MIL-DTL-917F(SH)
3.17.4.2 High voltage. Danger signs shall be supplemented by physical barriers or other positive protection
where feasible. Signs reading "DANGER HIGH VOLTAGE" or "DANGER (insert maximum voltage) VOLTS"
shall be displayed prominently on safety covers, access doors, and inside equipment where hazardous voltages are
exposed. Markings on electrical equipment shall be in accordance with Article 510 of the NFPA 70.
3.17.4.3 Illuminated plates. Illuminated plates shall be in accordance with MIL-DTL-7788.
3.17.5 Control setting indicators. Dials of controls shall be marked numerically or alphabetically so that an
increase in the value of the setting results in an increase in the effect controlled. Reverse relationships, if required,
shall be as specified in the individual equipment specification (see 6.2). Where verniers are employed for fine
control, the marking and numbering shall provide continuity throughout the dial range.
3.18 Identification of parts.
3.18.1 Identification of part leads. For each polarized part, such as electrolytic capacitors and rectifiers, except
for stud mounted diodes, the polarity identification shall be marked on the part mounting surface in order to ensure
proper replacement of the part. For multiple lead parts such as transistors, where proper circuit operation is
dependent on a specific lead hookup, appropriate lead identification shall be marked on the part mounting board to
ensure proper placement and replacement of the part.
3.18.2 Method of marking. Markings shall be permanent and legible. The markings on plastic or metallic
materials shall be made by stamping, engraving, stenciling, or rubber stamping with smudge-proof ink covered with
a coat of clear lacquer or silk screening. Decalcomanias or paper labels shall not be used.
3.19 Requirements for operating voltages greater than 1,000 V, but less than or equal to 15,000 V.
3.19.1 Medium and high voltage power requirements.
3.19.1.1 Medium voltage DC power systems. Unless otherwise specified (see 6.2), medium voltage DC
powered equipment shall operate satisfactorily and adhere to user equipment interface requirements in accordance
with IEEE 1709.
3.19.1.2 High voltage input power. Unless otherwise specified (see 6.2), AC powered equipment shall operate
satisfactorily and adhere to user equipment interface requirements in accordance with MIL-STD-1399-680.
3.19.2 Wire.
3.19.2.1 1,000 to 5,000-V hook-up wire. 1,000 to 5,000-V hook-up wire shall be in accordance with
MIL-DTL-24643 and IEEE 1580. Additional guidance can be found in MIL-HDBK-299. 1,000-V wiring shall be
selected from MIL-DTL-24643/14, /15, /16, /17, /18, /19, /20, /48, /49, /50, /51, /67, /68, /72, /73, and
MIL-DTL-16878/15. 3,000 to 5,000-V wire shall be selected from MIL-DTL-24643/22 and /53 and
MIL-DTL-16878/16.
3.19.2.2 5,000 to 15,000-V hook-up wire. 5,000 to 15,000-V hook-up wire shall be in accordance with
ANSI/NEMA-WC-74/ICEA S-93-639 and IEEE 1580.
3.19.2.3 Wire methods.
3.19.2.3.1 Wire practices. The recommended practices for 1,000 to 15,000-V marine cable shall be in
accordance with IEEE 1580 and ANSI/NEMA CC 1.
3.19.2.3.2 Wire connections and terminals. 1,000 to 15,000-V connections, connectors, and terminals shall be
designed, installed, and tested in accordance with ANSI/NEMA CC 1. Common types of connectors are shown in
Annex E of ANSI/NEMA CC 1.
3.19.2.3.3 Bus bars. Bus bars shall be designed and installed in accordance with ANSI/NEMA CC 1.
3.19.2.3.4 Connection marking. Connections shall be marked in accordance with ANSI/NEMA CC 1.
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