Mike holts illustrated guide to grounding versus bonding. While it may seem that the neutral and ground are the same, their purposes are entirely different and must be addressedinstalled as such. One of the most confusing areas of the trade continues to be grounding and bonding. Electrical code expert mike holt discusses terminating the grounding electrode. New mexico construction industries division electrical bureau continuing education list of approved courses course title sponsor course type course number expiration date office location phone email webpage classification open to public hours page 1 of 16 revised 15 march, 2017 jkh.
One of the most confusing areas of the trade continues to be bonding and grounding. Bonding belongs in the hands of every electrician, inspector, and engineer who needs to understand the, seemingly conflicting, information of how to properly apply the nec rules of grounding and bonding. In bonding, the emphasis is on creating lowimpedance electrical connections between two or more conductive metallic bodies that are not normally currentcarrying. Bonding is more clear word compare to grounding and earthing, but there is a micro difference between grounding and earhing. Mike holt s illustrated guide to nec requirements for bonding and grounding belongs in the hands of every electrician, inspector, and engineer who needs to understand the, seemingly conflicting, information of how to properly apply the nec rules of grounding.
Grounded system refers to a system where a conductor is grounded and is intended to or may carry current in the normal operation. Mike holt s illustrated guide to bonding and grounding textbook, 2017 nec. Mike holt s illustrated guide to nec requirements for grounding vs. An arcfault circuit interrupter is a device intended to deenergize the circuit when it detects the current waveform characteristics unique to an arcing fault. Mike holt enterprises the leader in electrical training. Mike holt s illustrated guide to grounding versus bonding article 250, based on 2005 nec wanswer key mike holt on. Article 250 grounding and bonding introduction to article 250grounding and bonding no other article can match. Difference between grounding and earthing one of the major difference between the grounding and the earthing is that in grounding, the current carrying part is connected to the ground whereas in earthing the noncurrent carrying parts is connected to ground. See all books authored by mike holt, including mike holts illustrated guide to electrical nec exam preparation, and mike holts illustrated guide to understanding the national electrical code, based on the 2005 nec volume 1 wanswer key, and more on. Mike holt s illustrated guide to 2014 nec requirements for grounding vs.
Grounding and bonding can be considered one of the most confusing areas in the electrical trade. Why not equipment grounding and equipotential bonding. No other article can match article 250 for misapplication, violation, and misinterpretation. The extensive graphics show current flow in both normal. Electrical theory has been applied to this difficult to understand article, making it easier for students to grasp the concepts of grounding and bonding. Mike holt of mike holt enterprises spoke for 5 minutes regarding his pis, 1 minute.
Article 250 grounding and bonding mike holt enterprises. Sensitive electronic equipment fips94 1 2399 7 mb pdf this is excellent publication. Visit to explore mikes complete range of 2017 nec training products. Control and relay panel wiring diagram pdf pin by diagram bacamajalah on tips references in 2019. Difference between grounding and earthing with comparison. Mike holt s journeyman simulated exam, 2011 nec, electrical. Mike holt s illustrated guide to grounding versus bonding 2011 edition wanswer key mike holt on. The grounding and bonding requirements in this column apply to solidly grounded systems that operate at not more than 600v, such as 120240v, 120208v, and 277480v.
Grounding and bonding part 1 of 2 electrical code, ac. The neutral on a wye system is a prime example of a grounded conductor. Staticsure lind equipment ltd verifying a static ground between the bar and barrel using lug an reb ip clamp click picture for larger image. New mexico construction industries division electrical. Bonding one of the most confusing areas of the trade continues to be grounding and bonding. This seminar is the first in a short series of electrical grounding and bonding webinars presented by neca. Mike holt s illustrated guide to nec requirements for bonding and grounding belongs in the hands of every electrician.
Bonding part 1 of 2 knderstanding the nec equirements for grounding vs. Grounding versus bonding textbook is loaded with detailed colorcoded graphics so you can easily differentiate between grounding and bonding. Earthing and grounding are actually different terms for expressing the same concept. 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. The national electrical code nec covers grounding and bonding in several articles. Gfci protection is required for all 15a and 20a, 125v receptacles located in a dwelling unit boathouse. He was a journeyman electrician, master electrician, and electrical contractor.
Equipment grounding vs system grounding equipment grounding establish connect a conductive path between normally noncurrent carrying metal parts of equipment and between these parts and the grounding electrode system grounding deliberate connection between a circuit conductor of a power source and ground earth. Mike holts illustrated guide to changes to the nec 2017 by. Mike holt s illustrated guide to electrical exam preparation, based on the 2017. Cross references to related code requirements help you understand how the code rules relate to one another. Jun 1, 2018 article 250 provides the requirements for grounding and bonding. Lightning protection product details ground rod detail pdf. Mastering the nec 2011 series mark shapiro mike holt. Grounding safety lightning protection product details ground rod detail pdf mike holt grounding vs bonding nec requirements for sample graphic. Ideally, except in special cases where isolation is necessary, bonding of all conductive materials should be the goal. New mexico construction industries division electrical bureau continuing education. All code references are based on the 2005 national electrical code.
Distribution board layout and wiring diagram pdf new home wiring diagram thebrontes. Cmp 5 asks the correlating committee to refer a series of frs related to grounding and bonding of equipment connected to the supply side of the service disconnecting means to codemaking panel 5 second draft meeting agenda october 25 27, 2018. Grounding and bonding grounding and bonding national. Mike holts illustrated guide to understanding the nec. Because proper grounding and bonding is essential to most power and safety issues, the topics covered in this seminar are vital to all professionals within the electrical industry. Mike holt grounding vs bonding and textbook sample graphic last maryland safety inspection certificate ru maryland safety inspection certificate simple mike holt grounding vs bonding and textbook sample graphic ne6833 from the thousand images online with regards to maryland safety inspection certificate.
The conductor on the supply side of the separately derived system overcurrent protection device that. Mike holt s illustrated guide to understanding 2011 nec requirements for grounding vs. Even the codes have been misusing the terms for years, and this has amplified much of the. Learn grounding purpose of system and equipment grounding with code expert mike holt in this excerpt from his bestselling library understanding nec requirements for grounding vs. Bonding 2014 by mike holt based on the 2014 nec mike holt s illustrated guide to nec requirements for grounding vs. Mike holts illustrated guide to 2014 nec requirements for. Some of the applicable code sections are listed at the end of this section. Visit to explore mikes complete range of 2014 nec training products. Understanding nec requirements for bonding and grounding 2017 by mike holt based on the 2017 nec mike holt s illustrated guide to nec requirements for bonding and grounding belongs in the hands of every electrician, inspector, and engineer one of the most confusing areas of the trade continues to be grounding and bonding. Grounding and bonding grounding and bonding national electrical code article 250 by jim biesterveld some of the material is taken from mike holt and. Mike holt enterprises offers comprehensive electrical training materials delivered in a logical, easy to understand format that helps build a solid understanding of electrical concepts. A pdf copy of this nema policy is attached and may also be found. In 1974, mike realized there was a need for quality electrical training and opened mike holt. National electrical code codemaking panel 5 nfpa 70 second.
Look in panel and the panel is not bonded, no bonding screw or jumper. Background information for each change along with explanations, which are delivered in mikes trademark style easytounderstand. Mike holts illustrated guide to grounding vs bonding. Grounding vs bonding series by mike holt free download as pdf file. Objectionable neutral current on metal parts can cause elec tric shock, fires, and the improper operation of electronic equipment and overcurrent protective. Many people simply do not understand the difference between grounding and bonding, and they dont understand why theyre doing it, says mike holt, national electric code nec consultant and industry expert, mike holt enterprises. Grounding and bonding electric current power physics. My first question is why in article 680 is there the continuous use of the words. For over 40 years mike holt enterprises has been providing quality electrical code training to help electrical professionals learn the code, prepare for exams, and improve their electrical. Grounding electrode system and grounding electrode conductor 2. The bonding conductors or jumpers shall be sized in accordance with table 250. Mike holt s grounding and bonding seminar 08252018. Maryland safety inspection certificate simple mike holt.
Mike holt worked his way up through the electrical trade from apprentice electrician through electrical contractor, to become one of the most recognized experts in the world as it relates to electrical power installations. Groundingandbonding nationalelectricalcode article250 byjim. Mike holt electrical training and exam prep products 2017. This text gets to the root of all problems associated with grounding and bonding. Mike holt s illustrated guide to nec requirements for bonding and grounding belongs in the hands of every electrician, inspector, and engineer who needs to understand the seemingly conflicting information of how to properly apply these particular nec rules. Mike holt s bonding and grounding textbook, 2020 nec. Apr 12, 2016 grounding and bonding as electrical installation protocols overlap to a certain extent, but they are not identical. What does bonding bonded mean and what does nec say about it. In part 1 of this twopart series, our focus turns to how the 2014 nec revisions affect grounding. Mike holts illustrated guide to understanding nec requirements for grounding vs. Mike holts illustrated guide to nec requirements for grounding vs.
Watts up what is a floating power supply output that means neither the positive terminal nor negative connected to earth chassis ground see figure. One of the most misunderstood and confused concept is difference between bonding, grounding and earthing. Mike holts illustrated guide to bonding and grounding. What is the difference between bonding, grounding and earthing. Swimming pool bonding touch potential 2wire circuit open neutral 2wire circuits excel spreadsheet. Based on the 2011nec, this exam covers thenec, electrical theory, and electrical calculations. Grounding separately derived systems the rules for establishing the grounding electrode system for a separately derived system are very similar to the rules for the grounding of services. Equipment grounding conductors do not appear to be bonded to the panel. Mike holts most popular book is mike holts illustrated guide to basic electrical theory 3rd edition. Mike holt grounding vs bonding nec requirements for sample graphic. Bonding wire for hot cold pipes on a water heater nj.
Mike holt electrical training and exam prep products. Johnston neca executive director, standards and safety 1 welcome to a neca webinar based on the national electrical code. Groundingandbonding nationalelectricalcode article250 by. Nov 14, 20 learn grounding safety fundamentals with code expert mike holt in this excerpt from his bestselling library grounding vs. Grounding recommendations for on site power systems. Understanding nec requirements for bonding and grounding 2017.
Understanding nec requirements for bonding and grounding 2017 by mike holt based on the 2017 nec mike holt s illustrated guide to nec requirements for bonding and grounding belongs in the hands of every electrician, inspector, and engineer. Nih standard cad details thumbnail of e isolated ground receptacle wiring diagram. Bonding belongs in the hands of every electrician, inspector, and engineer one of the most confusing areas of the trade continues to be grounding and bonding. Mike holts illustrated guide to understanding 2011 nec requirements for grounding vs. Mike holt s illustrated guide to grounding versus bonding article 250, based on 2005 nec wanswer ke.
1104 1213 691 418 820 444 1287 300 1101 22 200 1425 885 1388 1514 31 183 860 343 1511 486 866 1513 217 510 419 1387 916 1510 676 241 1327 281 1039 86 439 637 604 597 149 1240 1136 1313 418 314 785 143 223