MIL-DTL-16036M(SH)
3.20.14 Bus bars. Bus bars facing and closest to the rear of the unit shall be stenciled "DANGER _____
VOLTS". Applicable voltage shall be entered. Letters shall be white and not less than 3/4 inch high. As an
alternative to stenciling, bus bars may be provided with a warning plate bearing the same legend. Letters shall be
not less than 3/4 inch high. Plate shall be pressure sensitive adhesive backed elastomeric film with a carrier or
separator sheet applied over the adhesive. Film shall consist of a white printed opaque polyvinyl fluoride film 0.002
inch thick laminated to a 0.001-inch clear polyethylene terephthalate film. Plate adhesive shall consist of an acrylic
base vinyl polymer of a pressure sensitive type. A minimum of two warning stencils or plates per unit shall be
provided, one in the upper and one in the lower section.
3.21 Tools. Where the construction of the switchboards or any of the devices installed thereon requires the use
of certain special tools for their proper service maintenance, the quantity required shall be as specified (see 6.2).
Special tools are defined as those tools not listed in the Federal Supply Catalog [copies of this catalog may be
consulted in the office of the Defense Contract Administration Service Management Area (DCASMA)]. Storage for
any tool furnished shall be provided and labeled on the switchboard enclosure.
3.22 Government furnished material. The Government will furnish material as specified (see 6.2).
3.23 Maintainability. The switchgear shall facilitate trouble-shooting, fault isolation, and repair down to the
lowest nonrepairable part or nonrepairable assembly (see 4.4.3.2).
3.24 Electromagnetic interference (EMI). The complete switchboard with electronic devices (if applicable)
shall meet and demonstrate compliance with the applicable emissions and susceptibility requirements and limits of
MIL-STD-461 for surface ship, below deck, metallic hull installations.
3.24.1 EMI test procedures. EMI test procedures and results shall be in accordance with MIL-STD-461. Test
procedures shall be approved by the NAVSEA EMI TWH or TWH representative prior to the start of testing. Final
approval/disapproval of test results shall be approved by the NAVSEA EMI TWH or TWH representative.
3.25 Dielectric strength. Switchgear shall be constructed to withstand for a period of 1 minute a dielectric test
voltage of twice the rated voltage of the equipment plus 1,000 volts RMS between separate circuits and to ground.
3.26 Ambient temperature. The switchgear shall meet all the specification requirements when operating in an
ambient temperature of 122 °F (50 °C) and have no more than a 45 °F (25 °C) temperature rise for surface ships and
for submarines (see 4.4.3.6.3).
3.27 Drawings. When specified (see 6.2), drawings shall be prepared.
3.28 Workmanship.
3.28.1 General. Workmanship shall be in accordance with the requirements herein applicable to soldering,
marking of parts and assemblies, wiring, welding and brazing, plating, riveting, finishes, machine operations, screw
assemblies, and freedom of parts from burrs, sharp edges, or any other damage or defect that could make the part (or
equipment) unsatisfactory for the purpose intended.
3.28.2 Threaded parts or devices. Screws, nuts, and bolts shall show no evidence of cross threading, mutilation,
or detrimental or hazardous burrs.
3.28.2.1 Tightness. Screw-type fasteners shall be tight. The word tight means the screw shall be firmly secured
and that there shall be no relative movement possible between the attached parts.
3.28.3 Wiring. Insulated wire shall be formed into cables or ducted wherever practicable. Wires and cables
shall be positioned or protected to avoid contact with rough or irregular surfaces and sharp edges.
3.29 Arc fault detectors. When required (see 6.2), arc fault detectors (AFD) that have been previously
approved for Navy use shall be installed in accordance with the arc fault detector vendor s instructions. The AFD
System components installed in the switchboards can include sensor interface modules, photo sensors, ionization
detectors, and pressure sensors.
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