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. 

Brady BMP21-Plus label printer

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.


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.


Figure 1: Notching caused by semiconductor-controlled rectifier switching during commutation period

Maybe it is because they are rarely seen by the human eye or because the proliferation of surge protector strips makes everyone feel immune, but transients still exist and can wreak havoc with electrical equipment.

With cities and utilities worldwide upgrading to light-emitting diode (LED) lighting for streets and outdoor areas, owners and installers wonder when they 
will build in the controls for smart-city applications.

More on Systems

 
A Lock on Hotel Security

The next generation of hotel security and lock systems will depend on two features—ease of access for the guest and ease of control for the hotel. As a result, there are some subtle shifts in the market that will change how electrical contractors do business.


READ MORE
 
Hotels and Casinos: A Challenging Combination

Interesting occupancies for fire detection Hotel and casino fire-alarm systems can prove challenging from at least three perspectives: first, the number of people moving about the facilities throughout the day and night who typically have no familiarity with their surroundings; second, the high ambi


READ MORE
 
Derating Cables, Metal Faceplates, Grounding Parking Lot Lighting Poles and More

Article 210 Branch Circuits Article 250 Grounding Article 310 Conductors for General Wiring Article 320 Armored Cable: Type AC Article 404 Switches Derating Cables Q: Is it necessary to derate types NM-B, AC or MC cables where these cables are bundled to enter a branch-circuit panelboard?


READ MORE
 
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.


READ MORE
 
Access Control Wizardry

Smarts and flexibility reign in this product genre Just when you thought access control had hit its peak, there’s more innovation to report. Access control is not just for physical security anymore, even though that too has seen its share of technological advances.


READ MORE
 
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


READ MORE
 
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


READ MORE

Pages