UL 50:2020 PDF Download

UL 50:2020 standard applies to enclosures intended for installation and use in non-hazardous locations. This standard aligns with the Canadian Electrical Code, Part I, CSA C22.1; the National Electrical Code, NFPA 70; and Mexico's Electrical Installations, NOM-001-SEDE.

The standard categorizes enclosures into different types based on their intended use. For indoor locations, it covers Types 1, 2, 5, 12, 12K, and 13 enclosures. For indoor or outdoor locations, it covers Types 3, 3X, 3R, 3RX, 3S, 3SX, 4, 4X, 6, and 6P enclosures.

The purpose of this standard is to outline the construction and performance requirements for enclosures in terms of non-environmental considerations. It ensures that enclosures provide a level of protection to personnel against incidental contact with the enclosed equipment. However, it should be noted that additional environmental construction and performance requirements are covered in other standards, such as CSA C22.2 No. 94.2, UL 50E, and NMX-J-235/2-ANCE, which are meant to be used in conjunction with UL 50.

It is important to prioritize the requirements of the individual product standard if they differ from those outlined in UL 50. The standard also includes specific provisions for cabinets, cutout boxes, junction boxes, and pull boxes in the United States, Mexico, and Canada.

To summarize, UL 50:2020 standard focuses on the construction and performance requirements for enclosures used in non-hazardous locations. It ensures the safety of personnel and provides guidelines for different types of indoor and outdoor enclosures. Environmental considerations and specific product standards take precedence when applicable.