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Monthly Archives: November 2002

Nonincendive Equipment for Use in Hazardous (Classified) Locations

What is nonincendive equipment? Section 500.7(F) of the National Electrical Code explains that it is a protection technique for equipment installed in Class I,...

The Danger of Voltage Gradients in the Aquatics Environment

Hidden beneath the glamour and excitement of an aquatics complex is a detailed and essential safety system. This frequently misunderstood network is the swimming...

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...

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...

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...

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...

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...

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...

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...
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