A320 ESPM Electrical Standard Practices Manual 2(75)

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R R  (2) Clamp installation on the structure - Attach this assembly on the structure in relation to the orientation and stacking rules. 
R  Install all clamps with fastener tabs upwards. Do the checks that follow : 
R R R  - Attachment holes must not be elongated. - clamps must be installed so that the electrical wires do not touch other parts of the aircraft when vibrations occur. - keep sufficient slack between the last clamp and the electrical equipment to prevent strain at the connection and to keep unwanted effects on shock-mounted equipment to a minimum.
 ____NOTE : For NSA935807 clamps : - the conduit must extend 10 mm (0.3937 in.) to 15 mm (0.5905 in.) from the last clamp.
R R  ____NOTE : When the clamps or other cable attachments are held, do not pull the bundle to try to apply the overlength equally.

 

R Clamps - Installation of Clamp on the Structure R ABS1339, NSA5515, NSA5516, NSA935807 and MS21919 Figure 003

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R Clamps - Installation of Clamp on the Structure R ABS1339, NSA5515, NSA5516, NSA935807 and MS21919 Figure 004

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 ______________________________________________RACEWAY ASSEMBLIES - DESCRIPTION AND OPERATION
R R R  _______1. General This chapter gives the description and operation for the raceway assemblies. The raceways are items used to attach, tie and protect the wiring in confined area (wing). The raceway element installed on aircraft have the following code : - ABS0127 (only for A320 family), - ABS0689 (only for A330-A340 family).
 _______2. ABS0127
 A. P/N identification ABS0127 - 01 | | | | | ----------- Part and Type code : 01 to 06 = fairlead | T = harpoon tie | A or B = retainer | ------------------ Standard P/N
 B. P/N characteristics (Ref. Fig. 001)
 (1) Operating temperature is -55 deg.C (-67.00 deg.F) to 120 deg.C (248.00 deg.F).
R R R R R  (2) Standard assembly raceways comprise : - harpoon tie (ABS0127 T), - fairlead (ABS0127 xx), - retainer (ABS0127 x), - raceway (no Standard P/N but miscellaneous drawing number possible).
 (3) Part and Type code

 

 Raceway assemblies - Details
 ABS0127
 Figure 001

 

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 ------------------------------------------------| PART AND TYPE | DESIGNATION | COLOUR | | CODE | | | |-----------------|---------------|------------| | 01 | FAIRLEAD | BLACK | |-----------------|---------------|------------| | 02 | FAIRLEAD | NATURAL | |-----------------|---------------|------------| | 03 | FAIRLEAD | NATURAL | |-----------------|---------------|------------| | 04 | FAIRLEAD | BLACK | |-----------------|---------------|------------| | 05 | FAIRLEAD | NATURAL | |---------------- |---------------|------------| | 06 | FAIRLEAD | NATURAL | |-----------------|---------------|------------| | A | RETAINER | NATURAL | |-----------------|---------------|------------| | B* | RETAINER | NATURAL | |-----------------|---------------|------------| | T | HARPOON TIE | BLACK | ------------------------------------------------
*
 Retainer B is an optional locking device for use with type 03 and 05 fairleads only.

 C.
 Installation procedure

 (1)
 Installation of harpoon-tie

 -Prior to the raceway installation insert harpoon-ties into the raceways at each end. First at each end and after, at pitches max. of 150 mm (5.9055 in.).
 -Push the harpoon-tie with your hand until the tie-head is fully locked into its related hole in the raceway.

 (2)
 Installation of raceway
 (Ref. Fig. 002)

 

 

 -Install the raceways ensuring that each raceway is not visually
 damaged and that they are aligned correctly. Make sure the raceways R do not touch the structure and that the cables cannot chafe the R raceway fins.
 -Make bonding connections. The coating must not be removed. Probe the foot of raceway only during bonding checking.
 -Over seal joints, the bolt threads must be dipped prior to assy where rear overcoating is impossible.
 -All potentially dangerous structural items must be protected prior to the installation of the harness (if necessary install cap ends at every raceway fin end).

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 Raceway assemblies - Standard installation
 ABS0127
 Figure 002

 

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 (3) Installation of cables in raceways
 (Ref. Fig. 002)
 - Make sure that the harpoons are secure in the raceway. 
R  - Install the cable harness in the applicable raceway channel. 
R  - Make sure that: 
R  .The fill factor is not exceeded (max. 65 % in trailing edge or 80 
　
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