MIL-DTL-917F(SH)
3.12.2.8 Wire connections and terminals. The ends of each conductor (except for conductors requiring solder
connections to a terminal or stud) shall be connected to terminals on the part or to terminal boards by means of
solderless lug terminals in accordance with MIL-T-16366 or SAE-AS7928, Type II, or by forming the conductor
around a part terminal and retaining the loop in a cup or crimped washer. If a wire loop is used, strands of the
conductor shall be secured together by soldering. No more than three connections shall be made to each terminal
screw or stud. Terminal boards provided with two terminal screws per electrical terminal should be limited to two
connections per screw. Terminal jumpers (see 3.12.2.10) are not included in this limitation. Neither pins nor
conductors may be paralleled for the purpose of increasing capacity except where capacity above 220 amperes is
required or where specifically allowed by the individual equipment specification. Nuts, bolts, studs, and screws
used for electrical connections shall be secured by lockwashers, except lockwashers need not be provided for
solderless lug type connectors for 14 AWG (4000 circular mils) conductors and smaller or on terminal board or wire
terminal combinations in accordance with A-A-59125. External-tooth flat lockwashers are recommended for
electrical connections, where practical.
3.12.2.8.1 Spare terminals. Terminal boards or cable connectors used for external cable connections shall be in
accordance with SAE-AS50151. Terminal boards or cable connectors shall have not less than 10 percent unused
terminals when used for connections in the equipment and when used for the connection of assemblies with
cubicles. There shall be not less than two such terminals, except that no spares are required where a total of six or
less active terminals are involved. Spare terminals in connectors shall be in the outermost row of terminals. To
avoid selecting larger shell size connectors in order to maintain creepage and clearance distances between isolated
signal groups within a single connector, the requirement of placing the spare terminals in the outermost rows is not
applicable. Spares are required, but may be placed in locations closest to each isolated signal group. Spare
terminals shall be labeled accordingly. Where connectors or terminal boards are used only for primary power
connections, no spare terminals need be provided. If more than one terminal board or connector is needed at a
common place, only 10 percent of the total number of terminals at this place are required as spare terminals.
3.12.2.8.2 Soldered connections. Soldered wiring connections shall be as specified in 3.14.3 through 3.14.3.2.
3.12.2.8.3 Electrical weld connections. Guidance for welded wiring connections can be found in
MIL-HDBK-454.
3.12.2.9 Permanent internal connections of windings. Where permanent type connections are made within
windings, either soldering (see 3.14.3.1) or solderless pressure connectors may be used.
3.12.2.10 Terminal jumpers. Where required and possible, jumpers between adjacent terminals on terminal
boards shall be made with shaped metal conducting straps designated for that purpose.
3.12.3 Wire identification. Wires grouped in harnesses or single wires more than 12 inches in length (unless
they are unique in color or size and can be traced visually from one end to the other) shall be marked for
identification. Marking may be accomplished by stamping the identification symbol on the wire insulation, if the
insulation is a type suitable for this purpose, by sleeve type wire marker over the wire insulation, by identification
coding systems in accordance with MIL-STD-681, or by stamping the wire terminal lug if the wire size exceeds
23,000 circular mils. Marking shall be applied in a permanent manner, resistant to water, oil, and abrasion.
3.12.3.1 Marking of hook-up and lead wire. Wiring in the equipment shall be, insofar as practicable, distinctly
coded in color or numbered. Codes, when used, shall be in accordance with MIL-STD-681 or as otherwise agreed
upon with the contracting activity. Numbers shall not be used where they would be difficult to read or trace, such as
in compact assemblies. Wires shorter than 4 inches need not be physically marked, but the coding shall appear on
all diagrams showing the wires. Light colored wires shall be marked by hot stamping with black characters and
black or dark colored wires shall be hot stamped with white characters. Wires may be marked by printing the
coding on white wire markers as specified in 3.12.3.2. The printing shall remain intact and easily readable after the
wires are flexed.
3.12.3.2 Wire markers. Wire markers shall be of the tubular sleeve, coiled sleeve, or heat-shrinkable sleeve
types made of polyethylene or other insulating material which is compatible with the wire insulation. Adhesive
strip type markers may be used provided they are protected by snug fitted transparent heat-shrinkable sleeves.
Heat-shrinkable sleeves and their application shall be in accordance with SAE-AMS-DTL-23053.
45
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business