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. 

The predictions have arrived! Analysts expect the first quarter of 2015 to show a rapid rise in commercial construction. Obviously, this is good news on almost all fronts.

One of my responsibilities over the years has been to field questions from our members and authorities having jurisdiction (AHJs) to help them find and understand code requirements. I have benefitted from the process as well.

A limited number of low-voltage contractors specialize in the installation of sprinkler systems power and controls. For them, it provides a regular source of revenue that most contractors have bypassed.

Fluke Networks DSX-5000 CableAnalyzer certification tester

A certification tester is the basic instrument for certifying that a building’s structured wiring meets industry standards. At one time, structured wiring referred to a facility’s communications network, but that has changed.

More on Systems

 
Maintenance Involves Constant Upgrades and Replacements
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Voice/data/video (VDV) cable plant has become the central nervous system of the customer’s business. It is necessary for producing and delivering your customer’s products and services.

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Wireless LANs: Mobility at Ethernet Speed
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IEEE 802.11 provides platform for new applications When the concept of the wireless local area network (LAN) was introduced more than 20 years ago, numerous companies tried to implement its applications through the use of spread spectrum, infrared and narrowband microwave technologies based on twist

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Control Cables in Cable Trays
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Cable trays can be a very convenient method of transporting large numbers of signaling, communications and control cables, as well as other cables, from one location in a facility to another. If cable trays are to be used, however, some specific requirements must be followed.

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Communication Systems Offer Routine Emergency Services
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A hostage situation can occur almost anywhere, anytime. But communication systems alert a building’s occupants to evacuate or take other appropriate action.

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Dealing with Obsolete Components
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It may seem unbelievable, but fiber optic links and networks have been used for over 20 years. The first telco networks were installed in the late 1970s and data links were already in use by 1980, when there were few personal computers (PCs) and computer networks.

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Fire Pumps and Alarm Systems, Circuits, Services, and More
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CODE CITATIONS Article 100—Definitions Article 210—Branch Circuits Article 230—Services Article 695—Fire Pumps Article 725—Class 1, Class 2, and Class 3 Remote-Control, Signaling, and Power-Limited Circuits Article 760—Fire Alarm Systems Article 770—Optical Fiber Cables and Raceways Article 800—Comm

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Calculating Fiber Optic Power Budgets
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After a fiber optic cable plant is installed, it may be used with several different types of fiber optic networks. Computer networks, telephone signals, video links, and even audio can be sent on the installed fibers. Each network type has a performance requirement for the fiber optic cable link.

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