The same hazards exist in dormitories. Ugly's Electrical References book is a popular pocket-sized book used by electricians, engineers, contractors, designers, maintenance workers, instructors, and the military. Compliance with the National Electrical Code is a major concern for today? Mike's dynamic style and detailed graphics easily explain the most difficult subjects. The many changes in Article 690 warrant that the electrical inspector spends a lot more time in this article and have additional study aids and training available. For example, in Chapter 8, first-level subdivision 800.
All meeting rooms of not more than 1,000 square feet in other than dwelling units are now required to have receptacle outlets installed. Say hello to the 2017 National Electrical Code! The original data that was used to establish the dwelling unit service conductor reduction requirements of 310. Each entry, reference and source has been examined for precise detail and ease of use. It was never the intent of the National Electrical Code that swimming pool reinforcing steel be used as a grounding electrode conductor. Work with the latest requirements governing public and private buildings, homes, and structures; outdoor yards and lots; utility equipment; installations that connect to the power grid; and consumer-owned power generation systems and equipment. Lastly, crawl spaces and unfinished portions of basements are not intended as habitable rooms.
The list of locations is expanded to include receptacle outlets in crawl spaces and receptacles in unfinished basements in 210. Clarification is a good thing! The rules in chapters 5—7 can supplement or modify each other in addition to the provisions in chapters 1—4. Trust the nation's leading electrical authorities for information for the latest Code information. It seems that each code cycle, Article 690 changes significantly. Where field-installed in a damp, wet or corrosive environment, all must be composed of copper, copper alloy or stainless steel. See how your jurisdiction wants to assure compliance with this new section.
Code changes help to increase the safety of any electrical installation. However, floor receptacles are required within 6 feet of fixed walls for floor spaces at least 12 feet wide and with total area of 215 square feet. The revisions incorporate numerical categories 1 through 4 following each definition, and the bracketed information contains the location of the extract. This edition provides expanded material on utility power generation and distribution, electrical safety, and guidelines. This new section is also very interesting because if we keep reading we get a lesson on code structure.
Hundreds of updates and five all-new articles pave the way to a safe and efficient electrical future. This new listing requirement was proposed for 320. Understandably, this often leaves some behind, especially when they do not have a text to direct their focus. A substation is defined as an assemblage of equipment e. Basically, this new section states that the swimming pool and the swimming pool steel rebar cannot be used as a grounding electrode conductor. In closing, I wish you all happy and safe wiring! Microgrids are on the rise worldwide. The article now recognizes that many appliances and tools used in dwelling unit garages require a 20A branch circuit.
According to the substantiation, the information necessary to comply with the additional marking on service equipment is obtainable at or before the time of installation. There is an exception to this article for Industrial Occupancies. Visit for this full series. Occasionally, these detached structures are located near in-ground permanently installed swimming pools. Analysis of Changes helps you get up-to-code while you maximize time and efficiency on the job. Basically it is stating that the fuel tank must be separated from property lines, any public way, and buildings on the same property.
Specific language requires parallel conductors to be installed in groups consisting of not more than one conductor per phase, neutral, or grounded conductor to prevent current imbalance in the paralleled conductors due to inductive reactance. This is a new article and it covers certain setback requirements for compressed natural gas, liquefied natural gas, and liquefied petroleum gas. Article 712 — Direct-Current Microgrids A direct-current microgrid dc microgrid is defined as a power distribution system consisting of one or more interconnected dc power sources, dc—dc converters, dc loads, and ac loads powered by dc—ac inverters. With the increasing interest in renewable energy, the electrical industry is tasked to address the safety and operation of these systems. These stations are differentiated from most building-mounted and other decentralized solar power applications in that they supply power at the utility level, rather than to local users.
New text requires connection to switch devices where required beginning Jan. This textbook covers Article 500-820 excluding Article 690 , based on the. New list item 2 provides marking requirements for reconditioned equipment including the responsible organization and date of reconditioning. While a label or marking of available short-circuit current is not required on the motor control center, it may be the most feasible method of complying with this new requirement. I think we should all read it over from time to time so as to keep these requirements fresh in our minds. Determine compliance objectives based on the.
It should be noted that this new language concerning locking support and mounting receptacles for luminaires is an option and not a requirement for mounting luminaires and ceiling-suspended paddle fans. The full-color illustrations help guide you through everything you need to know about calculations and help you review the theory that you will have on your exam. This equipment is required to be listed. Previously, this branch circuit could be rated 15- or 20-ampere. Since the reliability and safety of terminations depend on proper connection, it is essential to require the use of the proper tool. Explanatory icons that help you identify the specifics of each change, along with easy-to-understand explanations. Also, these circuits may only use receptacle outlets.
Detailed instructional images display the Code change in an applied setting. The four 100-question exams in the back of the book help the learner practice answering exam questions and become efficient at looking up Code information. Figure 1: New provisions with additional information have been proposed for arc-flash warning labels. Two new figures provide prescriptive and consistent detail in the required markings. The type of sealants applied must be identified for use with the cable insulation, conductor insulation, bare conductor, shield or other components. Note: There is an exception that allows this garage 20-ampere circuit to also supply outdoor receptacles that are readily accessible. It not only gives you basic answers, but it also teaches you the steps to solve the problems, and how to navigate the National Electrical Code to find the answers quickly and efficiently.