Electrical installations in hazardous areas. Electric hoists

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Section 7. Electrical equipment of special installations

Electrical installations in hazardous areas. Electric hoists

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Encyclopedia of radio electronics and electrical engineering / Rules for the installation of electrical installations (PUE)

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7.3.73. The electrical equipment of cranes, hoists, elevators, etc., located in explosive zones of any class and participating in the technological process, must meet the requirements of Table. 7.3.10 and 7.3.11 for mobile units.

7.3.74. The electrical equipment of cranes, hoists, elevators, etc. located in hazardous areas and not directly connected with the technological process (for example, assembly cranes and hoists) must have:

a) in explosive zones of classes VI and B-II - any level of explosion protection for the corresponding categories and groups of explosive mixtures;

b) in explosive zones of classes B-Ia and B-II - any level of explosion protection for the corresponding categories and groups of explosive mixtures;

c) in explosive zones of classes B-Ia and B-Ib - the degree of protection of the shell is not less than IРЗЗ;

d) in explosive zones of classes B-IIa and B-Ig - the degree of protection of the shell is not less than IP44.

The use of the specified electrical equipment is allowed only if there are no explosive concentrations during the operation of the crane.

7.3.75. Current leads to cranes, hoists, etc. in hazardous areas of any class must be carried out with a portable flexible cable with copper conductors, with rubber insulation, in a rubber oil and petrol resistant sheath that does not spread combustion.

See other articles Section Rules for the installation of electrical installations (PUE).

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