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

 
Abandoned Fire Alarm Cables, Conductor Derating and More
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CODE CITATIONS Article 90 Introduction; Article 110 Requirements for Electrical Installations; Article 210 Branch Circuits; Article 220 Branch-Circuit, Feeder and Service Calculations; Article 250 Grounding; Article 300 Wiring Methods; Article 310 Conductors for General Wiring; Article 400 Flexible

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The Return of Radio
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Wireless in 2004 and beyond is defined by innovative applications Wireless has gone beyond the realm of simple remote control. Now, wireless is always a part of the majority of the systems, services and products we use.

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Face-to-face Communication
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Videoconferencing allows visual contact without travel Who could have predicted that one day we could all instantly communicate no matter where we were, no matter what we were doing?

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Understanding OTDRs
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They can be useful—but only if used correctly There are two distinctly different fiber optic applications: premises cabling and outside plant (OSP) cabling. Premises cabling deals primarily with short multimode cables in buildings or between buildings in a campus.

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Redundant Grounding in Patient Care Areas
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Redundantly grounding all electrical equipment in a patient care area has provided one of the most critical pieces of a very complex puzzle involving patient protection.

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Cabling on a Shoestring
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It doesn’t always take cutting-edge technology to launch new applications, although that certainly has been the case for the most part in low-voltage in recent years.

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Saved by the Bell
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Educational construction continues to lead the non-residential market in new construction spending.

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