Detail of GB/T 16895.2-2005

Introduction of GB/T 16895.2-2005

420.1 Scope This part of GB/T 16895 applies to electrical installations with regard to measures for the protection of persons, livestock and property against ——thermal effects, combustion or degradation of materials, and risk of burns caused by electrical equipment, ——flames in case of a fire hazard being propagated from electrical installations to other fire compartments segregated by barriers which are in the vicinity, and the impairment of the safe functioning of electrical equipment including safety services. Note: Protection against overcurrent is dealt with in IEC 60364-4-43. 420.2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 16895.18-2010 Electrical installations of buildings—Part 5-51: Selection and erection of electrical equipment—Common rules (IEC 60364-5-51: 2005, IDT) GB/T 16895.21-2011 Low-voltage electrical installations—Part 4-41: Protection for safety—Protection against electric shock (IEC 60364-4-41:2005, IDT) IEC 60332 (all parts) Tests on electric and optical fibre cables under fire conditions IEC 60598-2-24 Luminaires Part 2-24: Particular requirements—Luminaires with limited surface temperatures IEC 61084 (all parts) Cable trunking and ducting systems for electrical installations IEC 61386 (all parts) Conduit systems for cable management IEC 61534 (all parts) Powertrack systems IEC 61537 Cable management—Cable tray systems and cable ladder systems 420.3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 420.3.1 combustible capable of burning 420.3.2 fire ——a process of combustion characterized by the emission of heat and effluent accompanied by smoke, and/or flame and/or glowing ——rapid combustion spreading uncontrolled in time and space 420.3.3 flammability ability of a material or product to burn with a flame under specified test conditions 420.3.4 ignitability measure of the ease with which a specimen can be ignited due to the influence of an external source, under specified test conditions 420.3.5 ignition initiation of combustion Note: For more information see IEC 60695-4. 420.3.6 non-flam propagating component component which is liable to ignite, as a result of an applied flame, but in which the flame does not propagate and which extinguishes itself within a limited time after the flame is removed [IEC 60050-442:1998, 442-01-12]

Contents of GB/T 16895.2-2005

Foreword i 420.1 Scope 420.2 Normative references 420.3 Terms and definitions 421 Protection against fire caused by electrical equipment 422 Precautions where particular risks of fire exist 422.1 General 422.2 Conditions of evacuation in an emergency 422.3 Locations with risks of fire due to the nature of processed or stored materials 422.4 Locations with combustible constructional materials 422.5 Fire propagating structures 422.6 Selection and erection of installations in locations with endangering of irreplaceable goods 423 Protection against burns 424 Protection against overheating 424.1 Forced air heating systems 424.2 Appliances producing hot water or steam 424.3 Space heating appliances Bibliography