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January-February 1999
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January-February 1999 CoverJanuary/February 1999

TABLE OF CONTENTS

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Features

* What Changed in Article 690?

by John Wiles

Article 690, Solar Photovoltaic Power Systems, has been in the National Electrical Code (NEC) since 1984. An NFPA-appointed Task Group for Article 690 proposed changes to Article 690 for both the 1996 and 1999 codes. The Task Group, supported by more than 50 professionals from throughout the photovoltaic (PV) industry, met seven times during the 1999 code cycle to integrate the needs of the industry with the needs of electrical inspectors, and end users to ensure the safety of PV systems. The Task Group proposed 57 changes to Article 690 and all the changes were accepted in the review process. Read more


Perspectives on PV

* Photovoltaic Power Systems and the NEC

by John Wiles

Photovoltaic (PV) systems that generate electricity from sunlight are being installed in ever increasing numbers throughout the United States and the rest of the world. Over 150 megawatts of PV modules are being produced worldwide annually and these PV modules, when exposed to sunlight, will be generating electricity for the next thirty years and longer. Utility-interactive PV systems (that can feed power to the electrical utility grid) and stand-alone PV systems are being installed in both rural and urban locations on residential dwellings and commercial buildings. Read more

Departments

Editorial

IAEI Chapters Promoting Good Education

by Philip Cox

Two major purposes of the IAEI is to promote the uniform understanding and application of the NEC and other electrical codes and to collect and disseminate information relative to the safe use of electricity. In trying to achieve these objectives or goals, the IAEI focuses on education for both its members and the electrical industry in general. This is a great challenge. The IAEI staff and other contributors work hard to develop and produce educational material of a quality that can be readily used as learning tools for self motivated people who learn well through their own study and for others who prefer the classroom setting. Read more

The Other Code

The Cost of Losing an Arm

by David Young

Tom had flash burns to his face. Fortunately, he had been wearing safety glasses. What was left of his right arm had to be amputated above the elbow. He was in the hospital for almost four months. The medical care and physical therapy would continue for years. Tom said that he and two experienced linemen were called out on trouble at two o’clock in the morning. A relatively new housing development was completely out of telephone service. Read more

UL Question Corner

Which GTO cable types may be used in electric signs?

by Underwriters Laboratories

Question: Which GTO cable types may be used in electric signs? I am especially interested in the cable that looks like a coaxial cable? Read more

Closer Look

Looking at Article 240 Through the 1999 NEC

by John E. Brezan

For those of us who have been using the NEC for a number of years, when looking at the 1999 edition, we see a whole new document. This will be a cycle of relearning what we already know. Along with the changes is the relocation of a lot of existing information. It would be impossible to explain all of the rework and changes in Article 240 in just one short article. It is my recommendation that you check the IAEI News for a seminar in your area and attend it. Read more


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