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July-August 2009
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Transfer Equipment Used in Optional Standby Systems for Commercial Applications, Part II – Transfer Equipment Options

by Chad Kennedy

The primary purpose of transfer equipment is to allow power transfer from a normal (Utility) source to an alternate (Generator) source while preventing the inadvertent interconnection of the normal and alternate source of supply during operation of the transfer equipment. During Part I of this series, we covered the fundamentals of transfer equipment used in optional standby systems and the use of key interlocks to provide a safe, simple, and reliable means of transfer. This article will explore transfer equipment options and provide additional guidance, questions to ask, and considerations for those systems. Read more

The Inverter

* Unraveling the Mysterious 705.12(D) Load Side PV Connections

by John Wiles

In our top-to-bottom perspective of a PV system, we have arrived at the inverter. The utility-interactive inverter is a key element in the PV system that helps to ensure safe and automatic operation of the system. Read more

Energy Loss, Global Warming and Voltage Drop

by Travis C. Lindsey

Safety first. That’s been the byword for electrical codes and electrical inspectors forever — and properly so. But is that enough? For people and property, the answer is "Yes.” But for economic and enviornmental reasons, the answer is: "Maybe we should be doing more.” Read more

What Does the IAEI Education Committee Mean for the Members?


It is pretty well understood about the need for education in our industry, whether it is needed due to improvements in technology and installation methods or in codes and standards. The only constant we have is that our world is constantly evolving. Lately, the economy has become an important factor as well. Read more

House Divided

by W. A. Werning

While I was teaching Article 220 and particularly Parts III and IV and Sections 220.40 and 220.80, respectively, questions were raised about the differences in the two methods for service/feeder calculations. Why would the National Electrical Code seem to contradict itself by allowing two methods for these calculations? Read more

Bonding Metal Gas Piping

by Michael Johnston

Many questions are being raised about the requirements for bonding metal gas piping systems. More specifically, when corrugated stainless steel tubing (CSST) is installed for the gas piping in a building, bonding methods and bonding jumper sizes that are more restrictive than required by the National Electrical Code® are causing some of the confusion... Read more

Dwelling Units — No Big Deal…Right?

by Keith Lofland

The battle lines are drawn, you must choose a side! Somewhere along the way, it seems that we in the electrical industry have gotten off track a bit when it comes to Commercial vs. Residential applications. Read more

How to Invest During a Recession

by Jesse Abercrombie

We are now in the seventeenth month of the recession, which began in December 2007, according to the National Bureau of Economic Research. Not only is this a long recession, but it’s also a severe one, marked by painfully high levels of job losses, a sharply reduced credit flow and a drop in the value... Read more

Budget, Attitudes, and Solutions

by Andre Cartal

We have all been subject to or victims of the budget process; and there is very little we can do about it since in many municipalities, building inspections are often regarded as a nuisance to be tolerated because the inspections can generate funds in excess of their budget to provide a "profit” to the municipal... Read more



Getting Approval to Attend Section Meetings

by James W. Carpenter

Does everything around you seem to be moving too fast for you to keep up with? Every day we get news of global warming, conflict between nations and within nations, world economy, national economy, local economy, stock markets falling, automobile companies and banks failing, jobs being lost, governments—national, state, and local—wanting more money, and, yes, inspection departments being downsized and in some cases being closed. Read more

Canadian Code

Changes — The 2009 Canadian Electrical Code

by Leslie Stoch

It’s here! I just received my shiny new copy of the 2009 Canadian Electrical Code and eagerly scanned it to find out what has changed. We are advised that there are 199 revisions, but many of them are editorial and will not result in changes from the 2006 CEC. Read more

Canadian Perspectives

Use of a "Special Permission” and "Power of Rejection”

by Ark Tsisserev

This article covers the application of two rules of the Canadian Electrical Code that establish a unique relationship between electrical designers/contractors and electrical safety regulators/inspectors in each jurisdiction where the CE Code is adopted for regulatory purposes. Let’s start with a "Special Permission” rule, or as it is described in the Code: "Deviation or postponement.” Read more

UL Question Corner

Wind turbines and wind turbine related equipment

by Underwriters Laboratories

I have heard that UL has developed requirements for wind turbines and is able to perform listing evaluations and field evaluations on this type of equipment. We have had a number of these turbines installed in our area and would like to require listing on the entire assembly... Read more

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