While selecting the correct size conductor is not difficult, more is involved than selecting a conductor based solely on the ampacity shown in Table 310.15(B)(16) in the National Electrical Code (NEC).
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.
If you have a problem related to the National Electrical Code (NEC), are experiencing difficulty in understanding a Code requirement, or are wondering why or if such a requirement exists, ask Charlie, and he will let the Code decide. Questions can be sent to email@example.com.
Although the 2013 edition of the National Fire Alarm and Signaling Code contains 15 chapters and nine annexes, I find many contractors, designers and authorities having jurisdiction reference only one or two chapters when deciding what requirements will affect their fire alarm system design, install
In the March 2012 Electrical Contractor, I mentioned the increased number of receptacles in patient bed locations with a minimum of 14 receptacles in a Category 1 critical-care area and 36 receptacles in a Category 1 operating room for the 2014 National Electrical Code (NEC), based on changes in the
Recently, while attending a lunch-and-learn presentation from one of the better local distributors of fire alarm systems, we wound up discussing the quality of fire alarm system submissions from contractors.
Many electrical designs incorporate parallel arrangements. The National Electrical Code (NEC) requires parallel conductors when supplying large switchboards and other large electrical equipment because large single conductors are not practical, economical or even available in many cases.
A new national energy standard took effect on Dec. 30, 2010. On that day, all states had to certify to the U.S. Department of Energy (DOE) that they had a commercial building energy code in place at least as stringent as ASHRAE/IES 90.1 2004 or justify why they could not comply.