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943-227-15 Digital Preamplifier
Operator Manual
D-2
Detector Field Cable Preparation, 943-227-15VL-M1, Conduit Hub:
Prior to terminating the cable, the field conduit must be run to the junction box, and the field cable pulled
into the junction box.
To prepare the cable for termination, a minimum of 7 inches of the cable outer jacket must be stripped off
the cable. This will allow for the stripping of approximately one inch from the various conductors, and
provide 6 inches of actual service loop cable. In addition, for EMI/RFI protection, the drain wire must be
terminated to an earth ground within the enclosure. The length of the drain wire will be based on the
distance between the UDR rear panel and the ground location. The length of cable jacket to be stripped
will then be based on the distance to the drain wire grounding point.
Once the cable outer jacket is stripped to the proper length, the aluminum tape shield and Mylar binder
may be removed, taking care not to damage the No. 20 AWG drain wire. The drain wire may then be
separated from the remaining conductors, for routing and termination at the grounding point.
Next, the HV coaxial cable may be separated from the bundle, followed by the single conductors wires
that are required for the specific application, and the polyester filler cord. Refer to the project specific
detector loop drawing, or the generic detector loop drawing provided in Appendix B for actual conductors
to be used. The ring lug connectors may now be applied to the single conductor cables, and installed in
accordance with the project electrical loop diagram.
Trim each conductor as required to reach its assigned terminal point. Allow a minimum of 1 in. spare
conductor for future re-termination. Because of the unique requirements of each installation, terminal
lugs for the detector single conductor terminations are not included, and are supplied by the user. Ring
terminal, Crimp type lugs, Burndy YAE type, sized for the 18 AWG wire, or equivalent, are recommended.
The terminal block is designed to accept a maximum 14 AWG conductor, and is provided with 6-32
mounting screws. Strip the conductor as required by the lug manufacturer, install the lug, and terminate
the conductor to the appropriate terminal. The screw terminals may now be torqued to 12 in-lbs.
The mating HV connector, P/N 30-92-1 (Kings 1705-14), may now be terminated per the applicable Kings
data sheet attached.
The polyester filler cord may now be removed. Cut the cord as close to the outer jacket as possible