The 2014 National Electrical Code (NEC) process received more proposals—including a total of 45 generated by the NEC Correlating Committee Task Group on direct current (DC)—and comments to insert DC into the Code than any other NEC cycle in history.
A friend of mine recently called with a question about the cover depth requirement for an underground 120-volt (V) lighting circuit installation in rigid polyvinyl chloride (PVC) conduit supplying a wet-niche luminaire in a swimming pool.
“Motor contribution” is only used in 240.86(C) in the National Electrical Code (NEC), but the NEC does not define it anywhere. A full explanation of this important electrical application is located in other publications, such as fuse and circuit-breaker protection books and articles.
As we enter the fall, crops are ready for harvest, the leaves on trees are turning color, the evenings have a slight chill, baseball season is nearing an end, football season is just getting started, and we have a new 2014 National Electrical Code (NEC).
I was involved recently in a discussion on lightning protection for various types of buildings and what standards applied to those installations or if the installations required compliance with NFPA 780, Standard for the Installation of Lightning Protection Systems; UL 96A, Standard for Installation
Many of the articles that I write for this magazine originate as questions that I receive as I travel, by phone, or come to me as emails. I can answer some of these questions very easily without much controversy by a simple reference to the National Electrical Code (NEC).
In the 2011 and previous editions of the National Electrical Code (NEC), installing low-voltage lighting in close proximity to the edge of a swimming pool was a Code violation, yet almost every backyard swimming pool with a landscaped yard has low-voltage lighting too close to the pool’s edge.
Article 424 in the National Electrical Code (NEC) addresses fixed electric space heating equipment, stating, “for the purpose of the article, heating equipment shall include heating cable, unit heaters, boilers, central systems, or other approved fixed electric space-heating equipment.” Since the sc
In the 2005 National Electrical Code (NEC) process, proposals were submitted to change the phrase “equipment grounding conductor” to “equipment bonding conductor” wherever the phrase existed throughout the NEC.