Integrated Rectifier Technologies Inc.

Rectifiers | Control Panels

  • Home
  • Company
    • Contact IRT
  • Products
    • Rectifiers
      • Rectifier Coding
      • Rectifier Standard DC Output Ratings
    • Junction Boxes
      • Junction Box Coding
    • Sacrificial Anode Test Station
    • Replacement Parts
    • Limited Warranty
    • Quality
  • Technical Info
    • Rectifier AC Input Current Calculator (MS Excel Download)
    • Rectifier Safety
    • Rectifier Request Guidelines and Product Model Limitations
    • Installation Guidelines for Potential Controlled Rectifiers
    • Enclosure Material Considerations and Rating Definitions
      • National Electrical Manufacturers Association (NEMA) Enclosure Rating Definitions
      • Underwriters Laboratories Inc. (UL) Enclosure Rating Definitions
      • Canadian Standards Association (CSA) Enclosure Rating Definitions
  • Services
    • Product Design
    • Product Support
    • Product Repair
    • Product Training
    • Third-Party Equipment Installation
You are here: Home / Technical Info / Enclosure Material Considerations and Rating Definitions / National Electrical Manufacturers Association (NEMA) Enclosure Rating Definitions

National Electrical Manufacturers Association (NEMA) Enclosure Rating Definitions

Print Friendly, PDF & Email

Type 1

Indoor use to provide a degree of protection against contact with the enclosed equipment; in locations where unusual service conditions do not exist.

Type 2

Indoor use to provide a degree of protection against contact with the enclosed equipment and against limited amounts of falling water and dirt.

Type 3

Indoor or outdoor use to provide a degree of protection against windblown dust, rain and sleet; undamaged by the formation of ice on the enclosure (not sleet proof).

Type 3R

Indoor or outdoor use to provide a degree of protection against falling rain and sleet; undamaged by the formation of ice on the enclosure.

Type 3S

Indoor or outdoor use to provide a degree of protection against windblown dust, rain and sleet; provides for operation of external mechanisms when ice laden.

Type 4

Indoor or outdoor use to protect the enclosed equipment against splashing water, seepage of water, falling or hose-directed water, and severe external condensation; these enclosures are sleet resistant but not sleet proof.

Type 4X

Indoor or outdoor use to provide a degree of protection against corrosion, windblown dust and rain, splashing water, and hose-directed water; undamaged by the formation of ice on the enclosure.

Type 5

Indoor use to provide a degree of protection against dust, falling dirt, and dripping non-corrosive liquids.

Type 6

Indoor or outdoor use to provide a degree of protection against the entry of water during occasional temporary submersion at a limited depth.

Type 6P

Indoor or outdoor use to provide a degree of protection against the entry of water during prolonged submersion at a limited depth.

Type 7

For use in indoor locations classified as Class I, Groups A, B, C and D, as defined in the National Electrical Code.

Type 8

For use in indoor or outdoor locations classified as Class I, Groups A, B, C and D, as defined in the National Electrical Code – oil immersed.

Type 9

For use in indoor locations classified as Class II, Groups E, F and G, as defined in the National Electrical Code.

Type 10

Mining enforcement safety administration approved.

Type 11

Indoor use to provide, by oil immersion, a degree of protection to enclosed equipment against corrosive effects of liquids and gases.

Type 12

Indoor use to provide a degree of protection against dust, falling dirt and dripping non-corrosive liquids No knockouts.

Type 12K

Indoor enclosure with knockouts to provide a degree of protection against dust, falling dirt and dripping
non-corrosive liquids other than at knockouts.

Type 13

Indoor use to provide a degree of protection against lint, dust, seepage, external condensation and spraying of water, oil and noncorrosive coolant.

Search

Authorized Resellers

Industry Links

Accreditations

COR

Contact Information

Canada Office
15360 116 Avenue
Edmonton, Alberta, T5M 3Z6

(P) 780.447.1114
(F) 780.454.0004

Send a Message

Copyright © 2023 Integrated Rectifier Technologies Inc.