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. 

If you buy a new car in 2040, there’s a better than 50/50 chance it will be powered by electricity rather than gas.

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.

More on Systems

 
That's So Boring

Last Fall, a contractor working for Google Fiber in Nashville, Tenn., made headlines for breaking a 36-inch water main while doing directional boring. That was the second time that contractor had broken a water main in a week.


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Helping Others Help You: Using PQ Site Audit Forms 


Reviewing data files from power quality (PQ) monitors to find evidence pointing to the cause of a customer’s problems may sound simple enough for someone who has worked in the industry for more than 35 years.


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Reusing Fire Alarm System Cable

Many contractors work on building tenant fit-outs or reconfigurations of existing spaces where an existing fire alarm system requires updating. Often, a fire alarm equipment salesperson will lure the contractor into thinking it is OK to reuse the existing system’s wiring and cable.


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Beyond Hardware: Product Selection Means More Than Price


Shopping for products today involves a world of possibilities. There are online resources and distributors with brick-and-mortar stores and mobile apps to speed up the process. Price is fairly standard, barring volume or project discounts.



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Debunking Six AFCI Myths

An arc fault circuit interrupter (AFCI) is an advanced circuit breaker that, as a way to reduce electrical fire threats, breaks the circuit when it detects a dangerous electric arc in the circuit that it protects.


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Cabling Infrastructure In Buildings: Material For Terrorists?

What we have been installing in buildings and data centers for years that could be a lethal element for a terrorist attack?


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Battery Storage Technology Expanding Worldwide

Renewable generation and energy storage technology have evolved at a similar pace in recent years. Their mutually beneficial relationship is no mystery.


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