Table 1421 classes of protection against contact and

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Unformatted text preview: than 1)2) 1 mm (granular material) Protection against tools, wires et al. with a diameter grater than 1 mm 5 Protection against harmful dust deposits. The penetration of dust is not totally prevented: but dust is not able to penetrate in sufficient quantities to impair 3) operation (protected against dust) Complete protection against contact 6 1) Protection against penetration of dust (dust-proof) Complete protection against contact With equipment of protection classes 1 to 4, foreign bodies of even or uneven shape of three vertically aligned dimensions greater than the corresponding numerical value of the diameter are prevented from penetrating. 2) For protection classes 3 and 4, the implementation of this table with regard to equipment with drain holes or cooling air apertures falls within the responsibility of the individual technical committee responsible. 3) For protection class 5, the implementation of this table with regard to equipment with drain holes falls within the responsibility of the individual technical committee responsible...
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