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. 

Electronic access control is one of the most proprietary technologies (beside fire alarms) with the largest installed base of legacy equipment in the physical security industry.

Since 1999, the National Fire Alarm and Signaling Code has required survivability for certain circuits that need to work during a fire. In truth, the code has always required speaker circuits serving emergency voice/alarm communications systems to meet a performance requirement for survivability. 


Figure 1: Special manual building evacuation station. Photo courtesy of Jensen Hughes Inc.

Recently, a number of inquiries were made to our office regarding the topic of delaying or preventing the activation of fire alarm notification appliances.

As data about home energy use expands, the next big thing could come from new products and services companies create to analyze and use that data.

More on Systems

 
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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Power Solutions

At the MIT Energy Conference in March 2016, U.S.


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Can You See The Light?

Strobes are essentially the only lights available for fire alarm notification. They have been misunderstood and even misused on occasion, but every fire alarm system with audible notification must have a complement of strobes to ensure the hearing-impaired occupants will be notified of an alarm.



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The Surveillance Migration

There is no doubt that video surveillance cameras are a critical, indispensable part of security at the customer’s protected premises. They can provide general security and assist with human resources functions when integrated with access control.


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