A Look at Resolutions, again!

As the year 2002 draws to a close and the new year comes before we know it, we traditionally reflect on what the past...

Intrinsic Safety

Intrinsic safety is the method of protection for control and instrumentation circuits where the nominal voltage is 24 VDC or less and the current...

Comparison of Division and Zone Systems

There are two significant changes that electrical inspectors must be cognizant of with the new zone classification system. First, all zone-rated equipment can be...

Area Classification for Class I Locations

Area classification, for locations where combustible materials (flammable gases or vapors, flammable liquids, or combustible liquids) are processed or handled, is the analysis of...

The Canadian Electrical Code – More Changes

This article covers some changes in the rules for installing wiring and cables provided in the new 2002 edition of the Canadian Electrical Code. In...

Installation of Intrinsically Safe and Nonincendive Systems

With technology rapidly advancing, new developments in sensing and process control have increased the number of products using intrinsically safe or nonincendive circuits as...

Understanding the Zone Area Classification Method in the NEC

The division classification method has been used in the United States since being incorporated into NEC 1920 to cover electrical and electronic equipment and...

NESC Substation Grounding – Part 2

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...