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MIL-DTL-2036 Enclosures For Electric And Electronic Equipment, Naval ShipboardThis specification covers requirements for enclosures that house electric and electronic equipment for Naval shipboard use. Details concerning construction, ventilation, cooling, and mechanical protection are included in this specification. This specification also covers that class of explosion proof equipment which will contain any spark or ignition within the enclosure and not permit ignition in the surrounding external atmosphere as a result of normal operation or failure of electrical circuits within the enclosure. This specification is not intended to cover enclosures which form an integral part of equipment such as batteries.

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MIL-DTL-2036E
TABLE III. Enclosures intended use.
Degree of enclosure (nomenclature)
Environment
Notes
Nonrotating equipment
Rotating equipment
Harmless to
Open
Open
equipment
Open, protected
Open, protected
1/
Dripproof (15 degrees)
Dripproof (15 degrees)
Dripproof (15 degrees)
Dripproof (15 degrees)
1/, 2/
protected
protected
Dripproof (45 degrees)
Dripproof (45 degrees)
Dripproof (45 degrees)
Dripproof (45 degrees)
1/, 2/
protected
protected
Dirty: dust and
Totally enclosed
Totally enclosed
moderate amounts
Totally enclosed
1/, 3/ ,4
of steam and vapors
(fan-cooled)
Totally enclosed
(water-air-cooled)
Weather exposure
Watertight 1/
Spraytight 1/
1/ where
(above main deck)
Spraytight (fan-cooled 1/)
indicated
4/
Spray, occasional
Watertight 1/
splashing or hosing
Sprinkler system
Splashproof
protected areas
Splashproof ,
with drains
protected1/
Transient
Watertight
Watertight
1/, 5/
submergence or
severe splashing
Submergence
Submersible (feet)
Submersible (feet)
1/, 6/
Open submersible (feet)
Open submersible (feet)
6/
Potentially
Explosionproof
Explosionproof
explosive
Explosionproof
Explosionproof (fan-cooled)
1/, 4/
atmosphere
(group D)
Special conditions
Airtight
not normally
Dust-ignition proof
Dust-ignition proof
1/
found in
Dustproof
Dustproof
shipboard
Dusttight
Dusttight
environment
Hermetic
NOTES:
1/ Enclosure provides protection of personnel against physical contact with electrically energized or
moving parts.
2/ Normally used for equipment located in machinery spaces aboard ship, except where more severe
conditions prevail.
3/ Common enclosure for pump motor applications aboard ship, except where submergence or
explosionproofness is required. Motor specifications require a shaft slinger for pump applications.
4/ Fan-cooled rotating equipment not suitable in weather exposed locations because icing conditions
could cause failure or malfunction.
5/ Suitable for equipment on ship's decks which may be awash in heavy seas.
6/ Select submergence depth (15, 50 or 1600 feet) as applicable. (4.6, 15.2 or 487.7 meters)
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