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. 

Figure 1: Power quality phenomena over the voltage range

The lights blinked for an instant, or a running appliance made a sound like the motor was slowing down. No digital clocks were blinking, no computers restarted, no production lines stopped.

Security systems solutions are designed to keep customers and their facilities safe, detect intruders, and obtain visual evidence and identification.

Many contractors have said to me, “The fire alarm system is supervised, and I have a green light on the fire alarm control unit.

A new piece of software developed by students will make streetlight outage detection a lot easier and faster for the City of Las Vegas.

More on Systems

 
Integration Infatuation

Stop thinking burglar and fire alarms and start thinking computer-based integrated building solutions No matter what you call it—low voltage, voice/data/video or security—it’s a discipline that almost always is coupled with other technologies, facilities management and computer functions in a turnk


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Grounding of Receptacles, Overcurrent Protection for a Feeder and More

Article 110 Requirements for Electrical Installations Article 250 Grounding Article 310 Conductors for General Wiring Article 312 Cabinets, Cutout Boxes and Meter Socket Enclosures Article 430 Motors, Motor Circuits and Controllers Article 518 Places of Assembly Thermostat as motor disconnect Q:May


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Fusion Splicing

The best method for fiber ending Fiber is no longer the cable of the big guys alone. Things have changed and fiber is more affordable and more popular than in the past—it has even reared its head in the home networking market. Like the tortoise, fiber has taken the slow-but-steady approach.


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New Uses For Fiber Optics

Signs, sensors and nondestructive testing Most contractors, as installers of building cabling systems and those involved with telephone companies, CATV or utility outside plant installations, are familiar with fiber optics.


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STP vs. UTP

Money usually decides this debate One of the great debates that affects contractors—especially those dealing with communications systems—may be the question of shielded twisted pair (STP) or unshielded twisted pair (UTP).


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Cameras in the Classroom
by Staff |

School security is changing as fast as it is growing, and electrical contractors who don’t educate themselves in the latest digital video recording and imaging equipment stand likely to lose out on a lucrative market.


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Data Center Design Recommendations

Think ‘tiers’ for a standards-compliant data center It seems as if a big chunk of future contracting work will come from designing, installing and supporting data centers. There are many reasons this is being headlined in the telecommunication trades: it’s a solution to many problems.


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