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. 

When it comes to both overhead and underground distribution and transmission lines, all may not be as it seems.

Global positioning systems (GPS) and radio frequency identification (RFID) are receiving renewed attention for security, operations management and logistical applications, bringing new sources of revenue to installing contractors and additional benefits to their customers.


I often think how lucky we are to work in a profession in which we save lives. It can also make us a good living if we pay attention. Do you pay attention?


The outlook for solar-power project deployment continues to brighten, creating opportunities for electrical contractors. According to the Solar Energy Industries Association (SEIA), Washington, D.C., 2014 was a banner year for U.S. photovoltaic (PV) projects.

More on Systems

 
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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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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