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Low voltage systems. Cable systems. Horizontal subsystem of structured cable system. Basic principles

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Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1100 V. Part 2-16. Particular requirements and tests for switch mode power supply units and transformers for switch mode power supply units

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Self-tapping countersunk head and sharpening endscrews for metals and plastics. Construction and dimensions

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State system for ensuring the uniformity of measurements. BU-type viscosimeters. Verification procedure

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Auxiliary compounds for textiles. Sulfirol-8. Specifications

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Luminaires. Part 2-1. Particular requirements. Fixed general-purpose luminaires

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