1、BRITISH STANDARD AEROSPACE SERIES BS G 222:1976 Incorporating Amendment Nos.1,2 and3 Specification for Efglas type electric cables (metric units) UDC 629.7.064.5:621.315.211BSG222:1976 This BritishStandard, having been prepared under the directionof the Aerospace Industry Standards Committeewas publ
2、ished underthe authority of the Executive Board on 30July1976 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference ACE/6 Draft for comment 74/73799 DC ISBN 0 580 09404 9 Foreword This BritishStandard has been prepared to provide a range of cables based on
3、 the same construction as Efglas cables specified in G192:1965 but having dimensions and test measurements in metric units. These dimensions and measurements are not in all cases the exact equivalent of the imperial units, but cables of the same size number from22 to12 inclusive will be normally int
4、erchangeable. This standard is intended to be read in conjunction with G212 “General requirements for aircraft electrical cables”, which specifies the general requirements and test methods for this range of cables. A British Standard does not purport to include all the necessary provisions of a cont
5、ract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to11 and a back cover. Thi
6、s standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date of issue Comments 3012 December 1979 3819 December 1981 6188 December 1990 Indicated b
7、y a sideline in the marginBSG222:1976 BSI 12-1999 i Contents Page Foreword Inside front cover Section 1. General 1 Scope 1 2 References 1 3 Requirements 1 Section 2. Efglas cables 4 Construction 1 5 Identification 2 6 Duefglas and Triefglas cables 2 7 Designation of the cable 3 8 Packaging and label
8、ling 3 9 Tests 3 10 Efglas test schedule 3 11 Du-and Triefglas test schedule 4 Section 3. Efglasmet cables 12 Construction 4 13 Identification 4 14 Designation of the cable 4 15 Packaging and labelling 4 16 Tests 4 17 Efglasmet test schedule 5 Section 4. Efglasmetsheath cables 18 Construction 5 19 I
9、dentification 6 20 Du-and Triefglasmetsheath cables 6 21 Designation of the cable 6 22 Packaging and labelling 6 23 Tests 6 24 Efglasmetsheath, Du-and Triefglasmetsheath test schedule 7 Section 5. Efglaslarge cables 25 Construction 8 26 Identification 8 27 Colour fastness 8 28 Designation of the cab
10、le 8 29 Packaging and labelling 8 30 Tests 8 31 Efglaslarge test schedule 8 Appendix A Maximum long-term current ratings for Efglas cables at an ambient temperature of220 C 11 Table 1 Details of Efglas cables 2 Table 2 Details of Efglasmet cables 5 Table 3(a) Details of Efglasmetsheath cables 6 Tabl
11、e 3(b) Details of Du-and Triefglasmetsheath cables 7 Table 4 Details of Efglaslarge cables 9 Table 5 Abrasion test weights and minimum length of abrasion tape 10 Table 6 Thickness of nickel on copper conductors and braiding wires 10 Table 7 Resistance to fluids 10ii blankBSG222:1976 BSI 12-1999 1 Se
12、ction 1. General 1 Scope 1.1 This BritishStandard states the requirements for Efglas type cables for aircraft wiring which are suitable for continuous use where the maximum stabilized conductor temperature does not exceed260 C. The cables remain flexible at temperatures down to70 C. 1.2 The cables d
13、o not support combustion but they do not comply with the requirements of3G100in respect of fire resistance. 1.3 The cables are suitable for use where the potential between conductors or between a conductor and screen or the aircraft structure does not exceed600volts(r.m.s.) and the frequency does no
14、t exceed1600Hz. 1.4 The maximum current ratings for Efglas cables are shown in Appendix A. 2 References Reference is made in this standard to the following BritishStandards: 3G100, General requirements for equipment for use in aircraft Part2: All equipment. 3G100-3, Environmental conditions. Subsect
15、ion3.12. Fluid contamination. G212, General requirements for aircraft electrical cables. G230, Specification for general requirements for aircraft electrical cables (second series). 3 Requirements The cables shall comply with the requirements specified in the relevant sections of this standard and w
16、ith the related requirements of G212 to which reference is made. 3A Abbreviation of cable name If necessitated by the limited length of legend that the manufacturer is able to print with existing equipment, EFGLASMETSHEATH may be abbreviated to FGMETSH, DUEFGLASMETSHEATH and TRIEFGLASMETSHEATH to2FG
17、METSH and3FGMETSH respectively, and EFGLASLARGE to FGLARGE. Section2. Efglas cables G212 clause 4 Construction As shown in the illustration to Table 1. 1.4 4.1 Conductors. Nickel-plated copper, concentric stranded for sizes22 to10 inclusive andropestranded for sizes8 to0000 inclusive. 1.3.1 4.2 Insu
18、lation 1.3.3 PTFE Fibrous glass tapes which shall contain not less than50% of PTFE by weight of coated tape. 1.3.3 Fibrous glass yarns which shall be coated with PTFE to the extent of not less than15% byweight of the coated yarn. Filling factor shall be not less than0.7. 1.3.4 1.7 a Lay factor shall
19、 be not less than1.2. 1.7 a The insulation shall consist of a layer of PTFE adjacent to the conductor and of subsequent layersofPTFE and PTFE-impregnated glass braids or tapes which are subsequently heated tobecome a compact mass. The outer surface of the cable may present itself either as a lapped
20、PTFEtape which shall be finally sintered, or as an extruded PTFE layer. The colour shall be white. a Braiding details. The values of d w(effective glass width) and d r(effective radial depth) for glass yarn sizes in common use areasfollows Glass yarn EC5111/2(450/1/2) EC7221/3(225/1/3) d w(inmm) 0.2
21、3 0.41 d r(inmm) 0.08 0.16 The formulae for calculating the braiding details are given in Appendix A of G212.BSG222:1976 2 BSI 12-1999 5 Identification 6 Duefglas and Triefglas cables 6.1 These cables shall consist of two or three Efglas cables of the same size, twisted together witha right-hand lay
22、 of approximately12; times the pitch circle diameter for sizes22 to4 and approximately16times the pitch circle diameter for sizes2 to0000. Table 1 Details of Efglas cables G212 clause The cable name shall be Efglas. (See clause4 of BritishStandard G230.) 1.8 6.2 Core identification 1.5 6.3 Colour fa
23、stness 1.6 Cable size Nominal conductor area Conductor number and nominal dia. of wires mm Conductor diameter Overall diameter of finished cable Maximum conductor resistance at20 C 7/km Mass mm 2a Circular mils b (ref. only) min. mm max. mm min. mm max. mm nom. (ref.only) g/m max. g/m 22 20 18 16 14
24、 12 10 8 6 4 2 1 0 00 000 0000 0.336 0.597 0.933 1.34 1.82 2.89 4.65 8.41 12.85 20.75 32.30 39.00 51.20 66.80 82.50 105.70 663 1180 1840 2650 3580 5690 9170 16600 25390 41010 63720 76900 101070 131830 162580 208720 19/0.15 19/0.2 19/0.25 19/0.3 37/0.25 37/0.32 37/0.40 17/7/0.30 26/7/0.30 42/7/0.30 2
25、9/7/0.45 35/7/0.45 46/7/0.45 c 60/7/0.45 74/7/0.45 35/19/0.45 0.70 0.95 1.20 1.45 1.68 2.12 2.70 4.05 5.10 6.45 8.00 9.00 10.20 11.40 12.90 14.20 0.80 1.05 1.30 1.55 1.82 2.28 2.90 4.40 5.45 6.94 8.54 9.39 10.78 12.32 13.68 15.66 1.65 1.90 2.15 2.40 2.65 3.25 4.25 5.75 6.30 8.45 10.15 11.20 12.40 13
26、.70 15.30 16.80 2.05 2.30 2.55 2.80 3.10 3.75 4.75 6.25 7.30 9.15 10.85 11.90 13.15 14.45 16.05 17.55 61.3 33.6 21.2 14.6 10.7 6.44 4.08 2.28 1.49 0.924 0.585 0.485 0.369 0.283 0.229 0.179 8.2 11.6 15.2 19.6 25.2 36.9 64.0 102 165 264 403 475 600 765 960 1210 8.6 12.2 16.0 20.6 27 39 66.0 106 174 27
27、8 424 500 632 805 1010 1270 a Calculated on the basis of the formula , where d =nominal diameter of each individual wire in millimetres, and n =number of individual wires in the conductor. b Calculated on the basis of the formula d 2n, where d =nominal diameter of each individual wire in mils1mil=0.
28、001in(0.0254mm), and n =number of individual wires in the conductor. Given for reference in relation to inch-dimensioned crimped terminations. c 46/7/0.45 represents a rope comprising46 elements of7 strands each of0.45mm diameter. nd 2 4 -BSG222:1976 BSI 12-1999 3 Group1. Efglas22 to16 Group2. Efgla
29、s14 and12 Group3. Efglas10 to2 Group4. Efglas1 to0000 10 Efglas test schedule Type approval tests are covered by test10.1 to test10.21 Production quality tests are covered by test10.1 to test10.12 Production routine tests are covered by test10.1 to test10.4 G212 clause 7 Designation of the cable 1.9
30、 8 Packaging and labelling Sizes8 to0000 may be supplied in minimum lengths of50m. 1.10 9 Tests 2.1 9.1 The following groups shall apply for type test sampling: 2.1(1) Test no. Property or test Requirement of this specification G212 clause 10.1 Construction Table 1 and clause4 2.20 10.2 Identificati
31、on, packaging and labelling 2.26 10.3 Conductor resistance Table 1 2.25 10.4 Spark test on completed cable 6000volts(r.m.s.) Size22 to4 8000volts(r.m.s.) Size2 to0000 2.24 10.5 Voltage test 2000volts(r.m.s.) 2.21 10.6 Insulation resistance 500voltsd.c.,100M7 2.22 10.7 Flammability Five specimens,15s
32、 application of flame. Burning time10smax. burn length76mm 2.27 10.8 Abrasion Table 5 2.15.1 and/or 2.15.2 10.9 Conductor physical 0.15mm to0.29mm wireu 300MN/m 2 W 9%,0.30 to0.51mm wireu 300MN/m 2 W 13.5% 2.32 10.10 Visual inspection of wires No visible defects 2.34 10.11 Plating tests for wires Ta
33、ble 6 2.36 10.12 Shrinkage Five cycles from room temperature to275 5 C, holding the top temperaturefor1h and allowing the cableto return to room temperature between cycles. Maximum at each end:3mm sizes2210, D a , sizes80000 2.31 10.13 Check voltage 1500volts (r.m.s.) 2.2 10.14 Voltage at high tempe
34、rature 311 C to316 C for120h1500volts (r.m.s.)30min 2.3 10.15 Resistance to fluids Table 7 loop dia.6 D a (6) 5% 2.4 Procedure(1) 2.4.1BSG222:1976 4 BSI 12-1999 11 Du-and Triefglas test schedule 11.1 The cores of these cables shall comply with the requirements of clause10 plus ohmic resistanceinacco
35、rdance with Table 3(b). Section 3. Efglasmet cables 12 Construction 13 Identification Test no. Property or test Requirement of this specification G212 clause 10.16 Ageing in air 311 C to316 C for120h. followed by test10.13 2.6 10.17 Surface creepage 50 2 C for24h0.2 milliamp, 1400volts d.c. 2.9 10.1
36、8 Low temperature 75 2 C,6h 2.10 10.19 Flexibility Load2.5kg sizes22 to1 Load4.5kg sizes0 to0000 Mandrel3 D a , sizes2210 Mandrel6 D a , sizes80000 2.13 10.20 Climatic Dry heat90 2 C Cold65+010 C Extra cold75+010 C Insulation resistance5 M7/1000m 2.14 10.21 Current ratings Appendix A (No data at pre
37、sent available for short termratings) Appendix F a D is the maximum specified overall diameter of the cable. As shown in illustration to Table 2. 1.4 12.1 Core. Shall meet the requirements of Section2. 1.3.1 12.2 Metal braid. Nickel-plated copper The braids shall be close fitting but whenever a sing
38、le core is cut it shall be possible to slidethe metal braid back by hand a distance of100mm in a length of600mm, one end ofthe cable being clamped The braid shall subsequently be capable of being returned to within25mm of the free end of the cable. There shall be not more than one break in any25mm o
39、f cable nor more than one spindle renewal in any300mm of cable. Thereshallbe no joints in the complete braid. G212 clause The filling factor shall be not less than0.6 1.7 The lay factor shall not exceed3.0 1.7 The cable name shall be Efglasmet, but printed identification shall be as for Efglas cable
40、s. 1.8 a 14 Designation of the cable 1.9 15 Packaging and labelling 1.10 16 Tests 2.1 16.1 The following group shall apply for type test sampling: Group1. Efglasmet22 to10 a See also clause3A of this standardBSG222:1976 BSI 12-1999 5 17 Efglasmet test schedule The core used in these cables shall sat
41、isfy the requirements of section2 of this specification andthecompleted Efglasmet cable shall satisfy this additional test schedule. Type approval tests are covered by test17.1 to test17.9 Production quality tests are covered by test17.1 to test17.6 Production routine tests are covered by test17.1 t
42、o test17.4 Table 2 Details of Efglasmet cables Test no. Property or test Requirement of this specification G212 clause 17.1 Construction Table 2 and clause12 2.20 17.2 Identification, packaging and labelling 2.26 17.3 Conductor resistance Table 1 2.25 17.4 Voltage test on completed cable 2000volts (
43、r.m.s.) 2.24 17.5 Visual inspection of wires No visible defects 2.34 17.6 Plating tests for wires Table 6 2.36 17.7 Check voltage 1500volts (r.m.s.) 2.2 17.8 Voltage at high temperature 311 C to316 C for120h1500volts (r.m.s.) for30min 2.3 17.9 Ageing in air 311 C to316 C for120h, followed by test17.
44、7 2.6 Cable size Diameter of braiding wire mm Overall diameter Mass Maximum conductor resistance at20 C 7/km min. mm max. mm nom. (ref. only) g/m max. g/m 22 20 18 16 14 12 10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 2.15 2.40 2.65 2.90 3.15 3.75 4.75 2.55 2.80 3.05 3.30 3.60 4.25 5.25 17.30 21.70 26.20 3
45、7.30 42.70 60.20 90.40 18.60 23.30 28.10 40.10 45.70 64.40 96.80 61.3 33.6 21.2 14.6 10.7 6.44 4.08 Section4. Efglasmetsheath cables G212 clause 18 Construction As shown in illustrations to Table 3(a) and Table 3(b). 1.4 18.1 Core. Shall meet the requirements of section2. 18.2 Metal braid. Shall mee
46、t the requirements of section3. 18.3 Sheath. The sheath of the cable may present itself either as a lapped PTFE tape, which shallbe finally sintered, or as an extruded PTFE layer. The colour shall be white. 1.3.5BSG222:1976 6 BSI 12-1999 19 Identification 20 Du-and Triefglasmetsheath cables 20.1 Con
47、struction. The cables shall consist of Duefglas or Triefglas cables, with phase identification,butwith or without size identification, to which has been added a protective layer ofpresintered PTFE tape, an overall metal braid, complying with section3, and an outer sheath complyingwith18.3. The diame
48、ters over braid and over sheath shall be as shown in Table 3(a) and the sizesofthese cables shall be restricted to those shown in this table. Glass yarn fillers may be usedinthemake-up of these cables in order to obtain a circular shape. Group1. Efglasmetsheath22 to12 Group2. Du- and Triefglasmetshe
49、ath22 to16 Table 3(a) Details of Efglasmetsheath cables G212 clause The cable name shall be Efglasmetsheath. 1.8 a a See also clause 3A of this standard. 20.2 Core identification 1.5 20.3 Colour fastness 1.6 21 Designation of the cable 1.9 22 Packaging and labelling 1.10 23 Tests 2.1 23.1 The following groups shall apply for type test sampling. 2.1(1) Cable size Diameter of braiding wire mm Nominal jacket thickness mm Overall diameter Mass Maximum conductor resistance at20 C 7/km min. mm max. mm
