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A. c. electrical installations for voltage from 3 to 750 kV. Creepage distance of external insulation
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Electric energy. Electromagnetic compatibility of technical equipment. Power quality limits in the public power supply systems
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Switches for household and similar fixed electrical installations. Part 2-4. Particular requirements for isolating switches
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Electrical apparatus for use in the presence of combustible dust. Part 11. Protection by intrinsic safety 'iD'
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Varnished cloth. Methods for accelerated determination of thermal endurance
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