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. 

Design/build means different things to different people. Regardless, you should know that it places more responsibility on your shoulders as the electrical professional. It means you need to stay abreast of the codes that affect your installations.


Figure 1: Typical magnitude of voltage sag as percent of nominal compiled of EPRI DPQ Project in 1990s

A customer recently called me about the information on his power quality monitor screen. He said about a dozen different events were showing up, but the lights had just blinked once. He wanted to know what all of the other nonsense was supposed to tell him.

Last month, I wrote about how fiber was being used to expand bandwidth for cellular systems, connecting cell towers to the phone network and antennas on the tower to the base electronics. That helps our phone coverage when we’re driving or walking outside.

Workflow-management tools are designed to orchestrate everyday business processes. For example, a contractor may implement a process for submitting, reviewing and approving expense reports.

More on Systems

 
Rising to IBS Installations' Challenges
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The arena of voice/data/video installations for electrical contractors can be both challenging and rewarding. The market is flowing into combining the traditional with the new in what is now being called integrated building systems (IBS) installations.

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Multimedia Cabling Demands Flexible, Creative Solutions
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Multimedia applications have just taken over networks. Long gone are the days when the most taxing task for any network was moving data files through itself.

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Upholding Safety in Fiber Optic Installations
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Regarding safety in fiber optic installations, the first thing that comes to mind is usually eye damage from laser light in the fiber. People imagine a laser burning holes in metal or perhaps burning off warts.

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Is FTTD Just Another False Alarm?
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Well, we’ve heard it all before—fiber to the desktop (FTTD) is on its way to becoming the power source of choice. While unshielded twisted pair (UTP) cabling has been dominant, there is reason to think fiber will be a true competitor soon.

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Ensuring Standards-Compliant Structured Wiring
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With the convergence of voice/data/video (VDV) applications within both the commercial and residential ectors, electrical contractors are now faced with becoming information technology professionals in addition to being electricians.

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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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