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Electrical Codes, Standards, Recommended Practices and Regulations
book

Electrical Codes, Standards, Recommended Practices and Regulations

by Robert J. Alonzo
January 2010
Intermediate to advanced content levelIntermediate to advanced
512 pages
18h 35m
English
William Andrew
Content preview from Electrical Codes, Standards, Recommended Practices and Regulations
A heat source
Establishment of an uninhibited chemical chain reaction
If any of the above components are removed or are not present, combustion cannot occur.
Fuel and the oxidization agent must be present in a specific range of concentrations,
i.e. percentage of fuel present per volume of air. Fuel-air mixtures in ratios above or below that
range will not ignite. The limits of those ranges are defined as the lower explosive limit (LEL)
and the upper explosive limit (UEL). The heat source component can be in the form of an
electrical arc or spark, an open flame, a chemical reaction, or heated surfaces.
Any heat source must have an adequate energy level ...
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ISBN: 9780815520450