1、 64/1531/CD COMMITTEE DRAFT(CD)IEC/TC or SC:TC 64 Project number IEC 60364-4-42,Ed.3 Title of TC/SC:Electrical installations and protection against electrical shock Date of circulation 2006-05-05 Closing date for comments 2006-08-11 Also of interest to the following committees Supersedes document 64
2、/1483/CD,64/1530/CC Functions concerned:Safety EMC Environment Quality assurance Secretary:Mr.R.Pelta(Germany)E-mail: THIS DOCUMENT IS STILL UNDER STUDY AND SUBJECT TO CHANGE.IT SHOULD NOT BE USED FOR REFERENCE PURPOSES.RECIPIENTS OF THIS DOCUMENT ARE INVITED TO SUBMIT,WITH THEIR COMMENTS,NOTIFICATI
3、ON OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.Title:IEC 60364-4-42,Ed.3:Low-voltage electrical installations-Part 4-42:Protection for safety-Protection against thermal effects(Titre):Introductory note FORM CD(IEC)2002-05-14 Copyright 2006 Internatio
4、nal Electrotechnical Commission,IEC.All rights reserved.It is permitted to download this electronic file,to make a copy and to print out the content for the sole purpose of preparing National Committee positions.You may not copy or mirror the file or printed version of the document,or any part of it
5、,for any other purpose without permission in writing from IEC.2 64/1531/CD LOW-VOLTAGE ELECTRICAL INSTALLATIONS Part 4-42:Protection for safety Protection against thermal effects FORWARD Please refer to Annex B for additional requirements in Germany.420.1 Scope This standard applies to electrical in
6、stallations with regard to measures for the protection of persons,livestock and property.-against thermal effects occurring from electrical equipment,-against flames in case of a fire hazard being propagated from electrical installations to other fire compartments segregated by barriers which are in
7、 the vicinity,and-against the impairment of the safe functioning of electrical equipment including safety services.NOTE 1 For protection against thermal effects national statutory requirements may be applied.NOTE 2 Protection against overcurrent is dealt with in IEC 60364-4-43.420.2 Normative refere
8、nces The following normative documents contain provisions which,through reference in this text,constitute provisions of this part of IEC 60364.For dated references,subsequent amendments to,or revisions of,any of these publications do not apply.However,parties to agreements based on this part of IEC
9、60364 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below.For undated references,the latest edition of the normative document referred to applies.Members of IEC and ISO maintain registers of currently valid International Stand
10、ards.IEC 60079-14:1996,Electrical apparatus for explosive gas atmospheres Part 14:Electrical installations in hazardous areas(other than mines)IEC 60332-1:1993,Tests on electric cables under fire conditions Part 1:Tests on a single vertical insulated wire or cable IEC 60332-3-10:2000,Tests on electr
11、ic cables under fire conditions Part 3-10:Test for vertical flame spread of vertically-mounted bunched wires or cables Apparatus IEC 60332-3-21:2000,Tests on electric cables under fire conditions Part 3-21:Test for vertical flame spread of vertically-mounted bunched wires or cables Category A F/R IE
12、C 60332-3-22:2000,Tests on electric cables under fire conditions Part 3-22:Test for vertical flame spread of vertically-mounted bunched wires or cables Category A IEC 60332-3-23:2000,Tests on electric cables under fire conditions Part 3-23:Test for vertical flame spread of vertically-mounted bunched
13、 wires or cables Category B IEC 60332-3-24:2000,Tests on electric cables under fire conditions Part 3-24:Test for vertical flame spread of vertically-mounted bunched wires or cables Category C IEC 60332-3-25:2000,Tests on electric cables under fire conditions Part 3-25:Test for vertical flame spread
14、 of vertically-mounted bunched wires or cables Category D 3 64/1531/CD IEC 60364-4-41:Electrical installations of buildings Part 4-41:Protection for safety Protection against electric shock IEC 60364-4-43:Electrical installations of buildings Part 4-43:Protection for safety Protection against overcu
15、rrent IEC 60364-5-51:Electrical installations of buildings Part 5-51:Selection and erection of electrical equipment Common rules IEC 60614(all parts),Conduits for electrical installations 420.3 General Requirements Persons,livestock and properties shall be protected against damages caused by heat/fi
16、re which may be generated or propagated in electrical installations by taking into account the requirements of this standard and the instructions of equipment manufacturers.The heat generated by electrical equipment shall not cause danger or harmful effects to adjacent fixed material or to material which may foreseeably be in proximity to such equipment.NOTE Damage or ignition may be caused by:-Heat accumulation,heat radiation,hot elements-Reduction of the safe function of electrical equipment,e
