Stay up to date in the Electrical Industry
|To stay abreast of the constant changes in Technology
effecting the Electrical Industry click on the latest news stories
|December 8 - 15 - 2019
|'WiTricity' powers light bulb.
wireless electricity is here
MIT researchers have powered a light bulb by sending electricity wirelessly. The idea for wireless power
isn’t anything new. But problems have hindered its development. The researchers hope to make the
technology more efficient. Is this the end of power cords? Click link for more
Isolated power systems were primarily utilized as a protection technique to minimize the possibilities of
explosions and fires in flammable anesthetizing locations in health care facilities. Isolated power
systems are still utilized, but more as an optional protection technique or as required in wet procedure
locations as defined in Article 517 because interruption of power by ground-fault circuit interrupters
cannot be tolerated...click link for more
|Between Prevention & Compensation
Employers are required to record certain injuries and illnesses under the OSHA record keeping
regulation and to adhere to certain other requirements under workers' compensation law. The two laws
have separate functions: Workers' compensation is designed to compensate injured or ill workers,
whereas the Occupational Safety and Health Act is designed to prevent injuries and illnesses and to
create a body of information to improve understanding of their causes. Thus, certain injuries and
illnesses may be reportable under state workers' compensation law but not under the OSHA record
keeping rule and vice versa. The two things that OSHA's reporting requirements for injury and illness
have in common with state workers' compensation reporting requirements is that electrical contracting
firms want to decrease the number of both. Click link for more.
|TVA to Hire Electricians to Build Nuclear Reactors
For the first time in two decades, the Tennessee Valley Authority (TVA) is preparing to hire contract
workers. TVA officials predict it will need more than 500 contract electricians to build the Watts Bar Unit 2
nuclear reactor, starting in 2008. By the time that reactor is finished being built in 2013, TVA expects to
need a comparable number of workers to build each of two reactors tentatively planned for the Bellefonte
nuclear site in Alabama. "There should be a good demand for workers for years to come," says Dwight
Wilhoit, president of the International Brotherhood of Electrical Workers (IBEW) Local 175 in Chattanooga,
Tenn. "Everybody who wants to work right now has work. Especially in the South, we're looking to stay
busy for some time."
|Thomas Edison: Check out some of the inventions that are not as well known as the light bulb.
We all know that Edison is responsible for the light bulb and the phonograph. But are you familiar with
Edison’s entire body of work?
If not, you should visit this site. It is dedicated to Edison’s work. Start with the chronological listing of
You can view pictures and illustrations of some of the inventions.
|Let’s stop and buy some electrons
Several companies are moving toward viable electric cars. However, keeping them charged is always a
problem. Now, Shai Agassi wants to develop a nationwide network of charging stations.
And he has $200 million behind him.
|Is it really a neutral?
The definition of a neutral states the conductor that has an equal potential difference between it and all
other conductors (ungrounded conductors).
An example of a neutral wire would be the white or gray conductor of a single-phase 120/240 volt system
or a three-phase 4-wire Wye system. However, the white or gray conductor of a 4-wire, Delta system is
not a neutral conductor because the potential difference between each of the ungrounded conductors to
the white wire are not all the same.
The proper term for the white or gray conductor is the "Grounded Conductor." It gets its name from the
fact that at the electric service, transformer or other separately derived location,the white or gray conductor
is connected to the earth (grounded).
The rules for the use and identification of the grounded (neutral) conductor are contained in Article200 of
the National Electrical Code. Section 200-6 specifies that the grounded conductor must be identified with
the color white or gray..
When you call the white or gray conductor a neutral, and it's not, then you are using the term "neutral"
incorrectly. This term is used continually in the field every day and it's a generally the accepted practice,
but it's technically not the correct term to use under all conditions.
What's the purpose of the grounded conductor (neutral)?
The purpose of the grounded (neutral) conductor is to limit the voltage to ground and it permits the use
of line-to-neutral loads, such as 120 and 277 volts and it serves as a current-carrying conductor to carry
return (neutral) current.
In addition, a safety ground wire is provided for electric services (meter locations),therefore the grounded
(neutral) conductor is intended to provide a low-impedance ground-fault return path to earth