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Optical fibres - Product specifications - Sectional specification for class C single-mode interconnection fibres. Original standard BS EN IEC 60793-2-60-2025 in PDF full version. Additional info + preview on request

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Optical fibre cables - Part 1-130: Generic specification - Basic optical cable test procedures - Mechanical tests methods - Coefficient of friction between cables, Methods E30. Original standard BS EN IEC 60794-1-130-2025 in PDF full version. Additional info + preview on request

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Electromechanical equipment guidance for small hydroelectric installations. Original standard BS EN IEC 61116-2025 in PDF full version. Additional info + preview on request

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Materials for printed boards and other interconnecting structures Part 2-52: Reinforced base materials clad and unclad - Thermosetting hydrocarbon resin system, woven E-glass reinforced laminate sheets of defined flammability (vertical burning test), copper-clad. Original standard BS EN IEC 61249-2-52-2025 in PDF full version. Additional info + preview on request

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Wind energy generation systems - Part 12-3: Power performance - Measurement based site calibration. Original standard BS EN IEC 61400-12-3-2022 (2025) in PDF full version. Additional info + preview on request

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Low-voltage surge protective devices - Part 11: Surge protective devices connected to AC low-voltage power systems - Requirements and test methods. Original standard BS EN IEC 61643-11-2025 + A11-2025 in PDF full version. Additional info + preview on request

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