3282 NTERNATIONAL STANDARD (SO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEKAYHAPOIHA OPTAHY3AIMS IIO CTAHIAPTM3ALIWM.ORGANISATION INTERNATIONALE DE NORMALISATION Aircraft - Dimensions for single-hole and triple-hole mounting (Class 3) lever-operated manual switches Aeronefs --Dimensions des interrupteurs a leviera commande manuelle,avec fixation par un ou trois trous (Classe 3) First edition -- 1976-02-01 176 ISO 3282-1976 (E) UDC 629.7 : 621.316.54 Ref. No. ISO 3282-1976 (E) Descriptors : aircraft equipment, aircraft controls, toggte switches, manuat controls, dimensions. Price based on 2 pages Copyright International Organization for Standardization ted without license from IHS Not for Resale FOREWORD IsO (the International Organization for Standardization) is a worldwide federation of national standards institutes (ISO Member Bodies). The work of developing International Standards is carried out through ISO Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set up has the right to be represented on that Committee. fnternational organizations, governmental and non-governmental, in liaison with IsO, also take part in the work. Draft Internationa! Standards adopted by the Technical Committees are circulated to the Member Bodies for approval before their acceptance as International Standards by the ISO Council. International Standard ISO 3282 was drawn up by Technical Committee ISO/TC 20, Aircraft and space vehicles, and circutated to the Member Bodies in December 1973. It has been approved by the Member Bodies of the following countries : Belgium Japan Thailand Canada Netherlands Turkey Czechoslovakia U.S.A. New Zealand Egypt, Arab Rep. of Romania U.S.S.R. Germany* South Africa, Rep. of Yugoslavia Itaiy Spain *With the exception of dimension D. The Member Bodies of the following countries expressed disapproval of the document on technical grounds : France United Kingdom @ International Organization for Standardization, 1976 Printed in Switzerland Copyright International Organization for Standardization Not for Resale ISO 3282-1976 (E) INTERNATIONAL STANDARD Aircraft - Dimensions for single-hole and triple-hole mounting (Class 3) lever-operated manual switches 1 SCOPE AND FIELD OF APPLICATION table, shall be mounted directly on the underside of the panel with mounting holes and switch lever apertures which This International Standard gives the overail dimensions, shall be in accordance with figure 2a). inctuding terminal screws, for single-hole and triple-hole mounting (Class 3) lever-operated manual switches, having thecharacteristics specified inISO3456,Aircraft TABLE -- Dimensions Lever-operated manual switches fClass 3) - Performance requirements. Dimension mm in A 48,3 max. 1.9 max. 2 DIMENSIONAL REQUIREMENTS 19,0 max. Single-pole 0.748 max. 2.1 The overall dimensions, including terminal screws, 1.02 max. Double-pole 25,9 max. shall be in accordance with figure 1 and the table. The B Three-pole 35,1 max. 1.38 switch shall have at the centre of the front face of the case max. a 12 mm diameter male thread of 1 mm or equivalent pitch Four-pote 46,0 max. 1.81 max. for fixing to the mounting panel. The holes in the c 1.35 max. 34,3 max. 0.484 max. D 12,3 max. The smaller hole of diameter 3 mm, together with a keyway E* 23,8 ± 1,6 0.938 ± 0.06 washer, which also locates in a keyway in the switch mounting bush, shall be used to prevent rotation of the + 3°30' 18° switch, and shall orientate the switch correctly. 6°30' 2.2 Alternatively, where a tripile-hole mounting is A lever length of 17,5 ± 0,8 mm (0.688 ± 003 in) is acceptable required, the switch body, as shown in figure 2 and the but non-preferred. A D Φ 3 mm (0.12 in) min. Φ 12,5 mm (0.492 in) FIGURE 1a) - Panel drilling FIGURE 1 - Dimensions for single-hole mounting switch Copyright International Organization for Standardization efrom IHS Not for Resale