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MIL-R-23016(Wep)
used unless all other practicable means are found insuf-
ficient to meet the requirements, or unless a significant
reduction in overall size or weight can be realized. The
use of thermal characteristics of finishes or induced
draft and ventilation by means of baffles, internal vents, and
louvers, etc, shall be investigated to the greatest extent
practicable.  Exhaust and recirculating fans, blowers and
pumps shall be driven by brushless motors operating from the
applicable a-c power supply.  If a larger quantity of heat
is required to be dissipated, which might involve the use
of heat exchangers, liquid, air blast, or evaporative coolants,
the particular design shall be negotiated with the procuring
activity.  Supplementary cooling means or devices may be
employed for the equipment when operated for prolonged test or
checkout purposes, which periods are not consistent with
normal operating requirements.
3.2.6
Corona prevention:
The design of all pertinent puts of the equipment shall be
such that when operating under any service conditions specified
herein corona discharge effects shall be negligible. Particu-
lar attention to corona is required in unpressurized application
involving peak voltage of the order of 1,000 volts and higher.
(See 3.1.30.1)
3.2.7
Explosion-Proofing:
The equipment shall be made explosion-proof. Equipment or
units thereof which do not cause ignition of an ambient
explosive gaseous mixture with air, when thoroughly operated
in such an atmosphere after having been in such an atmosphere
for a period long enough to be permeated by such atmosphere,
shall be considered explosion-proof.  In general, this con-
dition will be satisfied when components such as relays,
switches, and motors with commutators, which in normal oper-
ation produce, or are likely to produce, sparking or arcing,
and which are not contained within pressurized containers,
are made explosion-proof.
3.2.8
Fungus treatment:
Equipments shall be fungus-proofed by selection of parts and
materials that are nonnutrient for fungus, or the parts and
materials shall be so treated prior to their use in the equip-
ment that overall spraying of the equipment is not necessary.
50

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