MIL-DTL-23928G
3.3.14.1 Manufacturer's identification plate. The manufacturer's identification plate shall be metallic only, and shall
contain, as a minimum, the following information.
a.
Panel type (see 1.2).
b.
Manufacturer's name or trademark.
c.
Contract number.
d.
Specification number and classification.
e.
National stock number, if assigned.
f.
Date code.
3.3.14.2 Information plates. Information plats for transfer switches and their associated lights shall read NORMAL
or NORM, ALTERNATE or ALT, or EMERGENCY or EMER.
3.3.15 Selection of parts and materials. All materials and parts for each panel shall be as specified herein.
However, when a definite material or part is not specified, a material or part shall be used which will enable the
panels to meet the requirements of this specification. Acceptance or approval of any constituent material or part shall
not be construed as a guaranty of the acceptance of the finished product.
3.3.15.1 Standard parts. Military standard parts shall be used except as noted in 3.3.15.2 and 3.3.15.3 and shall
be identified by their military Part or Identifying Numbers (PIN's). Any standard part, of the same PIN, shall be readily
interchangeable as applied within the panel.
3.3.15.2 Nonstandard parts. Except as specified in 3.3.15.3, the use of nonstandard parts shall be reviewed by
the contracting activity.
3.3.15.3 Commercial (hardware) parts. Commercial utility hardware items such as screws, bolts, and nuts may be
used, provided they possess properties equivalent to and replaceable by MS or AN PIN's referenced in the parts list
and on the contractor's drawings.
3.4 Construction. Panels shall be constructed in accordance with this specification and the applicable contractor's
drawings.
3.4.1 Enclosures. Unless otherwise specified (see 6.2), enclosures shall be aluminum. The degree of enclosure
3.4.1.1 Access door. Unless otherwise specified (see 6.2), each enclosure shall contain a door hinged on the right
side facing the panel. The door shall be fastened by latches, captive thumb screws, or other fasteners with all parts
captive to provide quick and easy access to the interior of the panel. Doors shall be electrically grounded to the panel
framework in both the open and closed positions.
3.4.1.2 Shields. Enclosures shall be furnished with a shield to provide a completely dead front assembly. Shield
cutouts for the circuit breaker handles and escutcheons shall be in accordance with MIL-C-17588 or
MIL-DTL-17361, as applicable. Unused openings shall be effectively closed to afford protection equivalent to that of
the used openings.
3.4.1.3 Drainage. Submersible and watertight enclosures shall be provided with a moisture drain opening at the
bottom or as near the bottom as practicable. A .250 inch (6.35 mm), or larger, pipe plug shall be used to close the
opening. Where panel orientation is other than as shown on the specification sheets, ordering data for special panels
shall identify the panel top and bottom (see 6.2).
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