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. 

Continuing the thread of measurement uncertainty in fiber optics, this month I discuss measuring the loss of an installed fiber optic cable plant. Optical loss, tested with a light source, power meter and two reference cables, is the most common measurement in fiber optics.


Waveform with harmonics: 8 percent of fundamental for the 2nd harmonic, 18 percent for 3rd, 10 percent for 5th, 5 percent for 7th, 2 percent for 9th
by
Staff  

There was a recurring topic at the summer meetings of the IEEE Power Quality Subcommittee’s various working groups and task forces, and it came to a head at a panel session on the latest version of IEEE 519 2014, IEEE Recommended Practice and Requirements for Harmonic Control in Electric Power Syste

Moving to upstart revenue streams and mobile, remote systems management is the way smart, low-voltage electrical contractors are doing something about the changing security and integrated systems market.

Recently, I came across some research that could be a useful tool. In August 2016, Security Sales & Integration (SSI) published its annual Operations and Opportunities Report, which reveals key trends in the security dealer and integrator market.


More on Systems

 
Seeing (and Hearing) Is Believing

Over the last few years, there has been confusion over which laws or codes apply to the audible and visible notification appliances.


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Ghost Busters

The optical time domain reflectometer (OTDR) has been an important tool for fiber optic testing and troubleshooting since its invention 25 years ago. We have discussed this several times in this column and in other Electrical Contractor articles, so I hope you are already familiar with them.


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Residential-Specific LEED

Although the construction industry has been dealing with green buildings and sustainable design for quite some time, there is a new entry into this residential market arena: LEED for Homes (LEED-H).


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The Contractor's Responsibility

Contractors who have developed their fire alarm system maintenance and testing business and specialize in the retrofit markets have already seen the financial benefits associated with these specialized businesses.


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On Standby

As a subcontractor to the Federal Emergency Management Agency (FEMA), I see the immediate need for the installation of home standby generators firsthand.


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Linking up

Most cabling installers have only a vague notion of what goes on the end of the cables they install or how the equipment works, especially when it comes to fiber optics.


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Hardware-Based Firewalls

Most contractors opt out of networking projects when terms, such as “network security,” “firewall” and “software,” start getting thrown around. But, that may not be the best move to make, as network security is a niche market where contractors could easily profit.


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