20-33-43 Page 10
Apr 01/04
R
Raceway assemblies - Standard installation
ABS0689
Figure 004
20-33-43 Page 11
Apr 01/04
R
Take care not to damage the surface protection.
Make sure that no foreign objects remain in the raceway (e.g. cut
off residues of protruding pressure pads).
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_____________________________________TIE-WRAPS - DESCRIPTION AND OPERATION
_______1. General
R R R R R R R This chapter gives the description and operation for tie-wraps. The tie-wraps (or cable ties) are used to attach, tie and bind the wiring. Tie-wraps must ensure: - the shape of the bundle, - the distribution of the mechanical loads over all cables. The tie-wraps installed on aircraft have the codes that follow : - NSA935401, - NSA8420.
R R R R The selection of the type of tie-wraps is related to : - the type of route of the bundle. - the position over the bundle Example : In harnesses that include several bundles, each one must be attached with lacing tape NSA8420, it is not permitted to use enclosed cable ties NSA935401. - the temperature of the installation area.
R R R ____NOTE : For separation rules, refer to chapter 20-33-2X. For distances between the tying points on the harnesses, procedures to tie branches and swelling of harnesses, refer to chapter 20-33-1x.
_________2. NSA935401 (Ref. Fig. 001)
R _______CAUTION : DO NOT USE CABLE TIES WITH METAL TABS.
R Cable tie NSA935401 can be used when it is better, but only if : - the temperature is less than 130 deg.C (266.00 deg.F) - the heads of cable ties do not cause damage to the cables of adjacent bundles.
A. P/N identification
R Tie-wraps - Description and Installation NSA935401 Figure 001
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NSA935401 - 03 M X
----------- --
| | | |
| | | |
| | | --------- Color code (ref para 2.B.(3))
| | -------------- Tab material code : no code = nylon tab R | | M = metallic tab*
| |
| ----------------- Dimension code (ref para 2.B.(2))
|
------------------------- Standard P/N
R
B. P/N characteristics
(1)
Temperature Maximum operating temperature is +135 deg.C (+275.00 deg.F) Minimum operating temperature is -55 deg.C (-67.00 deg.F)
(2)
Dimension The dimensions of the tie-wrap are related to the wire bundle diameter to be attached.
20-33-44 Page 3
-----------------------------------------------------------------------------| DIMENSION | WIDTH | LENGTH | BUNDLE DIAMETER | | CODE | mm (IN) | mm (IN) | mm (IN) | |-----------|---------------------|---------------------|-------------------| | 03 | 2.5 mm (0.0984 in.) | 100 mm (3.9370 in.) | 15 mm (0.5905 in.)| |-----------|---------------------|---------------------|-------------------| | 04 | 3.5 mm (0.1377 in.) | 150 mm (5.9055 in.) | 30 mm (1.1811 in.)| |-----------|---------------------|---------------------|-------------------| | 05 | 4.7 mm (0.1850 in.) | 204 mm (8.0315 in.) | 45 mm (1.7716 in.)| |-----------|---------------------|---------------------|-------------------| | 06 | 4.7 mm (0.1850 in.) | 302 mm (11.8897 in.)| 75 mm (2.9527 in.)| |-----------|---------------------|---------------------|-------------------| | 08 | 4.7 mm (0.1850 in.) | 389 mm (15.3149 in.)|100 mm (3.9370 in.)| |-----------|---------------------|---------------------|-------------------| | | | |4.8 mm (0.1889 in.)| | 10* | 7.6 mm (0.2992 in.) | 376 mm (14.8031 in.)| to | | | | |90 mm (3.5433 in.) | |-----------|---------------------|---------------------|-------------------| | | | |4.8 mm (0.1889 in.)| | 12 | 8 mm (0.3149 in.) | 780 mm (30.7086 in.)| to | | | | |230 mm (9.0551 in.)| |-----------|---------------------|---------------------|-------------------| | 13 | 3.6 mm (0.1417 in.) | 295 mm (11.6141 in.)| 75 mm (2.9527 in.)| -----------------------------------------------------------------------------
* This dimension code is used to attach small diameter bundles by a double-turn (eight-shaped) method.
(3) Color code R These cable ties have different colors but on final aircraft wiring, R only black, sea green or natural cable ties must remain.
R ____
NOTE : Red cable ties are recommended for use in fuel tanks because R they are easier to see.
-----------------------------------------------------------------------| COLOR | BLACK or | RED | BLUE | GREEN | YELLOW | GREY | | | NATURAL | | | | | | |---------|------------|---------|--------|---------|--------|--------| | COLOR | No | R | B | G | Y | S | | CODE | Code | | | | | | -----------------------------------------------------------------------
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本文鏈接地址：A320 ESPM Electrical Standard Practices Manual 2(78)
