Electrical Contractor Magazine

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. 

Last month, I covered the challenges to traditional structured cabling from multimode optical fiber and wireless. Multimode fiber became the favorite cabling for the backbone but never made it to the desktop because every connected device already had a free Cat 5 port.

In this third part of my series on the most common power quality phenomena, I group several IEEE 1159 categories together under the general description of “distortion.” Though one might argue that all power quality phenomena result in distortions of the voltage sine wave, these are the more steady-s

Positioning


About three years ago, security service providers started offering smart security solutions complete with professionally monitored home security services that were enhanced with home automation and energy management capabilities.

There is no shortage of organizations predicting what the construction market will look like in 2014. We have all experienced how poorly predictions may work out in some areas (e.g., the weather).

Electrical Contractor Magazine

More on Systems

 
Understanding Wavelength
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Fiber optics is full of jargon but it’s important to understand it. One of the more confusing terms to many is “wavelength.” It sounds very scientific, but it is simply the term used to define what we think of as the color of light.

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Branch Circuits, Grounding, Luminaires and More
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Article 210 Branch Circuits Article 220 Branch-Circuit, Feeder, and Service Calculations Article 230 Services Article 250 Grounding Article 404 Switches Article 410 Luminaires (Lighting Fixtures) Lampholders, and Lamps Article 445 Generators Article 702 Optional Standby Systems Volume I of the Fire

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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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