MIL-DTL-29183C
3.12.1 Low temperature. The distribution panels shall operate satisfactorily in an ambient
temperature of -25 °F (-32 °C) as tested in accordance with 4.5.4.1. Certification is acceptable.
3.12.2 High temperature. The distribution panel shall operate satisfactorily in an ambient
temperature of 125 °F (51.7 °C) as tested in accordance with 4.5.4.2.
3.12.3 Rain. The distribution panels shall operate satisfactorily in windblown rain of 2 to
5 inches per hour as tested in accordance with 4.5.4.3.
3.12.4 Salt fog. The distribution panels shall be capable of being stored and operated in a
salt fog atmosphere without effect in performance as tested in accordance with 4.5.4.4.
Certification is acceptable.
3.12.5 Sand and dust. The distribution panels shall operate satisfactorily in a sandy and
dusty environment as tested in accordance with 4.5.4.5. Certification is acceptable.
3.12.6 Shock. The distribution panels shall operate satisfactorily after being subjected to
impact shocks, such as handling and transportation shocks, as tested in accordance with 4.5.4.6.
3.12.7 Humidity. The distribution panels shall operate satisfactorily in a humid
atmosphere of 95 ± 5 percent relative humidity as tested in accordance with 4.5.4.7. Certification
is acceptable.
3.13 Instruction and warning markings. All marking on plates and labels shall be
permanent. Markings shall be etched, inscribed, or stamped.
3.13.1 Instruction plates. The distribution panel shall be equipped with instruction plates
suitably located that describe any special or important procedures to be followed in operating and
servicing the equipment. Plates shall be of a material that will last and remain legible for the life
of the equipment, and shall be securely affixed thereto with nonferrous screws or bolts or rivets of
not less than 1/8-inch diameter. A plate marked "ground" shall be installed at the grounding
terminal (see 3.8.8) on the exterior of all distribution panels.
3.13.2 Warning labels. All access panels (see 3.8.5.2) and the circuit breaker panel shall
have a permanently legible warning label permanently affixed to the outside of the access panel,
indicating the danger of exposed energized electrical connections on the inside of the distribution
panel. Warning labels shall be made of corrosion resistant aluminum or brass and shall be affixed
to the access panel by nonferrous metal screws or rivets.
3.14 Identification plate. A nameplate of corrosion resistant metal shall be installed on
the face of the circuit breaker panelboard with nonferrous metal screws, rivets, or bolts of not less
than 1/8-inch diameter. The nameplate shall be permanently and legibly marked by inscribing or
stamping manufacturer's model number and serial number, power handling capacity in kilowatts,
voltage, phase, frequency and current rating of input, dimensions, weight, date of manufacture,
contract number, national stock number, and military specification number.
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