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. 

When it comes to both overhead and underground distribution and transmission lines, all may not be as it seems.

Global positioning systems (GPS) and radio frequency identification (RFID) are receiving renewed attention for security, operations management and logistical applications, bringing new sources of revenue to installing contractors and additional benefits to their customers.


I often think how lucky we are to work in a profession in which we save lives. It can also make us a good living if we pay attention. Do you pay attention?


The outlook for solar-power project deployment continues to brighten, creating opportunities for electrical contractors. According to the Solar Energy Industries Association (SEIA), Washington, D.C., 2014 was a banner year for U.S. photovoltaic (PV) projects.

More on Systems

 
Refrigerator Branch Circuits, Machine Tool Wiring, Foreign Piping and More
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CODE CITATIONS Article 110 Requirements for Electrical Installations Article 210 Branch Circuits Article 250 Grounding Article 310 Conductors for General Wiring Article 404 Switches Article 408 Switchboards and Panelboards Article 670 Industrial Machinery Branch circuit for refrigerator in dwelling

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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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