ISPE Glossary of Pharmaceutical and Biotechnology Terminology

Print this page         
Find Definition by Term and/or Language
Term Language (Optional)
Browse All Terms
Beginning With By Language
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z :: All English
Deutsch
Francais

NEMA (National Electrical Manufacturers Association) Enclosures

As a way of standardizing enclosure performance, NEMA uses a rating system to identify the enclosure’s ability to resist external environmental influences. Resistance to everything from dripping liquid to hose-down to total submersion is defined by this rating system. For more detailed and complete information, NEMA Standards Publication 250-1997, “Enclosures for Electrical Equipment (1000 Volts Maximum)” should be consulted.

Enclosure Types for Non-Hazardous Locations

1. Type 1 – Enclosures constructed for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment and to provide a degree of protection against falling dirt.

2. Type 2 – Enclosures constructed for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment, to provide a degree of protection against falling dirt, and to provide a degree of protection against dripping and light splashing of liquids.

3. Type 3 – Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt, rain, sleet, snow, and windblown dust; and that will be undamaged by the external formation of ice on the enclosure.

4. Type 3R – Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt, rain, sleet, and snow; and that will be undamaged by the external formation of ice on the enclosure.

5. Type 3S – Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt, rain, sleet, snow, and windblown dust; and in which the external mechanism(s) remain operable when ice laden.

1. Type 4 – Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt, rain, sleet, snow, and windblown dust, splashing water, and hose-directed water; and that will be undamaged by the external formation of ice on the enclosure.

2. Type 4X – Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt, rain, sleet, snow, and windblown dust, splashing water, hose-directed water, and corrosion; and that will be undamaged by the external formation of ice on the enclosure.

3. Type 5 – Enclosures constructed for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against settling airborne dust, lint, fibers, and flyings; and to provide a degree of protection against dripping and light splashing of liquids.

4. Type 6 – Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against hose-directed water and the entry of water during occasional temporary submersion at a limited depth; and that will be undamaged by the external formation of ice on the enclosure.

5. Type 6P – Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against hose-directed water and the entry of water during prolonged submersion at a limited depth; and that will be undamaged by the external formation of ice on the enclosure

6. Type 12 – Enclosures constructed (without knockouts) for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against circulating dust, lint, fibers, and flyings; and against dripping and light splashing of liquids.

7. Type 12K – Enclosures constructed (with knockouts) for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against circulating dust, lint, fibers, and flyings; and against dripping and light splashing of liquids

8. Type 13 – Enclosures constructed for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against circulating dust, lint, fibers, and flyings; and against the spraying, splashing, and seepage of water, oil, and noncorrosive coolants.



Enclosure Types for Hazardous Locations

9. Type 7 – Enclosures constructed for indoor use in hazardous locations classified as Class I, Division 1, Groups A, B, C, or D as defined in NFPA 70. When completely and properly installed and maintained these types of enclosures are designed to contain an internal explosion without causing an external hazard.

1. Type 8 – Enclosures constructed for either indoor or outdoor use in hazardous locations classified as Class I, Division 1, Groups A, B, C, or D as defined in NFPA 70. When completely and properly installed and maintained these types of enclosures are designed to prevent combustion through the use of oil-immersed equipment.

1. Type 9 – Enclosures constructed for indoor use in hazardous locations classified as Class II, Division 1, Groups E, F, or G as defined in NFPA 70. When completely and properly installed and maintained these types of enclosures are designed to prevent the ignition of combustible dust.

1. Type 10 – Enclosures constructed to meet the requirements of the Mine Safety and Health Administration (MSHA), CFR Title 30 - Mineral Resources – Part 18. When completely and properly installed and maintained these types of enclosures are designed to contain an internal explosion without causing an external hazard.

See also: Electrical Area Classifications Hazardous (Classified) Locations

Do you have a term that should be included in the glossary?
Submit a term for review

My ISPE

  • Click to go to My Communities of Practice
  • Click to go to My Affiliate or Chapter
  • Click to go to My Profile
Click to go to the Member Gift