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. 

United States’ military strategists have talked about the threat of an electromagnetic pulse (EMP) strike since the Cold War in the 1950s, 1960s and 1970s.

A local microgrid in Sendai, Japan

One of the byproducts of the surge in renewable power and smart technology has been the expansion of microgrids. According to recent reports, the systems are expanding nationwide.

Aquila in position prior to takeoff. (From left: Kathryn Cook, technical program manager for Aquila; Yael Maguire, head of Connectivity Lab; Mark Zuckerberg, Facebook founder and CEO; Jay Parikh, global head of engineering and infrastructure)

On June 28th, Facebook launched Aquila, a high-altitude, unmanned solar-powered airplane, for its first flight at Yuma Proving Ground in Yuma, Ariz. Although the team has been running tests and practice flights for months, until this point, only a 1/5th scale airplane had been tested.

Once a technician has spliced a fiber optic cable, he or she must test the splice to verify it is strong and has low loss. The technician must add the test data to the documentation for future reference and present it to the cable plant owner to verify the installation has been done correctly.


More on Systems

 
Number of Conductors in an Outlet Box, Connecting Ground Rods and More

CODE CITATIONS Article 250 Grounding Article 314 Outlet, Device, Pull and Junction Boxes; Conduit Bodies, Fittings and Manholes Article 430 Motors, Motor Circuits and Controllers Article 440 Air Conditioning and Refrigerating Equipment Article 517 Healthcare Facilities Article 695 Fire Pumps Overcur


READ MORE
 
Private Security

VPNs offer privacy over a public backbone From a systems standpoint, security always seems to make its way to the top of any task list.


READ MORE
 
The Trouble with Mismatched Fibers

Careful documentation can help Gone are the days when all fiber optic cables were the same. Most building cables had 62.5/125 micron multimode fibers for LANs or security systems, while outside plant cables were all single-mode fiber.


READ MORE
 
Make Data More Productive

Improving the information flow Real-time data is a hot commodity in technology-for-business circles right now. The interest is mostly coming from big companies, but that doesn’t mean it’s not for you. Real-time data is useful to even the smallest contractor with employees.


READ MORE
 
Analog Addressable Fire Alarm Systems

Is high-tech better? Fire alarm system technology seems to be developing faster each day. It wasn’t that many years ago when an electrician treated a fire alarm system just like any other electrical system he or she had to install.


READ MORE
 
Choosing the Right System

Choices include surveillance, access control and location Safety and security systems for any healthcare facility are complex. There are so many “systems” available that it is quite daunting to decide which ones are worth the investment.


READ MORE
 
Article 220-Branch Circuit, Feeder and Service Calculations

Cooking Equipment Calculations, Part IV 220.19 Electric Ranges and Other Cooking Appliances


READ MORE

Pages