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Nonincendive Equipment for Use in Hazardous (Classified) Locations by Nicholas Ludlam and Bill Lawrence Nonincendive equipment is a protection technique for equipment installed in Class I, Division 2, hazardous locations. Understanding the Zone Area Classification Method in the NEC by Edward M. Briesch and Mark C. Ode The division classification method has been used in the United States since being incorporated into NEC 1920 to cover electrical and electronic equipment and wiring in extra hazardous areas where fire or explosion hazards may exist from flammable and combustible liquids, vapors, or gases.

Area Classification for Class I Locations by Donny Cook Area classification, for locations where combustible materials are processed or handled, is the analysis of a space to determine the likelihood of an ignitable mixture of flammable materials and oxygen. Intrinsic Safety by Paul Babiarz Intrinsic safety is the method of protection for control and instrumentation circuits where the nominal voltage is 24 VDC or less and the current is normally less than 100 mA.  The Danger of Voltage Gradients in the Aquatics Environment  by Bob Herzig Article 680 of NEC 2002 covers the swimming pool bonding grid that is an essential part of a safety aquatics complex.  Comparison of Division and Zone Systems by Paul Babiarz Electrical inspectors must be cognizant of the new zone classification system, understand the explosion-protective techniques, and sort out the differences in equipment and installations. Isolated Power Systems by Michael Johnston Isolated power systems utilized in health care facilities are not permitted to be grounded. Installation of Intrinsically Safe and Nonincendive Systems by Benjamin P. Schaefer and David Malohn With technology rapidly advancing, new developments in sensing and process control have increased the number of products using intrinsically safe or nonincendive circuits as their protection technique for hazardous locations.

Editorial: A Look at Resolutions, again! by James Carpenter, CEO/Executive Director As the year 2002 draws to a close and the new year comes before we know it, we traditionally reflect on what the past year has brought and what we expect for the next. Many of us make new year’s resolutions with good intentions of keeping them and making changes in our lives or work. I wonder what new year’s resolutions you will be making? May I suggest a few? What about resolving to gain more knowledge to help you in your job? The IAEI has many excellent educational programs to help you with this resolution. Canadian Code: The Canadian Electrical Code — More Changes by Leslie Stoch This article covers some changes in the rules for installing wiring and cables provided in the new 2002 edition of the Canadian Electrical Code. Other Code: NESC Substation Grounding — Part 2 by David C. Young, PE The almost two hundred pages and ninety five equations of IEEE Standard 80-2000 provide a well explained procedure for the design of safe and practical grounding systems for electric substations. Ask CSA: Taking on the Counterfeiters by Andrew Wagar, CSA International Counterfeit products can be found anywhere in today’s market. From t-shirts to sunglasses to circuit breakers to autos, no industry is safe from products bearing counterfeit logos and trademarks invading the shelves of retailers, wholesalers and distributors.

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