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. 

Figure 1: Voltage and current transients during switching

Engineers in a large electric utility’s power quality (PQ) department had installed PQ monitoring to determine the source of a system component’s failures. They needed to see the voltage and current waveforms before, during and after the cap banks were switched in and out.

Six years ago, with no experience as an internet service provider (ISP) or telecom service provider, Google Fiber generated an immense amount of excitement by announcing that the company was going to build a gigabit-speed fiber-to-the-home (FTTH) network for Kansas City, Mo., a city chosen from more

Access control is one of the most prevalent and longstanding methods of securing entrances, exits and areas within protected premises.

Appetite for intelligence


The simplicity and ubiquity of home automation means opportunity for ECs. For one thing, today’s systems come ready to install, and contractors can learn installations in a matter of hours rather than weeks. For many ECs, it has been a welcome transition.


More on Systems

 
Great Heights

Project managers at Baker Electric knew in 2001 that powering Des Moines’ new world-class sports and entertainment campus would be a major event.


READ MORE
 
A Protective Barrier

Optical fiber, like copper wire for communications, needs to be kept dry to maintain its performance. On wire, moisture causes high impedance and crosstalk. In fiber, it adds to the attenuation and may make fibers brittle and more susceptible to damage.


READ MORE
 
The Future of Smart Buildings

There is an all-electric house in Tennessee that costs 82 cents a day to heat, cool and power. Built in November 2002 by Habitat for Humanity, it is one of four homes under the “Near-Zero-Energy House” name.


READ MORE
 
Video over IP Gains Ground

Live video has come a long way since the early 1990s. Remember the images of reporters filing news reports through the analog-transmitted video feed during the first Gulf War? It was shaky at best. But times and technology have changed and video streams are not even close to what they were then.


READ MORE
 
Use Your Metal

The failure of a service-entrance bus duct supplying power to a major grocery store data center and corporate facility created a dilemma for store management.


READ MORE
 
Ironing out the Kinks

When wireless sensors and detectors came on the market decades ago, the devices were known more for missing signals than capturing alarm activity. They were used in a “patch” type of approach, applied when hard-wired devices were impossible.


READ MORE
 
Essential to the Integrated Environment

Sensors and detectors have upped the ante with intelligent features and supervision, making them essential to an integrated and automated building environment.


READ MORE

Pages

X