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|  MIL-S-17000/3A(SH)
towards the front of the switchboard. The 16 taper pin blocks shall be arranged
in four rows of four blocks per row. The 16 terminal junction systems shall be
arranged in four rows of four tracks per row. The 22 terminal boards shall be
arranged as shown on sheet 2 of figure 1. The use of a single mounting bracket
for two tracks of terminal junction system modules is preferable. The harness
connector receptacles shall be located in a vertical row on the end of the
module closest to the door hinge. The front panel of these modules shall be
hinged on the bottom edge. The hinge shall permit the front panel to open to
a maximum of 130 degrees. The front panel shall be held in an upright position
by captive screw-type fasteners made of corrosion-resistant steel type 303
and with a screw thread size of 1/4-20. The horizontal edge of the module
shall be covered with insulation material to prevent chafing of ship cables.
Module taper pin, terminal junction system, and terminal board numbering:
Modules, taper pin blocks, terminal junction systems, and terminal boards
shall be numbered as shown on figure 1.
Module B through G wiring arrangement: Module B through G wiring arrange-
ment shall be in accordance with the following:
(a) Ship cables shall terminate in connector plugs in accordance
with MS3406 with 45 degree strain relief clamps in accordance
with MS3415.
(b) Only wiring for active circuits shall be installed from the
ship cable connector receptacles to the module connection
point and to the harness wiring connector receptacles.
(c) Wiring to and from the taper pin blocks shall be arranged as
shown in requirement 3 of MIL-STD-1657. Wiring to and from
the terminal junction systems shall be arranged as shown in
requirement 4 of MIL-STD-1657. Wiring from the ship cable
connector receptacles shall be connected to the front of the
terminal boards. All other module wiring shall be connected
to the back of the terminal boards.
(d) Adequate slack shall be left in the wiring to the taper pin
blocks , terminal junction system, or terminal boards from the
ship connectors and the module connectors to permit the front
panel of the module to swing down to a 130-degree opening.
(e) Whenever conductors of ship cables have to terminate in more
than one switchboard section, they shall be connected to a
terminal point in the module where the ship cables terminate.
They then shall be routed to the connector receptacles in the
top (a) module and through intersection wiring to other sections
as required.
Preparing activity:
Navy - SH
(Project 1290-N379)
U.S. GOVERNMENT PRINTING OFFICE: 1983-605-034/2569
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