UL 50:2015 free download

UL 50:2015 free download Enclosures for Electrical Equipment, Non- Environmental Considerations
1 Scope
1 .1 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, 1 2, 1 2K, and 1 3; and
b) Enclosures for indoor or outdoor locations, Types 3, 3X, 3R, 3RX, 3S, 3SX, 4, 4X, 6, and 6P.
1 .2 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. 1 5), which are intended to be used in conjunction with this standard.
1 .3 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.
1 .4 In the United States and Mexico, cabinets and cutout boxes and junction and pull boxes are covered by Clauses 9 and 1 0 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. 1 2. 1 .5 Outlet boxes having a volume of not more than 1 640 cm 3 (1 00 in 3 ) are covered by CSA C22.2 No. 1 8.1 , NMX-J-023/1 -ANCE, and the UL 51 4 series (see Annex B, Ref. No. 6 and 1 3) and are not covered by this standard.
1 .6 In Canada and the United States , swimming pool type junction boxes are covered by CSA C22.2 No. 89 and UL 1 241 (see Annex B, Ref. No. 1 1 ) and are not covered by this standard.
2 Units of Measurement
2.1 The values given in SI (metric) units shall be normative. Any other values given shall be for informational purposes only.
3 Components
3.1 Except as indicated in Clause 3.2, a component of a product covered by this standard shall comply with the requirements for that component. See Annex A for a list of standards covering components generally used in the products covered by this standard. A component shall comply with the ANCE, CSA Group, or UL standards as appropriate for the country where the product is to be used.
3.2 A component is not required to comply with a specific requirement that:
a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or
b) Is superseded by a requirement in this standard.
3.3 A component shall be used in accordance with its rating established for the intended conditions of use.