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. 

All of that dark fiber we have been discussing the last few months is getting used for some fast-growing applications, and the fastest may be connecting cell towers. Cell phones have evolved into mobile data devices. Smartphones and tablets consume vast amounts of data.

A hot summer’s evening usually begets long lines at the local ice cream shop. Recently, at one such shop, the line grew extra long when the cash registers and credit card machines mysteriously powered off and on.

Historically, if a problem occurs with a traditional string power inverter that links several solar panels together in series, or even simple shade, that issue can bring down an entire solar photovoltaic (PV) array.

As government tax credits and utility rebates and incentives dry up, energy-efficiency improvements have evolved beyond the low-hanging fruit of fixture replacement at low cost.

More on Systems

 
Quick Fiber Optic Terminations
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One often needs a fast fiber optic termination.

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Derating Conductors in a Raceway and More
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CODE CITATIONS Article 220 Branch-Circuit, Feeder and Service Calculations Article 230 Services Article 240 Overcurrent Protection Article 310 Conductors for General Wiring Article 312 Cabinets, Cutout Boxes and Meter Socket Enclosures Article 404 Switches Article 410 Luminaires (Lighting Fixtures)

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TIA and You
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The Telecommunications Industry Association (TIA) is an industry organization with paying members from the communications/telecom industry. They develop minimal performance standards for cabling and related hardware and installation standards for the users/designers.

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Wireless: No Wonder
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Russ Lambert has trained as a lawyer (with a legal degree), served as a project manager for an electrical contractor (in this case, Fischbach & Moore) and worked at a high level for a major electrical distributor (specifically, as director of e-Commerce for WESCO Distribution during the dot-com

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Wireless LANs
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From a systems standpoint, wireless has been the talk of the town. It seems as if everyone was promoting this technology as one that would change the way we all view networking. Wireless has finally taken the great leap from industry projection chatter to commonplace buzzword.

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Solving the Labeling Dilemma
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Labeling and documentation can be separate tasks, but they go hand in hand and should be completed, at least in part, at the same time.

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Shopping for Retail Fire Systems
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Retail stores or “mercantile” properties, as defined by the various building codes, include everything from small mom-and-pop stores in free-standing buildings to multiple stores in a strip mall, from large, enclosed malls to big-box stores selling books, hardware or whatever.

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