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. 

Figure 1: Typical magnitude of voltage sag as percent of nominal compiled of EPRI DPQ Project in 1990s

A customer recently called me about the information on his power quality monitor screen. He said about a dozen different events were showing up, but the lights had just blinked once. He wanted to know what all of the other nonsense was supposed to tell him.

Last month, I wrote about how fiber was being used to expand bandwidth for cellular systems, connecting cell towers to the phone network and antennas on the tower to the base electronics. That helps our phone coverage when we’re driving or walking outside.

Workflow-management tools are designed to orchestrate everyday business processes. For example, a contractor may implement a process for submitting, reviewing and approving expense reports.

While the electric power industry rapidly changes, utilities and building owners will need to accurately model the engineering and economic operations of the power system to make informed decisions, so they require sophisticated modeling-software tools.


More on Systems

 
Reverse Auctions and Construction - Online Bidding Has Promise and Problems
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In reverse actions, also knows as "online auctions," " e-sourcing," and "e-procurement," buyers use the Web to drive prices down. If this concept is new to you, it might sound weird. An auction might be held after a company goes bankrupt and sells off its possessions, including desks and computers.

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Installing Fire Alarm Systems - Part I: A Quick Guide To Getting Started In The Business
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Many electrical contractors have attempted to install commercial fire alarm systems and because they were not properly prepared, they did not enjoy the experience. What steps do you take to properly install such a system?

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Fiber Optic Update - A Peek At The Future, A Look At The Past
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The beginning of the year is always a good time to reflect on the past and contemplate the future. Except in fiber optics. It is hard to get people to look back, as the last year and a half has been pretty painful for many in fiber.

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Contractors Should Learn About Wireless LANs - They're No Longer Cost-Prohibitive
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Just yesterday, or so it seems, wireless technology meant nothing more than cell phones. In fact, it may be that the whole love affair with all things wireless truly began with pagers. Remember when everybody and their brother had one? Don’t you wonder where they all went?

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Fiberoptic Cabling May Have Bottomed Out
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By Rick Laezman Like many high tech products over the last few years, fiberoptic cable has experienced a roller coaster ride of extreme highs and lows. 2001 was a peak year for installations of single- and multi-mode fiberoptic.

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IT Professionals Concerned about WLAN Security
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Ft. Lee, New Jersey, Nov. 11, 2002––ReefEdge, Inc., an industry leader in wireless network infrastructure solutions, today announced the results of a Wireless LAN (WLAN) survey of 935 IT professionals conducted via the company's website. Wireless LANs were widely deployed among the respondents.

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Popularity of Green Power Growing in the Northwest
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By Rick Laezman When given the choice, a growing number of retail customers in the Northwest prefer renewable energy to fossil fuel generated power.

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