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. 

Plug loads, according to a pilot study performed by New York-based green technology company ThinkEco Inc., make up the fastest growing end-use of electricity in the commercial sector. As the amount of electricity used by plug loads grows, it becomes increasingly important to manage it.

In attempting to explain to a colleague why we care about negative sequence components, I tried to follow the guidance that Bob Lawrie, another member of the NFPA 70B Electrical Equipment Maintenance committee, offered to me many years ago: never use a formula in an article.

Another year has passed, and we have nothing revolutionary to report about fiber optic technology—no instant-on connectors, dirt-cheap lasers or simple solutions to installation problems.

When a potential client calls on you to provide a fire alarm system, do you assume the design responsibility? If so, what resources do you use?


More on Systems

 
'Standards Compliant' in the Residence
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 Moving toward standardization Certain elements of the installation of wiring/cabling for residential low-voltage systems are on their way to becoming “standardized,” or at least looked at as benchmarks. Here is a closer look at some guidance for a “standards compliant” installation.

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Fiber Optic Cleaving Techniques
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A good cleaver helps cut out costly mistakes To get good fiber optic splices or terminations, especially when using the pre-polished connectors with internal splices, it is extremely important to cleave the fiber properly.

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'James Bond' Surveillance
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Covert “007” techniques are possible James Bond, watch out! Now, many of the techniques employed by the action adventure hero turned cultural icon are possible—especially when it comes to closed-circuit television surveillance (CCTV).

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Bridging the IT Gap
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It’s easier when you speak the language

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Wire Cutting and Paralleling
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A little innovation goes a long way More than 25 years ago, Rexel’s Upper Marlboro (Md.) Regional Distribution Center came up with a value-add to improve service to contractor customers. Among the first to take advantage of Rexel’s wire cutting and paralleling service was Dynalectric Co.

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Contractors Needed for Biometrics
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Over the past few years, the biometrics industry has experienced significant activity, resulting in myriad new applications as the demand for these products has increased. This trend is still on the rise, going full speed ahead.

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Motor-Operated Appliances
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Article 422 of the 2002 National Electrical Code covers electrical appliances used in dwellings, commercial facilities and some industrial installations. Many appliances utilize only electrical power.

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