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 years leading up to 2016 were transitional for the security industry. As products and services continue to move to the cloud, the industry has been hard at work learning the morphing landscape and how to best approach the new wave of opportunity emerging from every front.

In the past year, fiber optics underwent some important developments, some technical and some market-related. For those of you working in fiber optic network design and installation, the changes present opportunities and challenges.


This article is the first in a series that provides a step-by-step approach for performing arc flash calculations.
 Arc flash studies and software


I often give my power quality (PQ) 101 course to new engineers or salespeople. This introduction starts with the basics: an overview of PQ phenomena based on IEEE 1159 Table 4.2 followed by Ohm’s and Kirchhoff’s laws and how they apply to power quality.

More on Systems

 
Lubrication Rooms with Pits, Receptacles Above Suspended Ceilings and More

CODE CITATIONS Article 110 Requirements for Electrical Installations Article 230 Services Article 240 Overcurrent Protection Article 250 Grounding Article 310 Conductors for General Wiring Article 400 Flexible Cords and Cables Article 406 Receptacles, Cord Connectors and Attachment Plugs (Caps) Arti


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Integrated Building Systems Today...and Tomorrow

Chances are, the buildings of tomorrow will be smarter, safer, more automated and computerized than the buildings in which we now live, work, shop and play. Sunlight will be used with maximum efficiency to boost indoor lighting. Lighting will work in concert with security.


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Lessons (to be) Learned

Consider the following statements summarized from a description of a “recent” blackout: • Needles on meters in utility control centers were swinging wildly.


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Calling All Contractors

Call centers have come full circle, mainly because they have helped to redefine and reshape customer service functions for a wide variety of businesses. Due to competition within almost all market sectors, customer service has become a defining business function.


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Electrical Power - A Right We All Treasure

North America received an earsplitting “wake-up call” last month when the biggest blackout in U.S. history darkened eight American states and two Canadian provinces, driving millions out in the streets and closing more than 100 power plants across the country.


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The Mysterious dB of Fiber Optics

Whenever tests are performed on fiber optic networks, the results are displayed on a meter readout in dB. Optical loss is measured in dB while optical power is measured in dBm. Loss is a negative number (like -3.2 dB), as are most power measurements. Confused? Many fiber optic techs are too.


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Extreme Installations

Often an electrical contractor will be asked to install a fire alarm system in what some would define as a “harsh” environment. In these cases, the contractor must be ready to satisfy his or her customer’s request for an adequate, code-complying system.


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