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. 

When a dead body was discovered in a hot tub in Bentonville, Ark., in late 2015, detectives looked for forensic evidence in uncommon places.

Just as building intelligence systems draw information about a building’s environment to help manage the facility’s efficiency and comfort, a low-cost sensor system is piggybacking on that trend, and it offers new opportunities for contractors.


Figure 1: Power quality phenomena over the voltage range

The lights blinked for an instant, or a running appliance made a sound like the motor was slowing down. No digital clocks were blinking, no computers restarted, no production lines stopped.

Security systems solutions are designed to keep customers and their facilities safe, detect intruders, and obtain visual evidence and identification.

More on Systems

 
Prefabricated Components

Using prefabricated and preassembled electrical components often can bring substantial cost savings, especially on large projects such as hotels and hospitals that have a large number of identical layouts.


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AFCI Protection, Nonmetallic Conduit and More

Article 110 Requirements for Electrical Installations Article 210 Branch Circuits Article 230 Services Article 240 Overcurrent Protection Article 300 Wiring Methods Article 342 Intermediate Metal Conduit: Type IMC Article 352 Rigid Nonmetallic Conduit: Type RNC Article 408 Switchboards and Panelboar


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Bluetooth Moves Ahead

Good old Bluetooth, the hot topic in regard to personal area networks (PANs). Though it goes into a sort of technology-remission every so often, it is still out there and has a loyal following. Attention is once again being focused in its direction, but this time for different reasons.


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CCTV: Any Application, Anytime

If you blink, you may miss something. That's how fast the closed-circuit television (CCTV) surveillance market is moving these days. But capturing surveillance activities is something CCTV cameras won't miss.


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Fiber Outlook, 2005

Every year, fiber optics gains more converts and more market share. And each year, many of its proponents predict the demise of copper wiring. Don't believe it-not yet.


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Terminal Grounding

Isolated ground receptacles are installed for the purpose of reducing electromagnetic interference on the grounded conductor.


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Restoring Networks

In outside plant fiber optic installations, the biggest cause of network failure is what we call “backhoe fade,” which is pretty self-explanatory.


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