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. 

Design/build means different things to different people. Regardless, you should know that it places more responsibility on your shoulders as the electrical professional. It means you need to stay abreast of the codes that affect your installations.


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.

More on Systems

 
'James Bond' Surveillance
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Covert “007” techniques are possible James Bond, watch out! Now, many of the techniques employed by the action adventure hero turned cultural icon are possible—especially when it comes to closed-circuit television surveillance (CCTV).

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Bridging the IT Gap
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It’s easier when you speak the language

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Wire Cutting and Paralleling
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A little innovation goes a long way More than 25 years ago, Rexel’s Upper Marlboro (Md.) Regional Distribution Center came up with a value-add to improve service to contractor customers. Among the first to take advantage of Rexel’s wire cutting and paralleling service was Dynalectric Co.

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PBX Systems - Then and Now
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The more things change . . .

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'Standards Compliant' in the Residence
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 Moving toward standardization Certain elements of the installation of wiring/cabling for residential low-voltage systems are on their way to becoming “standardized,” or at least looked at as benchmarks. Here is a closer look at some guidance for a “standards compliant” installation.

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Virtual Viewing with CCTV
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Networking and digitization continues to revolutionize closed-circuit television (CCTV) surveillance. Systems can be scaled to the application and integrated with other voice-data products to satisfy a host of needs that range from security and video management to identification and accountability.

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Contractors Needed for Biometrics
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Over the past few years, the biometrics industry has experienced significant activity, resulting in myriad new applications as the demand for these products has increased. This trend is still on the rise, going full speed ahead.

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