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Main
Office
10940 Beaver Dam Rd
Hunt Valley, MD 21030
Ph: 410-666-3200
Fx: 410-666-3631
Central VA
Office
10993 Richardson Rd #13
Ashland, VA 23005
Ph: 804-752-3450
Fx: 804-752-3451
Tidewater
Office
4402 Edwin Rd
Portsmouth, VA 23703
Ph: 757-686-1777
Fx: 757-686-9333
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Electrical
Equipment
Enclosure Ratings
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| NEMA
Classifications and Ingress Protection (IP) Codes |
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Class (IP code) |
Title |
Description |
| 1
(10) |
General
Purpose |
Unventilated/Ventilated
for indoor use limited amounts of falling dirt |
| 2
(11) |
Drip
Tight |
Unventilated/Ventilated
for indoor use with limited amounts of falling dirt
and water. |
| 3
(54) |
Weather
Resistant |
Unventilated
for outdoor use with rain, sleet, windblown dust, and
external ice damage.
3R - Unventilated/Ventilated for outdoor use with all
of the above except windblown dust.
3S - Unventilated for outdoor use with all of the
above and will ensure external mechanisms will
function when ice laden. |
| 4
(56) |
Water
Tight (Weatherproof) |
Unventilated
for indoor/outdoor use with windblown dust and rain,
splashing and hose-directed water, and external ice
damage.
4X - Unventilated for indoor/outdoor use with all of
the above including corrosion. |
| 5
(52) |
Dust
Tight |
Unventilated
for indoor use with settling dust, falling dirt, and
dripping non-corrosive liquids. |
| 6
(67) |
Submersible |
Unventilated
for indoor/outdoor use with hose-directed water, entry
of water from submersion. |
| 7 |
Hazardous |
Unventilated
for indoor use in NEC defined Class I, Groups A, B, C,
or D. |
| 8 |
Hazardous |
Unventilated
for indoor/outdoor use in NEC defined Class I, Groups
A, B, C, or D. |
| 9 |
Hazardous |
Unventilated
for indoor use in NEC defined Class II, Groups E, F,
or G. |
| 10 |
Mines |
Unventilated
to meet the applicable requirements of the Mine Safety
and Health Administration. |
| 12
(52) |
Industrial
Use |
Unventilated
for indoor use with circulating dust, falling dirt,
and dripping non-corrosive liquids.
12K - Unventilated for indoor use with knockouts for
above conditions. |
| 13
(54) |
Oil
Tight |
Unventilated
for indoor use with dust, spraying water, oil, and
non-corrosive coolant. |
| Code |
First
Number
(Protection against solid bodies) |
Second
Number
(Protection against liquid) |
| 0 |
No
protection |
No
protection |
| 1 |
Objects
greater than 50mm |
Vertically
dripping water |
| 2 |
Objects
greater than 12mm |
75°
to 90° dripping water |
| 3 |
Objects
greater than 2.5mm |
Sprayed
water |
| 4 |
Objects
greater than 1mm |
Splashed
water |
| 5 |
Dust
protected |
Water
jets |
| 6 |
Dust
tight |
Heavy
seas |
| 7 |
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Effects
of immersion |
| 8 |
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Indefinite
immersion |
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