This 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: a) Enclosures for indoor locations@ Types 1@ 2@ 5@ 12@ 12K@ and 13; and b) Enclosures for indoor or outdoor locations@ Types 3@ 3X@ 3R@ 3RX@ 3S@ 3SX@ 4@ 4X@ 6@ and 6P. This standard covers the non-environmental construction and performance requirements for enclosures to provide a degree of protection to personnel against incidental contact with the enclosed equipment. The additional environmental construction and performance requirements for enclosures are located in CSA C22.2 No. 94.2@ UL 50E@ and NMX-J-235/2-ANCE (See Annex B@ Ref. No. 15)@ which are intended to be used in conjunction with this standard. Where an individual product standard contains requirements that are at variance with those of this standard@ the requirements of the individual product standard take precedence. In the United States and Mexico@ cabinets and cutout boxes and junction and pull boxes are covered by Clauses 9 and 10 of this Standard. In Canada@ junction boxes@ cutout boxes@ and pull boxes are covered by CSA C22.2 No. 40 and are not covered by this standard. See Annex B@ Ref. No. 12. Outlet boxes having a volume of not more than 1640 cm3 (100 in3) are covered by CSA C22.2 No. 18.1@ NMX-J-023/1-ANCE@ and the UL 514 series (see Annex B@ Ref. No. 6 and 13) and are not covered by this standard. In Canada and the United States @ swimming pool type junction boxes are covered by CSA C22.2 No. 89 and UL 1241 (see Annex B@ Ref. No. 11) and are not covered by this standard.
UL 50-2015 history
2022UL 50 BULLETIN-2022 UL Standard for Safety Enclosures for Electrical Equipment, Non-Environmental Considerations
1970UL 50-2020 Enclosures for electrical equipment
2019UL 50 BULLETIN-2019 UL Standard for Safety Enclosures for Enclosures for Electrical Equipment@ Non-Environmental Considerations (COMMENTS DUE: August 26@ 2019)
2017UL 50 BULLETIN-2017 UL Standard for Safety Enclosures for Electrical Equipment@ Non-Environmental Considerations (COMMENTS DUE: December 14@ 2017)
2015UL 50-2015 UL Standard for Safety Enclosures for Electrical Equipment@ Non-Environmental Considerations (Thirteeth Edition)
2014UL 50 BULLETIN-2014 UL Standard for Safety Enclosures for Electrical Equipment@ Non-Environmental Considerations (COMMENTS DUE: DECEMBER 9@ 2014)
2013UL 50 BULLETIN-2013 UL Standard for Safety Enclosures for Electrical Equipment@ Non-Environmental Considerations
2012UL 50 BULLETIN-2012 UL Standard for Safety Enclosures for Electrical Equipment@ Non-Environmental Considerations (COMMENTS DUE: APRIL 16@ 2012)
2011UL 50 CRD-2011 UL Standard for Safety Enclosures for Electrical Equipment@ Non-Environmental Considerations - Section / Paragraph Reference: Revised 1.1@ 5.1.7@ 6.3.3.1@ 6.3.4.1@ 6.3.4.2@ 6.3.4.3@ 7.8@ 7.8.1 Subject: Addition of Types 3X@ 3SX@ and 3RX Ratings (Edition 1
2010UL 50 BULLETIN-2010 UL Standard for Safety Enclosures for Electrical Equipment@ Non-Environmental Considerations
2007UL 50-2007 Enclosures for electrical equipment, non-environmental considerations
2006UL 50 BULLETIN-2006 UL Standard for Safety Enclosures for Electrical Equipment@ Non-Environmental Considerations
2005UL 50 BULLETIN-2005 UL Standard for Safety Enclosures for Electrical Equipment@ Non-Environmental Considerations
2001UL 50 BULLETIN-2001 UL Standard for Safety Enclosures for Electrical Equipment@ Non-Environmental Considerations
1995UL 50-1995 Enclosures for electrical equipment
1992UL 50-1992 UL Standard for Safety Enclosures for Electrical Equipment@ Non-Environmental Considerations (Tenth Edition; With Revisions Through and Including November 11@ 1994)
1970UL 50-1970 UL Standard for Safety Enclosures for Electrical Equipment (Sixth Edition; Reprint with Revisions Through and Including June 21@ 1974)