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: Voltage and current transients during switching

Engineers in a large electric utility’s power quality (PQ) department had installed PQ monitoring to determine the source of a system component’s failures. They needed to see the voltage and current waveforms before, during and after the cap banks were switched in and out.

Six years ago, with no experience as an internet service provider (ISP) or telecom service provider, Google Fiber generated an immense amount of excitement by announcing that the company was going to build a gigabit-speed fiber-to-the-home (FTTH) network for Kansas City, Mo., a city chosen from more

Access control is one of the most prevalent and longstanding methods of securing entrances, exits and areas within protected premises.

Appetite for intelligence


The simplicity and ubiquity of home automation means opportunity for ECs. For one thing, today’s systems come ready to install, and contractors can learn installations in a matter of hours rather than weeks. For many ECs, it has been a welcome transition.


More on Systems

 
Wi-Fi Tops iPod and Home Phone

THE WI-FI ALLIANCE, in conjunction with Kelton Research, has found that Wi-Fi is demonstrating increased momentum as an integral part of leisure and work activities. According to a new nationwide survey on consumer perceptions of Wi-Fi technology, the Wi-Fi lifestyle has reached iPod popularity.


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A Contractor's Guide to RFID

What it can do for your bottom line  


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VoIP Lockdown

A secure connection is needed for voice over Internet protocol success


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Wi-Fi Adoption Gains Momentum in China, VoIP Exports to Top 22 Million

THE ENTERPRISE MARKET FROM WI-FI technology in China is expected to increase fourfold over the next three years, with a 45 percent annual growth rate for the market as a whole, according to a new white paper sponsored by the Wi-Fi Alliance.


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Composite Cables

Immunity to EMI makes copper-fiber cable attractive We marveled at photos of the Titanic taken by the team headed by Dr. Robert Ballard, who located the shipwreck in 1986. But how many of us realized the photos were made possible by a special type of fiber optic cable?


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One-Third of U.S. Households Broadband Enabled

ROUGHLY ONE-THIRD of U.S. households now subscribe to some type of broadband service, reports In-Stat, a Scottsdale, Ariz.-based market research firm. As broadband becomes more commonplace, Internet use is evolving with broader adoption of a variety of applications.


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