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. 

As projects become more complex, electrical contractors need high-tech management methods to ensure more efficient results. Here are just a few examples to help you get headed in the right direction. 5pm

The dark fiber providers that most people are familiar with are private companies that were started to offer fiber connectivity for a profit. Today, there is a major movement toward building fiber networks as a public-private partnership.

Phasor diagram and equivalent sinewave plots

When considering power quality disturbances or the quality of the electrical supply, phenomena such as rms variations (sags, swells and interruptions), harmonics, unbalance and flicker usually come to mind.

Data center infrastructure management (DCIM) software enables data center operators to manage assets and changes, plan capacity, and monitor power, environment and energy usage.

More on Systems

Deterring the Mob Mentality

The State College (Pennsylvania) Borough Council was looking for answers. During the summers of 1998 and 2000, students from Penn State took part in large-scale riots.

Security Forecast

Perhaps Homeland Security Defense initiatives haven’t been the windfall the security industry expected, but this market and other related low-voltage segments continue to grow. After Sept. 11, the phones wouldn’t stop ringing for many manufacturers.

Cabling on a Shoestring

It doesn’t always take cutting-edge technology to launch new applications, although that certainly has been the case for the most part in low-voltage in recent years.

Saved by the Bell

Educational construction continues to lead the non-residential market in new construction spending.

Wiring Air Conditioning and More

CODE CITATIONS Article 210 Branch Circuits Article 250 Grounding Article 300 Wiring Methods Article 310 Conductors for General Wiring Article 334 Nonmetallic Sheathed Cable: Types NM, NMC and NMS Article 422 Appliances Article 518 Places of Assembly Article 700 Emergency Systems Wiring air condition

Fiber Optic Update

Fiber optics, as we all know, has not had a very good time the last couple of years, with the overall market dropping by almost 80 percent (see chart at top right).

Installing a Service Disconnect

Many changes have occurred to the National Electrical Code (NEC) since the first NEC was published on Aug. 31, 1897. Even though the electrical industry was in its infancy, this “first” NEC was remarkably insightful and has withstood the test of time.