Shield Termination - Method B.1 (Quick Term - Garmin GDU 37X Installation Manual

B.1.4 Shield Termination – Method B.1 (Quick Term)
If desired, the drain wire termination (item 3) and the floating shield termination (item 5) can be effectively
combined into a "Quick Term". This method eliminates the float in the cable insulation and moves the
placement of the window which was described by the dimensions "Window Min" and "Window Max"
from Method A. This technique is depicted in Figure B-5.
The original purpose for separating the shield drain termination (item 3) from the
float termination (item 5) in Method A was to allow for a variety of lengths for the
drain wires so that the shield drain terminations (item 3) would not all "bunch up"
in the harness and to eliminate loops in the drain wires. If Method B is chosen, as
described in this section, care must be taken to insure that all drain shield
terminations can still be inspected. With connectors which require a large number
of shield terminations it may be best to use Method A. This will allow the drain
shield terminations (item 3) a larger area to be dispersed across.
Using this method, the instructions from Section B.1.2 (Method A) are followed except that:
1. Step 2 is eliminated
2. Steps 3 and 4 are replaced by the following:
At the end of the shielded cable (item 2), strip "Quick Term Min" to "Quick Term Max" (Table B-4)
length of the jacket to expose the shield. Next trim the shield so that at most 0.35 inches remains
extending beyond the insulating jacket. Fold this remaining shield back over the jacket.
Connect a Flat Braid (item 4) to the folded back shield of the prepared cable assembly. The flat braid
should go out the front of the termination towards the connector. It is not permitted to exit the rear of
the termination and loop back towards the connector. (Figure B-5). Make this connection using an
approved shield termination technique.
FAA AC 43.13-1B Chapter 11, Section 8 (Wiring Installation Inspection
Requirements) may be a helpful reference for termination techniques.
Preferred Method:
Slide a solder sleeve (item 3) onto the prepared cable assembly (item 2) and connect the Flat Braid
(item 4) to the shield using a heat gun approved for use with solder sleeves. It may prove beneficial to
use a solder sleeve with a pre-installed Flat Braid versus having to cut a length of Flat Braid to be used.
The chosen size of solder sleeve must accommodate both the number of conductors present in the
cable and the Flat Braid (item 4) to be attached.
Reference Section B.1.2 for recommended solder sleeves and flat braid. The
same recommendations are applicable to this technique.
Page B-8
Revision C
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GDU 37X Installation Manual
190-01054-01