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. 

Brady BMP21-Plus label printer

Making labels on the job site can be a time-consuming task for integrated systems contractors, but it can pay big dividends in the long run.


In the last issue, I wrote about the practice of splicing two fibers with a fusion-­splicing machine. This month, I discuss some secrets that experienced splicers have learned—often the hard way.


Figure 1: Notching caused by semiconductor-controlled rectifier switching during commutation period

Maybe it is because they are rarely seen by the human eye or because the proliferation of surge protector strips makes everyone feel immune, but transients still exist and can wreak havoc with electrical equipment.

With cities and utilities worldwide upgrading to light-emitting diode (LED) lighting for streets and outdoor areas, owners and installers wonder when they 
will build in the controls for smart-city applications.

More on Systems

 
Deterring the Mob Mentality

The State College (Pennsylvania) Borough Council was looking for answers. During the summers of 1998 and 2000, students from Penn State took part in large-scale riots.


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Security Forecast

Perhaps Homeland Security Defense initiatives haven’t been the windfall the security industry expected, but this market and other related low-voltage segments continue to grow. After Sept. 11, the phones wouldn’t stop ringing for many manufacturers.


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Cabling on a Shoestring

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

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


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Wiring Air Conditioning and More

CODE CITATIONS Article 210 Branch Circuits Article 250 Grounding Article 300 Wiring Methods Article 310 Conductors for General Wiring Article 334 Nonmetallic Sheathed Cable: Types NM, NMC and NMS Article 422 Appliances Article 518 Places of Assembly Article 700 Emergency Systems Wiring air condition


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Fiber Optic Update

Fiber optics, as we all know, has not had a very good time the last couple of years, with the overall market dropping by almost 80 percent (see chart at top right).


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Installing a Service Disconnect

Many changes have occurred to the National Electrical Code (NEC) since the first NEC was published on Aug. 31, 1897. Even though the electrical industry was in its infancy, this “first” NEC was remarkably insightful and has withstood the test of time.


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