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

 
ACknowledge

Brush up on what the NEC says about air conditioning During the hottest parts of the summer, most people do not notice the sound of air conditioning units turning on and off, but if a unit fails to start, the effect is noticed immediately. Comfort becomes a premium to be restored at all costs.


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Double Duty

Using fire alarm systems for special applications Fire protection designers may use fire alarm systems for special applications in many building and fire protection scenarios.


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The Good Side of Government Intervention

A brief history of how fire alarm codes came about Many people are blissfully unaware of why we have fire alarm system codes and standards.


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Boom or Bust?

Are there jobs for you in the nuclear power market? According to the World Nuclear Association, a recent study determined that nuclear energy incurs about one-tenth of the financial cost of coal to produce electricity.


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Circuit Breakers on Delta Circuits, Flexible Metal Conduits and More

CODE CITATIONS Article 100 Definitions Article 210 Branch Circuit Article 220 Branch Circuit, Feeder and Service Calculations Article 240 Overcurrent Protection Article 250 Grounding Article 310 Conductors for General Wiring Article 334 Nonmetallic Sheathed Cable; Types NM, NMC and NMS Article 404 S


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Here Comes the Sun

Outdoor solar lighting has a bright future With little fanfare, solar lighting systems are being installed on a growing number of projects, and lighting powered by sunlight has quietly evolved into a mature technology with widespread acceptance.


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Plenum vs. Non-Plenum

A minor decision that can prove costly Cabling choices are abundant; there are so many options these days that it is almost impossible to list them without leaving a few out.


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