Jim Dollard has an extensive background in codes and standards. If you have a query about the National Electrical Code (NEC), Jim will help you solve it. Questions can be sent to firstname.lastname@example.org. Answers are based on the 2014 NEC.
Communications cable and 300.4(E)
On June 28th, Facebook launched Aquila, a high-altitude, unmanned solar-powered airplane, for its first flight at Yuma Proving Ground in Yuma, Ariz.
Although the team has been running tests and practice flights for months, until this point, only a 1/5th scale airplane had been tested.
The continuing deployment of fiber optic cable is newsworthy in industry trade publications and the consumer press. Serious home-internet users want more bandwidth to download, upload and stream online video.
Electrical contracting companies involved in the installation of underground power or communications cable must know the locations of existing buried utilities before beginning excavation or directional drilling.
All of those millions of miles of dark fiber are primarily expected to deliver broadband connections. The Internet continues to grow unabated, and bandwidth must be expanded to accommodate that growth.
Last month, we discussed how long-distance dark fiber is used to connect data centers. Everywhere you look, you read about new data centers being built by Google or Facebook or Amazon or some other one with a strange, unpronounceable name.
Last month, we looked at how dark fiber is tested to determine its capability of supporting newer, faster transmission networks. Once dark fiber has been tested and its usability confirmed, communications systems can be connected.
Some cabling industry stakeholders predict the imminent death of copper cabling, while others disagree. However, most agree that fiber optical networks are taking a large bite out of the new network market.
“Dark fiber” is a term often heard in conversations about fiber optic communications. Perhaps this is because it has a name that sounds evil or nefarious. But dark fiber is just fiber that has been installed and is not currently in use; instead, it is reserved for spares or future use.
As a contractor, you must be able to sell your services to a potential client with a proposal that fully conveys the scope of work you intend to provide while also conveying confidence in your company’s ability to perform the work.
In an era of constant communication and overwhelming amounts of data, information fatigue is always a risk. In one industry, however, overcommunicating has not caused a backlash. In fact, it has been quite the opposite.
It is interesting to monitor how the biennial “Profile of the Electrical Contractor” research study has changed over the years. It shows how the EC evolves with the times, including adding communications work to their offerings. Those who responded to market shifts made the move to profit.
Termination of installed optical fiber cables has always been perceived as a difficult, expensive, time-consuming process that discouraged some contractors from developing in-house capability for fiber installation.