William Andrew (January 14, 1996) | 0815513666 | Pages: 442 | RARed multiple PDF chapters | 20.41 MB
The degree of danger in the atmosphere of a hazardous location needs to be determined prior to selecting an acceptable electrical equipment installation. If maximum safety is the predominant factor in determining the type of electrical installations, the cost of electrical equipment will be extremely high. If low cost of electrical installation
is the predominant factor, safety to personnel and equipment may be
unacceptably low. It is, therefore, necessary to find a point of balance
at which the cost and safety requirements
are both satisfied and acceptable. In nine out of ten cases, a
hazardous location is classified much too conservatively. The reason for
this conservative approach is a lack of knowledge and a
misunderstanding of the actual concept of safety and danger. This book
provides an in-depth understanding of the factors that influence the
classification of a hazardous location. One factor, in combination with
one or more other factors, will have an impact on the level of danger
and its hazardous boundaries. These factors and their influences are
explained in detail, and once their impact is understood, the
classification of a hazardous location becomes a straightforward
procedure.
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