of equipment or portion of a facility. Click download or read online button to get understanding nec rules on grounding and bonding book now. Is it permissible to land the equipment grounding conductors on the. To provide continuous grounding path around devices such as. Implementation of good electrical grounding architecture is a n important part of overall mission success for spacecraft. A conducting connection between an electric circuit or equipment and the. The full technical ebook manual for practical earthing, bonding, lightning and surge protection, which includes course slides, cases studies, calculations and practical exercises four hours of additional indepth video sessions covering many additional areas yours to keep and watch any time you want. Design and installation of electrical grounding systems is one of the most important aspects of any electrical distribution system, yet it is all too often misunderstood and subsequently installed improperly. Protective grounding requirements for transmission and. Grounding and bonding 1 chapter grounding and bonding grounding and bondin g grounding and bonding must be in accordance with article 250 of the national electrical code nec.
Grounding of ac generators and switching the neutral in. Applied grounding and bonding njatc updated to the 2017. Article 250 grounding and bonding mike holt enterprises. Soares book on grounding and bonding tenth edition international association of electrical inspectors richardson, texas.
Learn vocabulary, terms, and more with flashcards, games, and other study tools. The primary objective of proper grounding architecture. Sscbd entry date change paragraphs 000008 r1 6394 revision b all 53196 revision c all 6498 revision d all 101599 revision e all. The concept of topological application of bonding, grounding and surge protection zones must be applied. You have reached 0 of 0 points, 0 not categorized 0% question 1 of 15. Johnston neca executive director, standards and safety 1 welcome to a neca webinar based on the national electrical code. Article 250 covers the grounding requirements for providing a path to the earth to reduce overvoltage from lightning, and the bonding requirements for a lowimpedance fault current path back to the source of the electrical supply to facilitate the opera tion of overcurrent devices in the event of a ground fault. One of the most misunderstood and confused concept is difference between bonding, grounding and earthing. Generic telecommunications bonding and grounding earthing for customer premises standards and publications are adopted by tia in accordance with the american national standards institute ansi patent policy ansinecabicsi 6072011. It is also better to use field signals as current signals 0 to 20 ma or 4 to 20 ma instead of. Electrodes must be at least 20 feet in length and consist of one or more. Power, grounding, bonding, and audio for ham radio safety, hum, buzz, and rfi jim brown k9yc. Temporary power generation and electrical distribution grounding, bonding and the creation of an effective ground fault current path is the backbone of electrical safety and shock prevention in temporary power generation and electrical distribution system installations based on the 2017 national electrical code.
However, a lowimpedence ground can create problems if good installation bonding practices are not followed. This seminar is the first in a short series of electrical grounding and bonding webinars presented by neca. It is for the electrical contractor who intends to be in business next week, next year, and in the years to come. Electrical grounding and bonding based on 2014 nec. Such coupling meets the requirements of the applicable ul conduit standard. Few topics generate as much controversy and argument as that of grounding and the associated topics of surge protection, shielding and lightning protection of electrical and electronic systems.
Practical grounding, bonding, shielding and surge protection ebook written by g vijayaraghavan, mark brown, malcolm barnes. Earthing and grounding are actually different terms for expressing the same concept. Grounding, bonding and the creation of an effective ground fault current path are critical aspects of. Written in accordance with the 2014 national electrical code, electrical grounding and bonding, fourth edition, features complete, uptodate coverage of article 250. Grounding is essential in electrical system to safe guard the electrical devices and persons from the high voltage surges. Take free online practice test on grounding and bonding. Practical earthing, bonding, lightning and surge protection.
Practical grounding bonding shielding and surge protection. Grounding and bonding for communications 27 05 262 c. Here, ill focus on the goal of corrosion mitigation and stick to the term bonding. Grounding and bonding for alternate energy systems 18. Practical earthing grounding, bonding, lightning and surge. Electrical systems and equipment are grounded, usually at the source or service. Basics of electrical grounding earthing and bonding free download as powerpoint presentation. Download for offline reading, highlight, bookmark or take notes while you read practical grounding, bonding, shielding and surge protection. Electrical system grounding that is connected to earth will limit the voltage imposed by which of the following.
Location of the service grounding connection proper sizing of grounded neutral conductors typical rules to be applied rules for multiple services to one building rules for low impedance and high impedance systems rules for bonding requirements at building service equipment grounding electrodes, systems and conductors. Practical grounding, bonding,shielding and surge protection training in london uk, dubai united arab emirates, kuala lumpur malaysia, istanbul turkey, france paris courses list courses categories. Grounding and bonding theory quiz 1 electrician practice tests. Applied grounding and bonding 1 introduction this presentation is a representative sample from the following chapters of applied grounding and bonding. Although not specifically discussed in this article, nfpa 780, standard for installation of lighting protection systems, is a worthwhile reference and includes highly detailed information. Proper, codecompliant grounding and bonding is essential for a safe electrical installation and will serve two principal functions. Bonding is the lasting joining of metallic pieces to form a conducting path which ensures safe electrical continuity. This handbook describes spacecraft grounding architecture options at the system level. Ground crew should stay clear at least 10 feet of pole grounds, ground rods, and guy wires. Topics covered include service, feeder, and branch circuit grounding and bonding, as well as more specialized topics such as grounding and bonding in health care facilities, hazardous locations, and lightning protection. Ar01 grounding and earthing of distributed control systems and power electronic systems grounding and earthing of the cubicles helps in achieving proper performance against the emi. Practical guide to electrical grounding systems and. Principles of electrical grounding john pfeiffer, p.