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. 

Waveform with harmonics: 8 percent of fundamental for the 2nd harmonic, 18 percent for 3rd, 10 percent for 5th, 5 percent for 7th, 2 percent for 9th
by
Staff  

There was a recurring topic at the summer meetings of the IEEE Power Quality Subcommittee’s various working groups and task forces, and it came to a head at a panel session on the latest version of IEEE 519 2014, IEEE Recommended Practice and Requirements for Harmonic Control in Electric Power Syste

Moving to upstart revenue streams and mobile, remote systems management is the way smart, low-voltage electrical contractors are doing something about the changing security and integrated systems market.

Recently, I came across some research that could be a useful tool. In August 2016, Security Sales & Integration (SSI) published its annual Operations and Opportunities Report, which reveals key trends in the security dealer and integrator market.


The market for data centers is growing. It is being driven by many factors, including big data, the Internet of Things (IoT), cloud computing and intelligent computing that data centers make possible.

More on Systems

 
Load-Side Grounding Connections

Picture an electrician installing a load center (technically, a panelboard) on a 120/240V AC system at a location in the building remote from the service location.


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Using System Smarts to Your Advantage

End-users can monitor events and plan responses Standard “tools” in current security and low-voltage equipment and peripherals allow installing contractors to more accurately pinpoint events so the end-user can plan an appropriate response.


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Choosing Testing Equipment

Price and preference play a part The feeling of satisfaction you get when a project is complete, is accompanied by one of accomplishment, whether it’s your first installation or your thousandth.


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Terminal Markings in a Panelboard and More

Article 210 Branch Circuits Article 250 Grounding Article 300 Wiring Methods Article 404 Switches Article 408 Switchboards and Panelboards Article 430 Motors, Motor Circuits and Controllers Article 527 Temporary Installations Also mentioned are the General Information for Electrical Equipment Direct


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Connector Types and Terminology

Where did these terms come from? Rarely do I present a fiber optic seminar without getting some questions on what some connectors terminology means, and often I’m questioned on how such a term originated.


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Building Bytes

As your “Online” correspondent, I try to track trends in electronic business, Web sites and more. In February, I journeyed to Orlando for the A/E/C Systems show, the only conference geared to construction computing. Here’s a quick look at what I saw and heard.


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ACknowledge

Brush up on what the NEC says about air conditioning During the hottest parts of the summer, most people do not notice the sound of air conditioning units turning on and off, but if a unit fails to start, the effect is noticed immediately. Comfort becomes a premium to be restored at all costs.


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