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. 

Splicing safety mostly follows the same guidelines installers use when installing any fiber optic cable plant. However, there are some special issues to be aware of.

My January 2015 article, “It’s Just Math,” explained how various parameters used to evaluate power quality (PQ) are derived while avoiding formulas and other mathematical expressions.

Electrical contractors (ECs) are bearing witness to dramatic changes in the physical security industry. Everything is moving to the network. Customers connect to systems and services with smartphone apps.

In my 40-plus years in fire protection, I have learned that electrical contractors (ECs) sell and install the lion’s share of fire alarm systems in medium- to large-size buildings. Most of these contractors also finish the installation, pass the acceptance test and move on to the next project.

More on Systems

 
High-Speed Copper

For data centers that still use copper, Category 8 (Cat 8) cabling promises to quadruple speed to 40 gigabits. Cat 8 could operate at a bandwidth frequency of 2 gigahertz.


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Brady BMP21-Plus label printer
Cool Tools: Label Tools

Making labels on the job site can be a time-consuming task for integrated systems contractors, but it can pay big dividends in the long run.



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Get It Together: Secrets of successful splicing


In the last issue, I wrote about the practice of splicing two fibers with a fusion-­splicing machine. This month, I discuss some secrets that experienced splicers have learned—often the hard way.



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Splice World: Inside fusion-splicing


Single-mode fiber needs many more splices than multimode. Outside plant (OSP) single-mode fiber links often require splicing shorter lengths of cable or drops off of a backbone cable. These OSP cables are usually fusion-spliced.


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Are Homes Getting Smarter?

Imagine a home where security cameras can distinguish between a dog, person and car and then alert you on your smartphone. Or, envision cameras in your refrigerator that enable you to check food inventory while grocery shopping. 



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More For Your Money: Power Quality Monitors

With the fifth generation of power quality monitors comes more parameters, features, communication modes and, for some users, challenges getting the answers that they want from the instruments.


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Arcing Short-Circuit Current

This article is the second in a series that provides a step-by-step approach for performing arc flash calculations. The first part, “A Calculated Introduction,” appeared in the January 2016 issue of ELECTRICAL CONTRACTOR.
 Arcing short-circuit currents



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