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. 

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.

Figure 1: Voltage and current transients during switching

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.

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

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

More on Systems

 
Feel the Heat of Convergence

Convergence among security, lighting, energy management and other disciplines is growing in a host of financial and retail institutions; As more security integrators appear on the scene to solve retailer and banking problems—both from the physical security and information technology (IT) side—contra


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Fiber Takes the Blue Ribbon

The ins and outs of ribbon fiber optic cable You would think that after being in a business for more than 25 years, you would have seen it all. But recently, I was introduced to the actual installation and splicing processes for ribbon fiber optic cable.


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Think Ahead

Commissioning fire detection and alarm systems Normally, a fire alarmis the last system to be commissioned on a project. The owner, of course, wants to obtain the certificate of occupancy and move into his or her building.


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Great Power Debate

The DC power alternative Data center projects usually translate into big-ticket deals. From the user’s perspective, data centers are hungry beasts that consume massive amounts of energy. One reason for this large energy consumption? Unlike other facilities, they operate 24/7.


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California Gets the Greenlight for Market Redesign

SEVERAL YEARS after the state’s notorious energy debacle, the California Independent System Operator Corporation (California ISO) now has clearance to move forward with a major overhaul of the state’s energy market.


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Nuclear Power Plant Plans Increase in Output

Progress Energy Florida (PEF) has asked state regulators to approve increasing the output of the utility’s Crystal River nuclear plant, a proposal that is expected to save billions of dollars for customers.


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