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. 

“Dark fiber” is a term often heard in conversations about fiber optic communications. Perhaps this is because it has a name that sounds evil or nefarious. But dark fiber is just fiber that has been installed and is not currently in use; instead, it is reserved for spares or future use.


If you’re going to do a job right, you need the right tools. Today, the definition of tool goes beyond wire crimpers and multimeters. It now includes smartphones and the apps that make them crucial to a contractor’s success. The following are some of the apps that contractors could consider using.


Last month, we looked into positive, negative and zero-sequence components, also known as symmetrical components, with virtually no math involved.

It is a sign of tight budgets when facility directors at most K–12 and higher education institutions receive mandates to defer maintenance on their existing building inventory to allow for budget dollar application elsewhere.

More on Systems

 
Gigabit Ethernet Expands into a WAN Technology
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Recently, there has been a surge of interest and activity in using Ethernet as a wide area network (WAN) technology. This is surprising because Ethernet was developed as a local area network (LAN) technology, serving to deliver data between computers within the same building.

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Grab Your Share of Security
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Insiders in the security alarm industry—those installing companies that have been at it successfully for years—are reluctant to share their secrets to success.

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TIA/EIA-568-B Is Finished!
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With the approval of TIA/EIA -568-B.2—Part 2: Balanced Twisted-Pair Cabling Components at the March 2001 meeting of TIA, all three standards making up the TIA/EIA-568-B Commercial Building Telecommunications Cabling Standard are approved and published.

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Voice/Data/Video Product Focus
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Intermediate Arrester

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The Web Can Help Us Do Important Things, Three Large Contractors Say
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From Louisville, St. Louis, and Leavenworth, Kan., the three contractors profiled—last month, this month, and the next—are working to become even more lean and efficient.

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Understanding Cable Materials and Tester Measure Categories
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Various Gigabit Ethernet testers are available.

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10 Gbps Ethernet as a Fiber-only Platform
by Staff |
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As soon as the Institute of Electrical and Electronics Engineers (IEEE) finalized the 1 Gbps Ethernet solution on fiber, they began work on the 10 Gbps Ethernet solution.

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