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. 

On November 2, the United States Department of Agriculture announced a $2.5-billion investment in rural electric infrastructure improvements. These funds will be used to support improvements in 27 states, with the hope of creating jobs and supporting economic development.

Electrical contracting—and the electrical construction industry as a whole—may not be the first thing that comes to mind when you think of innovation.

FCC Chairman Ajit Pai

On Tuesday, Nov. 21, Federal Communications Commission (FCC) Chairman Ajit Pai announced plans to hold a vote for the repeal of the FCC's net neutrality rules on Dec. 14. Despite popular support of the FCC's net neutrality rules, the repeal is widely expected to pass.

A variety of carts and reel carriers are available to hold and transport wire reels.

From shipping and arrival of wire supplies through installation, efficiently managing electric wire on the job can be the difference between a profit or loss.


More on Systems

 
Low-Voltage Cable Market Set To Grow


While low-voltage cable often refers to what is used to wire audiovisual and fire alarm equipment, it also describes lower voltage electric grid distribution cable, as contrasted with the high-voltage cable used on transmission lines.


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Figure 1: Voltage and current transients during switching
Both Sides Now: PQ Monitoring Systems


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.


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Taking The Fiber Wheel

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


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Changing Expectations: Getting More From Access Control

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


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Appetite for intelligence

Phones and Apps: Taking Programming out of Smart-Home Installations

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.



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Circuits And Pathways

Beginning with the 2010 edition of NFPA 72, National Fire Alarm and Signaling Code, all of the “styles” of circuits were deleted, and four “classes” were added. A new chapter, Circuits and Pathways, was added during the reorganization of this code.


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Notification Know-How: A Look at Notification Requirements

Many designers of the notification portion of a fire alarm or mass notification system (MNS) seem unaware of the specific performance requirements for each type of appliance as required or allowed by NFPA 72 2016, National Fire Alarm and Signaling Code.


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