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...
Article 430 in the National Electrical Code (NEC) covers motors, motor branch-circuit and feeder conductors and their protection, motor overload protection, motor control circuits, motor controllers, and motor control centers...
I have written a couple of articles about NFPA 4, Standard for Integrated Fire Protection and Life Safety System Testing, in the past. The last one in December was about getting it referenced in the model codes to make its...
The National Electrical Safety Code (NESC) is published by the Institute of Electrical and Electronics Engineers (IEEE). The latest edition is designated as ANSI C2 2017. This article examines the basics of the NESC relative...
Both the National Electrical Code (NEC) and NFPA 70E, Standard for Electrical Safety in the Workplace, use the phrase “arcing current.” It is located in 240.87(B)(5) and (B)(6) in the NEC and in many places within NFPA 70E....
An old Grateful Dead lyric sums up the last 16 years of developing the next edition of IEEE 1584, IEEE Guide for Performing Arc-Flash Hazard Calculations: “What a long, strange trip it’s been.” Truer words have never been...
Last week, the board of directors of the International Code Council announced the establishment of a new ad hoc committee to comprehensively explore and assess building safety and security. "Building safety is an issue of...
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...
Can a manual transfer switch, a trapped key interlock system (commonly known as a Kirk Key system), an emergency automatic transfer switch and a permanently mounted generator be used at an industrial installation to provide...
Whether performing a load calculation for hundreds of motors in an industrial plant or installing a swimming pool pump in a single-family dwelling, it is important to reference provisions and tables in Article 430 of the...
Generators are commonly installed for buildings or structures requiring emergency systems, legally required standby systems or optional standby power systems. In many designs, the generator is located outside the building or...
The International Code Council (ICC), the Solar Rating and Certification Corp. (ICC-SRCC) and the National Fire Protection Association (NFPA) have teamed up to release the 2018 International Solar Energy Provisions (ISEP)....
The National Electrical Code (NEC) is the most important and comprehensive document created for the practical safeguarding of persons and property from the use of electricity and its hazards. Right now, the 2020 edition is...
Electrical systems age, usage increases and people upgrade their homes and offices. This combination is pushing many electrical systems to their limits. Enhancing a home or office’s electrical service requires an informed...
Recently, a question came up about applying the National Electrical Code (NEC) to achieve minimum compliant overcurrent protection for a general motor circuit to protect both the motor and conductors. This column reviews the...
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...
In 2015, I wrote an article about 680.22(B)(6), a change adopted in the 2014 NEC that allowed light fixtures to be installed around the water's edge contingent upon certain restrictions. At the time, I couldn’t find a low...
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...
General requirements for conductor connections, terminations, splices and terminal temperatures are covered in 110.14 of the National Electrical Code (NEC). Since 1990, there have been some very substantial changes in 110.14...
Article 430 in the National Electrical Code (NEC) covers motors, motor branch-circuit and feeder conductors and their protection, motor overload protection, motor control circuits, motor controllers, and motor control centers...
