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. 

Brady BMP21-Plus label printer

Making labels on the job site can be a time-consuming task for integrated systems contractors, but it can pay big dividends in the long run.


In the last issue, I wrote about the practice of splicing two fibers with a fusion-­splicing machine. This month, I discuss some secrets that experienced splicers have learned—often the hard way.


Figure 1: Notching caused by semiconductor-controlled rectifier switching during commutation period

Maybe it is because they are rarely seen by the human eye or because the proliferation of surge protector strips makes everyone feel immune, but transients still exist and can wreak havoc with electrical equipment.

With cities and utilities worldwide upgrading to light-emitting diode (LED) lighting for streets and outdoor areas, owners and installers wonder when they 
will build in the controls for smart-city applications.

More on Systems

 
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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Double Duty

Using fire alarm systems for special applications Fire protection designers may use fire alarm systems for special applications in many building and fire protection scenarios.


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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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New Technologies Boost Data Center Operations

Speeding up the gigabit ethernet Two industry leaders (the Institute of Electrical and Electronics Engineers, or IEEE, and Intel) are working on a means to deliver information (or data) to the user faster, at rates of up to 10 gigabits per second (Gbps).


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