Electrical Contractor Magazine

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. 

Eaton’s Power Xpert multipoint meter

Although submeters have long enabled building owners, multiresidential property managers and facility managers to better control energy consumption and costs, use of the technology has remained steady in about 10 to 15 percent of the commercial and multifamily residential building space.

Last month, I covered the challenges to traditional structured cabling from multimode optical fiber and wireless. Multimode fiber became the favorite cabling for the backbone but never made it to the desktop because every connected device already had a free Cat 5 port.

In this third part of my series on the most common power quality phenomena, I group several IEEE 1159 categories together under the general description of “distortion.” Though one might argue that all power quality phenomena result in distortions of the voltage sine wave, these are the more steady-s

Positioning


About three years ago, security service providers started offering smart security solutions complete with professionally monitored home security services that were enhanced with home automation and energy management capabilities.

Electrical Contractor Magazine

More on Systems

 
Stationary Pump Installation, Grounding and More
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CODE CITATIONS Article 110 Requirements for Electrical Installations Article 250 Grounding Article 408 Switchboards and Panelboards Article 410 Luminaires (Lighting Fixtures), Lampholders, and Lamps Article 430 Motors, Motor Circuits, and Controllers

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Storage Area Networks Take Two Steps Forward
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The latest buzz in the low-voltage market is Storage Area Networks (SANs). SANs began in a mixed environment, and contractors had to deal with different host bus adapters and different configurations. Resolving compatibility problems often involved calls to numerous vendors. That is changing.

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Tune into Wireless
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We’ve come to know it and love it: the wonderful world of wireless. Otherwise known as radio frequency transmission, wireless has gone mainstream, with hands-free and remote capabilities a way of life. If you think electrical contracting has nothing to do with wireless, you’re wrong.

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Power Bridging Strategies
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For years now, the increasing demand for backup power has been a major issue for both consumers and electricians because voltage surges can bring an entire home or office to a standstill.

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Resisting Change
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Since the 1980s, the National Fire Protection Association’s fire alarm standards have required the notification appliance (speaker) circuits used in high-rise building Emergency Voice/Alarm Communications systems to “survive” during a fire.

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New Multimode Fiber Spec Approved
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Previously, I informed you about ongoing activity concerning 10 Gbps Ethernet and a new multimode fiber. In March 2002, TIA approved the standard for this new multimode fiber and probably by the time this article is published, IEEE will have approved the 10 Gbps Ethernet specifications.

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TIA Approves Automation Standard
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In the March 2002 issue, I reported on the activity within the Telecommunications Industry Association (TIA) to develop a cabling system in support of building-automation systems (BAS). At the time of writing that article, the document was out for industry ballot.

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