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. 

Evolution in action


Much has been said and written about analog video cameras and the move to internet protocol (IP) networked digital surveillance. Some predicted the demise of analog and takeover by IP devices would progress quickly, but clearly that hasn’t happened.

A while back, I wrote about a house with 14 kilowatts (kW) of solar panels installed on the southern exposure roof. Voltage and current monitoring at the breaker panel prior to the solar panel installation had shown 10–12-volt (V) deep sags occurring as frequently as every 22 minutes.

A June 2016 report, "Market Data: IoT for Residential Energy Customers," published by Navigant Research, examines the global market for devices and services that are considered to be part of the residential "Internet of Things" (IoT), including forecasts for shipments, installed base, average sellin

United States’ military strategists have talked about the threat of an electromagnetic pulse (EMP) strike since the Cold War in the 1950s, 1960s and 1970s.

More on Systems

 
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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The Network of Choice

The wired home is more prevalent than ever Thanks to our technology-driven world, the American dream of home ownership has evolved into owning a “wired” home that allows for enhanced networking. Home networking has become a multimillion dollar industry.


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Choosing a Loss Test Set

You get what you pay for Every fiber optic cable needs to be tested for loss with an optical loss test set (OLTS). The OLTS simulates the actual network hardware that will run on the cable so the test results will show if the network will work properly on the cable.


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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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The Return of Radio

Wireless in 2004 and beyond is defined by innovative applications Wireless has gone beyond the realm of simple remote control. Now, wireless is always a part of the majority of the systems, services and products we use.


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