-
Conduits located in a pressurized compartment
-Moving conduits which allow moisture to drain
-
Small conduits, size code 02, 03 and 04
-
Small conduits used inside overbraided bundles
(1)
For shielded conduits For shielded conduits which are made of convoluted conduit, the drain hole his made during manufacture with a specific tool before delivery and installation. Drain holes or drain hole zones are identified on either side by yellow sleeves.
(2)
For non-shielded conduits Drain holes will be made after installation of the conduit at the lower point. (Refer to 20-25-52 Wire protection tool for detailed process)
20-33-30 Page 10
Oct 01/04
R
Wire Protection - Draw Wire
Figure 002
20-33-30 Page 11
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CONVOLUTED CONDUIT - DESCRIPTION AND OPERATION
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1. General
R This chapter gives the description and operation for convoluted conduits. Convoluted conduits are items used for segregation (arc-tracking protection), mechanical or fluid protection. (For more information about conduit selection, refer to chapter 20-33-30). The main convoluted conduits installed on aircraft have the following codes:
-E0432
-NSA935805
-NSA935806
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2. Description
R This type of conduit is convoluted with a greater bend radius than a flexible conduit. They are made with PTFE and some sizes could be supplied with a braided metal (rustproof steel) external sheath. In most cases, they are regular black colored.
____
NOTE : Conduit delivery with continuous drain holes is only with metallic braiding. E.g. NSA935805T and NSA935806T (Refer to chapter 20-33-32 -Metallic conduit).
A. E0432
(Ref. Fig. 001)
(1) P/N identification
E0432 A 10 A | | | | | | | --- Type code : A code = specification ABS0746 (conduit with | | | drain hole) | | | Without code = specification E0759 (conduit | | | without drain hole) | | | | | ------- Size code | | | ---------- Material code (A code = PTFE) | --------------- Standard P/N
20-33-31 Page 1
Convoluted Conduits - Description
EO432, NSA935805 and NSA935806
Figure 001
20-33-31 Page 2
(2) P/N Characteristics
(a) Temperature Minimum operating temperature is -55 deg.C (-67.00 deg.F) Maximum operating temperature is 260 deg.C (500.00 deg.F)
(b) Size code --------------------------------------- ---------------------------------------| Size | Dia. interior D | Max. Bend | | Size | Dia. interior D | Max. Bend | | code | mm.(in.) | Radius | | code | mm.(in.) | Radius | |-------------------------------------| |-------------------------------------| | 04 | 3 (0.1181) | 13 | | 16 | 12.3 (0.4842) | 43 | |-------------------------------------| |-------------------------------------| | 06 | 4.6 (0.1811) | 16 | | 20 | 15.6 (0.6141) | 54 | |-------------------------------------| |-------------------------------------| | 09 | 7 (0.2755) | 28 | | 24 | 19 (0.7480) | 65 | |-------------------------------------| |-------------------------------------| | 10 | 7.6 (0.2992) | 30 | | 28 | 21.8 (0.8582) | 71 | |-------------------------------------| |-------------------------------------| | 12 | 9.2 (0.3622) | 33 | | 32 | 24.5 (0.9645) | 76 | |-------------------------------------| |-------------------------------------| | 14 | 10.8 (0.4251) | 39 | | 40 | 31.7 (1.2480) | 98 | --------------------------------------- ---------------------------------------
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B. NSA935805
(Ref. Fig. 001)
(1) P/N identification NSA935805 T 10 A
R R R R | | | | | | | -- Type code: A code (*) = specification ABS0746 | | | (conduit with drain hole) | | | Without code = conduit without drain hole | | | | | ----- Size code | | | --------- Conduit code : S code = with metallic braid (20/100) | T code = with metallic braid (25/100) | Dash (-) code = Without braid | ---------------- Standard P/N (*) Type code A (conduit with drain hole) not applicable for size codes 02,03,04.
(2) P/N Characteristics
(a) Temperature Minimum operating temperature is -55 deg.C (-67.00 deg.F) Maximum operating temperature is 260 deg.C (500.00 deg.F)
(b) Size code
20-33-31 Page 4
-------------------------------------- ----------------------------------------|Size|Dia. interior| Max.Bend | |Size| Dia. interior | Max. Bend | |code| D | Radius | |code| D | Radius | | | mm.(in.) |bare(with sheath)| | | mm.(in.) |bare(with sheath)| |------------------------------------| |--------------------------------------| | 02 | 1.4 (0.0551)| 10(-) | | 16 | 12.3 (0.4842) | 51(54) | |------------------------------------| |--------------------------------------| | 03 | 2.2 (0.0866)| 13(-) | | 20 | 15.6 (0.6141) | 64(68) | |------------------------------------| |--------------------------------------| | 04 | 3 (0.1181) | 16(-) | | 24 | 19 (0.7480) | 76(80) | |------------------------------------| |--------------------------------------| | 06 | 4.6 (0.1811)| 19(22) | | 28 | 21.8 (0.8582) | 83(90) | |------------------------------------| |--------------------------------------| | 09 | 7 (0.2755) | 32(35) | | 32 | 24.5 (0.9645) | 89(100) | |------------------------------------| |--------------------------------------| | 10 | 7.6 (0.2992)| 35(38) | | 40 | 31.7 (1.2480) | 02(115) | |------------------------------------| |--------------------------------------| | 12 | 9.2 (0.3622)| 38(41) | | 48 | 38.1 (1.5000) | 127(180) | |------------------------------------| ----------------------------------------| 14 |10.8 (0.4251)| 45(48) | -------------------------------------- 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 ESPM Electrical Standard Practices Manual 2(55)
