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. 

We are all aware fiber optics is the backbone of communications networks such as telecom, the internet, local area networks, cable television and more. It’s also the backbone of the electrical grid.

Over the past two years, the technical committee responsible for IEEE 1547, Standard for Interconnecting Distributed Resources with Electric Power Systems, has added a section on power quality (PQ), including the parameters, indexes and limits on those for distributed energy resources (DERs) connect

Mobile applications, an increasingly fluid workforce and improvements in product integration are changing the landscape of mass notification systems (MNSs) and emergency communications. The technology is more responsive and better directed in messaging to the masses.
 Keeping a close eye


On July 12, hundreds of companies and organizations will participate in the Day of Action for Net Neutrality. The event has the support of internet giants such as Amazon and Netflix as well as civil organizations like the American Civil Liberties Union (ACLU).

More on Systems

 
More To Come: A Sneak Peek at the 2019 NFPA 72, Part 2


In October, I listed some of the significant changes proposed for the 2019 edition of the NFPA 72, National Fire Alarm and Signaling Code. This month, I cover more of the important proposed changes. Keep in mind that this is based on the public input stage.


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Fluke’s laser distance meter
Cool Tools: Measuring Tools

Measuring tapes are a basic and necessary tool. When the dimension to be measured is inaccessible, handheld, laser 
distance-measuring tools may be the only safe and practical solution. 
 There are many options today for taking measurements on structured-wiring projects.
 Laser measuring tools



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A True Turnkey Integrator

Ferndale Electric Co., Ferndale, Mich., which employs an average of 130 electricians, performs electrical work for automotive plants, power plants, bottling plants and other industrial facilities. It also renovates electrical systems for lift bridges and completes major projects for airports.



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Open to Interpretation: The Accuracy of Optical Loss Measurement Data


Last month, I discussed making loss measurements with a light source and power meter—what we call optical insertion loss—and the causes of errors in those measurements.


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So Many Choices: Deciding Which PQ Instrument Is Right


One challenge with going to one of America’s iconic eating establishments—the diner—is that the menu has so many choices that decisions can change a dozen times before the server takes the order.


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Fiber Optic Testing

Continuing the thread of measurement uncertainty in fiber optics, this month I discuss measuring the loss of an installed fiber optic cable plant. Optical loss, tested with a light source, power meter and two reference cables, is the most common measurement in fiber optics.



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