Requirements for motors, motor components and controllers can be found in a number of articles in the National Electrical Code (NEC), but Article 430 specifically covers motors, motor branch-circuit and feeder conductors and...
The National Electrical Code (NEC) is primarily a prescriptive-based code, meaning it indicates requirements and not what must happen electrically. Performance rules, on the other hand, clarify what must be accomplished elect...
Chapter 4 of the National Electrical Code (NEC), Equipment for General Use, contains 22 articles. Some of the articles include provisions pertaining to switches, receptacles, switchboards and panelboards, industrial control p...
Construction methods have evolved from traditional ways of building and renovation to more efficient and cost-effective techniques. The construction industry now has the ability to model projects remotely and prefabricate man...
A new report from the NFPA Fire & Life Safety Policy Institute, titled " Falling Behind on Electrical Safety ," states that, between 2010 and 2014, an average of over 61,000 fires in the U.S. were attributed to electrical fai...
Jim Dollard has an extensive background in codes and standards. If you have a query about the National Electrical Code (NEC), Jim will help you solve it. Send questions to codefaqs@gmail.com . Answers are based on the 2017 NE...
Each National Electrical Code (NEC) revision cycle seems to result in a multitude of changes in Article 210, Part III, which covers required lighting and receptacle outlets. There are so many changes in each new Code that ele...
Jim Dollard has an extensive background in codes and standards. If you have a query about the National Electrical Code (NEC), Jim will help you solve it. Send questions to codefaqs@gmail.com . Answers are based on the 2017 NE...
Article 110 in the National Electrical Code (NEC) is the second of only two articles in Chapter 1; the first is Article 100, Definitions. Article 100 contains only those definitions essential to the application of the NEC. It...
What is a “UFER “ground? This common question is worthy of a detailed explanation. “UFER” ground is slang for what the National Electrical Code (NEC) addresses as a concrete-encased grounding electrode. While the term “UFER”...
AFCI protection is vital to overall home safety, but the complex technology can often present challenges. Oct. 13, 2017, Leviton and Electrical Contractor teamed up to produce a free webinar about the latest code requirements...
Requirements for electrical wiring in hazardous (classified) locations are more restrictive than in the rules for wiring in general types of occupancies. Section 90.3 provides National Electrical Code (NEC) users with a road...
The scope in article 110 of the National Electrical Code (NEC) states the article covers general requirements for the examination and approval, installation and use, access to and spaces about electrical conductors and equipm...
Does the National Electrical Code (NEC) recognize reconditioned electrical equipment, and is such equipment safe? There are many different considerations in this question, and the acceptance of reconditioned electrical equipm...
Jim Dollard has an extensive background in codes and standards. If you have a query about the National Electrical Code (NEC), Jim will help you solve it. Send questions to codefaqs@gmail.com . Answers are based on the 2017 NE...
On Mar. 7, 2018, at 2 p.m. EST, ELECTRICAL CONTRACTOR and Legrand partnered to present a free webinar, "Meeting Code With GFCI Receptacles." The recording is now available here to view for free. There are several solutions av...
In layman's terms, a retrovirus is a virus that inserts a DNA copy of its genome into the host cell to replicate and is very hard to kill. The life cycle continues on ... and on ... and on. Here in the electrical world, we ex...
Two sections in the National Electrical Code (NEC) provide methods of calculating loads for existing installations. One deals exclusively with existing dwelling units, while the other deals with any existing dwellings, commer...
In the 2014 National Electrical Code (NEC), the voltage threshold was raised from 600 volts (V) to 1,000V in a number of places. Article 490, called “Equipment Over 600 Volts” in 2011, became “Equipment Over 1,000 Volts” in 2...
Jim Dollard has an extensive background in codes and standards. If you have a query about the National Electrical Code (NEC), Jim will help you solve it. Send questions to codefaqs@gmail.com . Answers are based on the 2017 NE...
