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

 
Important Progress for LAN Performance Standards

The Telecommunications Industry Association (TIA) may only hold three meetings a year, but it does get plenty of significant work done.


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Ground-Fault Protection Systems for Services

Ground-fault sensing and relaying equipment is intended for use in power distribution systems rated at 600V maximum and are considered to be equipment protection devices, not personal protection devices.


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Analog Addressable Fire Alarm Systems

Is high-tech better? Fire alarm system technology seems to be developing faster each day. It wasn’t that many years ago when an electrician treated a fire alarm system just like any other electrical system he or she had to install.


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Choosing the Right System

Choices include surveillance, access control and location Safety and security systems for any healthcare facility are complex. There are so many “systems” available that it is quite daunting to decide which ones are worth the investment.


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Article 220-Branch Circuit, Feeder and Service Calculations

Cooking Equipment Calculations, Part IV 220.19 Electric Ranges and Other Cooking Appliances


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MooreAiis Law is Calling

Physical security and information technology team up Moore’s Law basically states that computer technology doubles in ability every 18 months or so, but why should that be a surprise?


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Length of Secondary Conductors Without Overcurrent Protection and More

CODE CITATIONS Article 200 Use and Identification of Grounded Conductors Article 210 Branch Circuits Article 240 Overcurrent Protection Article 300 Wiring Methods Article 334 Nonmetallic-Sheathed Cable: Types NM, NMC and NMS Article 362 Electrical Nonmetallic Tubing: Type ENT Article 450 Transformer


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