Systems

 

 

Integrated electrical and low-voltage systems of all types—inside and outside a building—encompass the range of work that electrical contractors do. The articles in this section highlight different types of work, from security, fire and life safety, to traditional electrical power and distribution, to lighting, cabling and more. 

In the past year, fiber optics underwent some important developments, some technical and some market-related. For those of you working in fiber optic network design and installation, the changes present opportunities and challenges.


This article is the first in a series that provides a step-by-step approach for performing arc flash calculations.
 Arc flash studies and software


I often give my power quality (PQ) 101 course to new engineers or salespeople. This introduction starts with the basics: an overview of PQ phenomena based on IEEE 1159 Table 4.2 followed by Ohm’s and Kirchhoff’s laws and how they apply to power quality.

We strive to protect building occupants, including our employees. Many years ago, the Occupational Safety and Health Administration (OSHA) formed to codify regulations in the area of employee protection.


More on Systems

 
Construction IT--Where Now?

The dot-com nuttiness is over. Were there doubt about that, it was confirmed at the A/E/C Systems 2002 show in June in Anaheim, Calif. There were a few dot-coms, but for the most part, exhibitors--and speakers at construction industry sessions--were moving on.


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Card Access with All the 'Smarts'

In access control, the innovation never stops. In the cards themselves and the readers, technology has stepped up to provide the highest levels of security ever.


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Fiber's Biggest Enemy

Your mother was right--dirt is bad. Cleanliness can be next to impossible on the jobsite, but when it comes to fiber optics, it's mandatory. The problem is simply that fiber itself is small, about the size of a human hair.


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Simultaneous Disconnects, Generator Wiring and More
by Staff |

CODE CITATIONS Article 100 Definitions Article 210 Branch Circuits Article 230 Services Article 250 Grounding Article 312 Cabinets, Cutout Boxes and Meter Socket Enclosures Article 445 Generators Article 518 Places of Assembly Disconnect for multiwire branch circuit Q: There was a requirement in the


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TIA Approves Category 6

After almost five years in the making, Category 6 is—believe it or not—now an official standard, having been approved and published.


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Why Deregulation Failed--And What Comes Next

The government’s deregulation of five major industries—airlines, telecommunications, cable television, banking and electricity—has harmed customers far more than helped them, according to a study released by Consumers Union.


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Renewable Energy--Untapped Resource

Federal energy policy now includes emphasis on increasing electric generation from renewable resources. These usually include bioenergy, hydrogen, ocean, wind, solar, geothermal and hydropower resources.


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