ISO INTERNATIONAL STANDARD 8056-2 First edition 1988-10-01 INTERNATIONALORGANIZATIONFORSTANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEKAYHAPOAHAR OPTAHM3ALMANO CTAHAAPTW3ALMM Aircraft - Nickel-chromium and nickel-aluminium thermocouple extension cables : Part 2 : Terminations - General requirements and tests Aeronefs - Cables de compensation de couples thermoelectriques en nickel-chrome et en nickel-aluminium Partie 2 : Raccordements - Exigences generales et essais Referencenumber ISO 8056-2 : 1988 (E) ISO 8056-2 : 1988 (E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (Iso member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. ISo collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. They are approved in accordance with IsO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 8056-2 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles. Users shouid note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. ? International Organization for Standardization, 1988 Printed in Switzerland ISO 8056-2 : 1988 (E) INTERNATIONAL STANDARD Aircraft - Nickel-chromium and nickel-aluminium thermocouple extension cables Part 2 : Terminations - General reguirements and tests O Introduction 3.1 crimped joint : A permanent connection formed by crimping a terminal end or in-line splice of an appropriate This International Standard on nickel-chromium and nickel- thermocouple material, for example nickel-chromium or nickel- aluminiumthermocoupleextension cablesforusein aircraft aluminium, to its matching conductor. comprises the following four parts : Part 1 : Conductors -- General requirements and tests. 3.2 terminal end : A connecting device, of an appropriate Part 2 : Terminations - General requirements and tests. thermocouple material,withabarrel accommodatingthe con ductorofathermocoupleextensioncable,withorwithoutad Part 3 : Crimp-type ring terminal ends -- Dimensions. ditional provision to accommodate the insulation of the cable. A permanent joint between conductor and terminal is made, Part 4 : Crimp-type butt connectors - Dimensions. and the cable insulation may be secured, by using a crimping tool. Scope and field of application This part of Iso 8056 specifies the design requirements and 3.3 termination : A terminal end or in-line splice. tests forthe crimping of non-insulatedterminations,of nickel- chromium ornickel-aluminium alloy,to the standard flexible conductors of nickel-chromium or nickel-aluminium thermo- couple extension cables,respectively,in suchamannerthat crimping:Thephysicalcompressionordeformationofa the thermoelectric integrity and constancy of resistance of a conductor barrel round a conductor to make a mechanical and thermocouple circuit are contained within specified limits. electrical connection. Although the metallic materials used in the crimped joint will be the same for all groups, the limiting temperature of use of the 3.5 insulation support : That part of a terminal barrel into crimped joint is defined by the insulation of the cable and will which the insulation of the cable is inserted and that, by fall within one of the following groups : 105