UL 50E
(Enclosures for Electrical Equipment, Environmental Considerations, Edition 1)
Are you a manufacturer looking to get Type testing on Enclosures for Electrical Equipment, Environmental Considerations?
UL 50E / CSA C22.2.94.2.
This is the standard you will need your enclosures tested to: UL 50E / CSA C22.2.94.2.

UL 50E / CSA C22.2.94.2. is the standard you will need for Enclosures for Electrical Equipment under Environmental Considerations
This tri-national standard applies to enclosures for electrical equipment intended to be installed and used in non-hazardous locations in accordance with the Canadian Electrical Code, Part I, CSA C22.1, the provisions of the National Electrical Code, NFPA 70, and the provisions of Mexico’s Electrical Installations, NOM-001-SEDE, as follows:
- Enclosures for indoor locations, Types 1, 2, 5, 12, 12K, and 13; and
- Enclosures for indoor or outdoor locations, Types 3, 3R, 3S, 4, 4X, 6, and 6P.
This standard also covers additional environmental construction and performance requirements for enclosures.
For more information on how we can help you meet these standards, visit our HazLoc Certification page. Our team is here to guide you through the testing process and ensure your products are compliant.
What is an Enclosure
A surrounding case constructed to provide:
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Protection for personnel: Against incidental contact with the enclosed equipment
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Protection for equipment: Against specified environmental conditions
Enclosures are critical for ensuring safety and durability in various applications, from industrial settings to residential installations. Choosing the right enclosure type is essential for meeting regulatory requirements and ensuring long-term performance.
Type Testing
Type Testing includes the following tests:
- Drip test
- Rain test
- Dust test
- External icing test
- Hosedown test
- Indoor corrosion protection
- Outdoor corrosion protection
- Submersion test
- Pressure test
- Oil exclusion test
- Gasket tests
- Rod entry test
- Misalignment test
- Water exposure and immersion test
These tests simulate real-world conditions to ensure your enclosures can withstand environmental challenges. When designing an enclosure, knowing the difference between each Enclosure Type definition is important. If in doubt, LabTest can help you sort that out. It’s as easy as Type 1, Type 2, Type 3!
For more details on our testing capabilities, visit our Environmental Testing page.