Electrical installations in hazardous areas. Electric lamps

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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 lamps

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

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7.3.76. In hazardous areas, electric lamps can be used, provided that the level of their explosion protection or the degree of protection correspond to Table. 7.3.12 or higher.

7.3.77. In rooms with explosive zones of any class with an environment for which there are no lamps of the required level of explosion protection, it is allowed to perform lighting with general-purpose lamps (without explosion protection) in one of the following ways:

a) through non-opening windows without transoms and vents, outside the building, and with single glazing of windows, the lamps must have protective glasses or glass casings;

b) through niches specially arranged in the wall with double glazing and niche ventilation with natural induction of outside air;

c) through lanterns of a special type with luminaires installed in the ceiling with double glazing and ventilation of the lanterns with natural induction by outside air;

d) in boxes purged under excess pressure with clean air. In places where glass breakage is possible, unbreakable glass should be used for glazing boxes;

e) using lighting devices with slotted light guides.

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

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