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. 

Last month, we discussed “dark fiber” and how most outside plant installations include more fibers than are needed at the time of installation. Later, those fibers will be used for expanding service capacity or leased out to provide income.

Our Houses—or, at least, the houses of the tech-savviest among us—are getting closer to running autonomously. Now, it’s not just that you can open your garage door or turn on your living room lights from a smartphone app.

Do you have a customer that requires additional access control at specific locations within their facility but no budget for a total rip and replace? Maybe they are concerned with hacking or data compromise.

The categories or labels used to describe the plethora of power quality phenomena that can occur on electrical systems have not changed much in the past decade or two. Measurement methods and acceptable limits for most systems have changed.

Electrical Contractor Magazine

More on Systems

 
Troubleshooting Fiber
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The fiber optic cable you just installed failed testing. What do you do next? How do you find the problem and fix it—fast? Fortunately, fiber optics is easy to install and experienced installers generally find that about 95 percent of all fibers they install will test good.

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Ethernet Evolves at Lightning Speed
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Ethernet...good old Ethernet. It seems as if this type of LAN technology has been around virtually forever. It also seems as if Ethernet will continue to be the driving force behind system networking, especially since this technology continually changes with time.

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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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Why is Bandwidth Finite?
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When fiber was introduced,its enormous bandwidth and extremely low attenuation made it the No. 1 choice to replace copper in long-distance telephone networks. Once the telcos switched from multimode to single-mode fiber in 1984, they found almost boundless bandwidth.

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