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IAEI News>Issue Listing>January/February 2006 
January/February 2006
 
Theme: Conduits


 
Effect of Rooftop Exposure on Ambient Temperatures Inside Conduits 
by Travis C. Lindsey, William T. Black, and Peter A. Sharpe 

The interiors of conduits in sunlight, such as those containing conductors feeding air conditioning units on rooftops, become significantly hotter than the outside air (which is always measured in the shade). To determine the need for ampacity corrections, these temperature differentials need to be added to the outdoor temperatures, which reach 90F or higher in most areas of the USA during the summer months. These corrections should be made to the conductors, but seldom are, according to rules in effect in the National Electrical Code.

Conduit Bodies and Their Use in Accordance With the NEC 
by Tim McNeive

One of the most versatile components of an electrical raceway system is the conduit body. Knowing the exact use for which the conduit body will be employed is critical in applying the appropriate sections of the NEC.

 
The Inspector’s Approval 
by Michael Johnston

This article takes a closer look at the electrical inspector and the process of approving an electrical installation and the associated equipment. It’s a big responsibility for the inspector and the jurisdiction, but it is often taken for granted by both.

Ideas—Ideas—Ideas!  
by Earl W. Roberts

Have you ever wondered how a new product idea is first conceived—is nurtured in somebody’s mind—and is refined into a finished new product for use?

How Will Oil Prices Affect Your Investment Plans
by Jesse Abercrombie

Today, high energy prices, and their possible impact on the economy and the financial markets, are making big news. Next year — who knows? The fact is that there will always be "reasons" to shake up your investment strategies. But the smartest investors are the ones who find the course that's right for them — and stick with it. 

Perspectives on PV: Back to the Grid, Designing PV Systems for Code Compliance    
by John Wiles

Utility-interactive PV systems can be designed to be safely connected to the supply side of an existing service disconnect. These connections are being made throughout the country on both residential and commercial PV systems.

Aluminum Building Wire Installation and Terminations 
by Christel Hunter

In my experiences as a field engineer with Alcan Cable, I’m often asked about the right way to install aluminum building wire. Quite often I’m told that aluminum wiring is fine, as long as the installer is careful. The implication is that installing aluminum building wire is in some way trickier than installing copper building wire. Although this might have been true with pre-1972 aluminum wire, conductor and connector changes have made installing aluminum building wire as simple as installing copper.

2006 International President: Wayne Lilly 

When you ask Wayne Lilly what one word he associates with IAEI he responds, “Opportunity. Looking back over the years, I see what opportunities were extended to me and how those opportunities shaped my life and future...I took the opportunity to become and stay a member. I took the opportunity to gain as much knowledge as I could and to return to IAEI as much as I could."

Editorial: What Will Tomorrow Bring IAEI? 
by James Carpenter, CEO/Executive Director

So, what is in the future? I don’t have a crystal ball, but for IAEI to continue to be a force that commands respect with industry and governments, we must do a better job in several areas.

Canadian Code: Rule 36-110, High Voltage Clearances 
by Leslie Stoch

Both the Canadian Electrical Code (CE Code) Part I and Part III provide requirements for minimum horizontal clearances between high voltage lines and buildings, and vertical clearances between high voltage lines and grade. This article discusses the different approach taken by each.

Electricity Fundamentals: Basic Electricity—Part 10 
by David C. Young, PE

In part nine of this series, I discussed the development of the phasor diagram, a graphical representation of voltage or current magnitude in ac circuits at any instant in time. To better understand the uses of a phasor diagram, let’s take a look at the phasor diagrams of typical utility supply voltages.

UL Question Corner (pdf)
by Underwriters Laboratories

The “UL Question Corner” answers questions of general interest that are sent in from authorized government inspectors and we believe will have interest for many inspectors.

 

 

 

 
Meet 2006 International President Wayne Lilly
Conduits and Rooftop Exposure
Designing PV Systems
Inspector's Approval
Aluminum Building Wire
 

 

 

 

 

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