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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
enclosure are adequately secured to prevent loosening. Each component temperature class is
observed, identifying the hottest spot temperatures.
Powder Filling
Powder Filling ‘‘q’’ is an equipment protection technique that has fixed electrical components
that are totally encased or surrounded by filling material preventing ignition by excessive
surface temperatures of any enclosed or external explosive gas/vapor–air mixtures. The fill
material is normally quartz sand or solid glass beads. This application is typically limited to
small electrical components without moving parts, such as small transformers, capacitors, and
other similar components. There ...
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ISBN: 9780815520450