Electrical grounding is the process of removing excess charge on an object by transferring electrical charges from a short circuit between this object and another larger object. Grounding and bonding as electrical installation protocols overlap to a certain extent, but they are not identical. Bonding and grounding for the prevention of fire and. Article 250 contains the following grounding and bonding requirements. Written in accordance with the 2014 national electrical code, electrical grounding and bonding, fourth edition, features complete, uptodate coverage of. This is followed by a discussion of the objectives of equipment grounding and bonding, including minimizing electric shock hazard to personnel, providing adequate. Groundingandbonding nationalelectricalcode article250 by. Grounding electrode system and grounding electrode conductor part iii znec 250. Electrical grounding and bonding, simmons, phil, ebook.
Nfpas 2011 electrical grounding and bonding video facilitates training new employees and is an excellent refresher course for experienced professionals. 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. One of the most misunderstood and confused concept is difference between bonding, grounding and earthing. Madisons extensive line of quality grounding, bonding and splicing products prove that we understand it as well. Understanding the differences between bonding, grounding.
Bonding limits the touch voltage when noncurrentcarrying metal parts are inadvertently energized by a ground fault. Jim brown, k9yc, sent this photo of grounding jumpers green wires in the back of a nice portable station built by glen brown, w6gjb, for the california qso party. Section 26 05 26, grounding and bonding for electrical systems. Grounding electrode system refers to grounding electrode conductors and all electrodes required or allowed by nec, as well as made, supplementary, and lightning protection. Click download or read online button to get electrical grounding and bonding book now. The importance of bonding and grounding in commercial, industrial, and institutional buildings cannot be overstated. The grounding device shall be removed from the normally energized conductor, line or equipment first. Where a dielectric main water fitting is installed, connect grounding conductor to street side of fitting. This userfriendly, practical guide provides a thorough and effective introduction to the essentials of electrical grounding and bonding. Grounding and bonding grounding is the process of connecting a system, equipment, or both to the earth. Grounding and bonding for electrical systems on photo. Effective groundingbonding for fire prevention ground all containers for extra safety in the handling of containers of flammable liquids having high electrical resistance and low flash points, possible loss of life, loss of property and interruption to business can be greatly minimized by effective grounding and bonding of the containers. Milhdbk419a preface this volume is one of a twovolume series which sets forth the grounding, bonding, and shielding theory for communications electronics ce equipments and facilities.
This new animation illustrates the dangers of static build up on tanker trucks during the transfer process in hazardous area industries. Electrical grounding and bonding download ebook pdf. With this experience, erico is a world leading authority in the design and construction of permanent, low impedance. Specification standard grounding and bonding 27 05 26 the university of new mexico 802 yale blvd. There is no longer a hierarchy of electrodes that must be used for grounding separately derived systems. Electrical grounding and bonding, 4e a userfriendly, practical guide provides a thorough and effective introduction to the essentials of electrical grounding and bonding. Other rack designs contain provisions to create electrical continuity via grounding washers as the units are assembled in the field see figure 3. We offer an array of ul listed products, ensuring that no matter what conductor size, madison has what you need to meet all. This section provides an overview of the pri nciples involved in the design and maintenance of electrical bonding and grounding. The interconnection and grounding of the non electrical metallic elements of a system is covered first. Bonding provides the safety during fault current and.
Bonding is more clear word compare to grounding and earthing but there is a micro difference between grounding and earhing. 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. Rigid steel conduit runs are bonded together in handholes by a solid 6 awg bare copper wire attached to the lug on thread bushings which are installed on the. In bonding, the emphasis is on creating lowimpedance electrical connections between two or more conductive metallic bodies that are not normally currentcarrying.
Ieee recommended practice for equipment grounding and. For sizing any bond conductor required on the load side of fuses or circuit breakers. Electrical grounding and bonding educational pdf document. Learn more about newson gales comprehensive range of static grounding and bonding solutions. For bonding and grounding to be effective, a metaltometal connection must be maintained between the bonding and grounding wires and the containers. Connect grounding conductors to main metal water service pipes by grounding clamp connectors. Bonding or grounding connections are made directly to a flat surface of basic structure, or to a cylindrical surface of basic structure. Practical, userfriendly and updated to reflect the 2020 national electrical code, simmons electrical grounding and bonding, sixth edition delivers complete coverage of grounding and bonding requirements in both article 250 and chapter 5 of the nec. Article 250 grounding and bonding mike holt enterprises. Byron kirby explains grounding, bonding, the difference, and the correct application for both.
Electrical bonding is the practice of connecting metallic objects that may be exposed to electrical faults or induced voltages to the grounding conductor. The connection between the grounded circuit conductor and the equipment grounding conductor at the service. Completely updated to reflect the 2017 national electrical code, electrical grounding and bonding, fifth edition, features complete, current coverage of grounding and bonding requirements in both article 250 and chapter 5 of the nec. Soares grounding and bonding, nec2014 pdf view product soares grounding and bonding, nec2011 view product. Computer and rackmounted electronic equipment circuits. 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. This can occur when materials are rubbed together, such as. Grounding and bonding free download as powerpoint presentation. Bonding ensures safe electrical continuity while grounding ensures that all metal parts of an electrical circuit that an individual might contact are connected to the earth, thus ensuring zero voltage. To reduce the chances of your antenna or mast being struck by lightning, follow the national or local electrical codes to properly ground these items during installation. Antenna grounding information outdoors why its important. Electrical earthing grounding systems a technical report and a short course technical report pdf available february 2018 with 15,508 reads how we measure reads.
However, if rapid flow rates are used to transfer the liquid into a storage tank or container, high electrical potentials can occur on the surface of the liquid in the tank. Bond metal grounding conductor conduit or sleeve to conductor. Principles of electrical grounding john pfeiffer, p. Grounding electrode system utility transformer service conductor service disconnect feeder branch circuit subpanel main bonding jumper 250. Its a timesaving and effective way to conduct grounding and bonding training based on your companys projects and timeframe.
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. The proper bonding and grounding of the system is often enough to control this static buildup. This course covers earth grounding, equipment grounding, and high resistance grounding. In addition, noncurrentcarrying metallic components in a facility, such as equipment cabinets, enclosures, and structural steel, need to be. Justrites guide to safe grounding and bonding practices their safety is essential. Electrical grounding and bonding fundamentals explained by pablo diaz, p. Temporary power generation and electrical distribution. The grounded circuits of machines need to have an effective return path from the machines to the power source in order to function properly. Ul 467 grounding and bonding equipment as a means of further certifying their applicability to grounding. Earthing and grounding are actually different terms for expressing the same concept. The new 19th edition of the canadian electrical code has brought about some changes in the grounding and bonding rules. Power, grounding, bonding, and audio for ham radio safety. Section 260526 grounding and bonding 030314 issued for bids 260526 7 building.
Many factors such as soil resistivity variations, installation accessibility, layout and existing physical features are all site specific and tend to affect decisions on earthing methods employed. Electrical grounding and bonding mindtap course list completely updated to reflect the 2017 national electrical code, the fifth edition of this userfriendly, practical guide features thorough, current coverage of grounding and bonding requirements in both article 250 and chapter 5 of the nec. Electrical grounding and bonding fundamentals explained the ef. He is a retired member of the international brotherhood of electrical workers. Inadequate bonding or grounding can lead to unreliable operation of systems, e. We offer engineering experience and technical support that is second to none in the industry. Grounding and bonding electrical engineering centre.
This section specifies the furnishing, installation, connection, and testing of grounding and bonding equipment, indicated as grounding equipment in this section. Equipment grounding conductors shall be ul 83 insulated stranded copper, except that sizes 6 mm. It examines the critical concepts of calculating conductor sizes, reading and interpreting nec tables, the use of grounded conductor. The purpose of this course is to familiarize engineers with electrical system grounding and bonding issues associated with solidly grounded systems under 600v.
Grounding and bonding electrical conductor electrical. This course can serve as an introduction to grounding and bonding for engineers with little or no professional electrical design experience. The technical information provided herein is to assist qualified. Manufacturer regularly engaged, for a minimum of 5 years, in the manufacturing of threaded fasteners used in grounding and bonding for electrical systems. This site is like a library, use search box in the widget to get ebook that you want. Static electricity is an everpresent and significant ignition risk for operations conducted in flammable. Water heater, heattracing, and antifrost heating cables. Written in accordance with the 2014 national electrical code, electrical grounding and bonding, fourth edition, features complete, uptodate coverage of article 250. It explains the differences between all three grounding systems, emphasizing the critical function that equipment ground performs.
Typical ground resistance requirements which one to follow. Where the national electrical code nec has been enacted into a jurisdictions body of law, it mandates every aspect of electrical installations from the point of view of safety. The bonding conductor is permanently and directly connected to the electrical service equipment enclosure, the. When an additional grounding electrodes is used for the gas service, it shall be bonded to the. When transferring flammable liquids, it is important that the containers involved are bonded and grounded to prevent static electricity from igniting the vapors. Bonding is achieved by using a wire while grounding is achieved by using a rod. This is followed by a discussion of the objectives of equipment grounding and bonding, including minimizing electric shock hazard to personnel, providing. Milhdbk419a preface this volume is one of a twovolume series which sets forth the grounding, bonding, and shielding applications for communications electronics ce equipments and facilities. Bonding is the process of connecting to conductive objects together. These bonded objects are usually but not always grounded. Grounding and bonding are important elements of a buildings electrical wiring system. The fundamental purpose of temporary grounding and bonding is to provide a safe path to ground for current, available from induced voltages, switching errors, accidental reenergization or accidental contact with live lines and equipment, thereby keeping workers and the general public from being injured.
In general ce code rule 10206 does not allow a bonding conductor to be used as a grounding conductor. Learn the essentials of electrical grounding and bonding. While grounding and bonding might seem like the same thing, they have some very important differences. Bonding networks for buildings and other structures ges also known as bonding equalizer must be made every other 3 floors and the top floor. There are three types of bolted connection, as follows. 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.
Electrical grounding and bonding based on 2014 nec. Grounding and bonding means that conductive parts are connected together and to the earth. Grounding and bonding alone will not and cannot guarantee absolute protection against electromagnetic em environmental threats. Ideally, components that make up the grounding kits are tested to determine their ability to function during realworld conditions, such as earthquakes, lightning strikes, and ac power faults. What is the difference between bonding, grounding and. Static grounding solutions grounding and bonding newson gale. Electrical grounding and bonding based on 2020 nec. Bonding and grounding of through bolts or screws, where installation has easy access. Simmons serves nfpa on code making panel5 of the national electrical code committee grounding and bonding, and he previously served on the nfpa standards council, the nec technical correlating committee, the iaei, and underwriters laboratories.
Grounding will eliminate static electricity, as well as protect. Earthing grounding of power electronic and distributed. Section 26 05 26 grounding and bonding for electrical systems. Once you have completed your purchase, you will receive an email with a link in the text to go and download your purchase. Metal frame of the building or structure where the following methods are used to make an earth connection. Justrites guide to safe grounding and bonding practices. Bonding tower to house if close to the house, it must be bonded to house ground if distant from house, it should not be bonded to house ground coax shield will provide inductive connection, so most lightning current will go to tower grounds distant 200 ft cable run from base to house. The grounding and bonding of equipment in industrial and commercial power systems is covered in this recommended practice. They each have different functions, but they work together to make the buildings electrical wiring safe. Drawings and general provisions of the contract, including general and supplementary conditions and division 1 specification sections, apply to this section. Otherwise, it is important to use paintpiercing hardware. Electrical grounding and bonding 3e, written in accordance with the 2011 national electrical code, provides readers with a comprehensive introduction to the essential elements of electrical grounding and bonding. Electrical grounding and bonding by phil simmons this userfriendly, practical guide provides a thorough and effective introduction to the essentials of electrical grounding and bonding.