In the last issue we discussed the NEC requirements up through 110.14, Electrical Connections, so we will start with 110.15, the requirement for identifying the high leg. Now you’re probably asking, what is a high leg? To answer that, we have to review some of the basics related to voltages and transformer windings and connections.
(2 votes, average: 5.00 out of 5)
Just by mere observation of the world around us, we can see that the wave of new products and technology is approaching enormous proportion, and currently shows no sign of slowing down. To this end, the landscape of plan review that has looked pretty much the same for many years is changing daily.
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Electric Vehicles (EVs) are expected to account for as much as 15 to 20 percent of annual vehicles sales worldwide, which means millions of vehicles that use electrons as power will be plugging into the grid. What does that mean for electrical inspectors and those who write building codes across the U.S. and around the world?
(No Ratings Yet)As society moves towards emerging technologies, there come many challenges. This is true with introduction of the electric vehicle. It should be as simple as telling the owner of an electric vehicle “all you need to do is plug your vehicle into an outlet and charge the battery.” However, we all know that there are [...]
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For nearly a century from about 1897 to 1997, premises wiring systems in residences and commercial buildings have largely been collections of passive conductors, disconnects and overcurrent devices. Certainly there have been incremental improvements in these systems and they can be quite complex with the addition of transformers, motor controllers, GFCIs and AFCIs, but much of that complexity is due to the connected loads that are not covered in inspections under the requirements of the National Electrical Code (NEC).
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Complacency causes accidents. Although many other factors come into play in the prevention of accidents, few are simpler to overcome than the state of being complacent.
(1 votes, average: 4.00 out of 5)
Car travel is an ingrained part of daily life for the majority of Americans, and many are reluctant to take a chance on new technology without assurance that the reliability of all aspects of electric vehicles will be equal to that of traditionally fueled vehicles. Nevertheless, sales of electric vehicles in the U. S. are expected to grow quickly in the future, and the electrical grid and charging infrastructure are going to have to rapidly adjust to accommodate the market.
(1 votes, average: 5.00 out of 5)
Not just in print, the current issue of IAEI News is now available online. May/June 2011 is available now for you to flick through from cover to cover online! Click here to view We would love to know what you think.
(2 votes, average: 3.50 out of 5)
When one of the nation’s leading technical institutes sets out to design a new center for computer, information and intelligence sciences, top-quality electrical power was high on the list of must-have features. Why? Because all of the sensitive electronic equipment in the center would need clean, stable power, or the equipment simply would not work [...]
(No Ratings Yet)Our industry is experiencing a challenge that jeopardizes safety: growth of counterfeit products. Worldwide, counterfeiting is estimated to be 5 to 7 percent of world trade or about $600 billion each year. In the United States alone, that figure is $200–$250 million.
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IAEI, as the keystone of the electrical industry, is a membership driven, non-profit association promoting electrical safety throughout the industry by providing premier education, certification of inspectors, advocacy, partnerships and expert leadership in Electrical Codes and Standards development.
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