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Standard 50, Edition 13

Enclosures for Electrical Equipment, Non-Environmental Considerations

UL CSDS Proposal
Standard 50, Edition 13 Edition Date: August 30, 2013
Summary of Topics b0050_13_20130830_sum.html

Subject 50

Bulletin Dated: August 30, 2013


The following requirements are being proposed:

1. For Preliminary Review Only: Adoption of the Thirteenth Edition of the Standard for Safety For Enclosures for Electrical Equipment, Non-Environmental Considerations, which includes the following changes: (A) Addition of environmental Type ratings 3X, 3RX, and 3SX; (B) Sharp edges on electrical equipment; (C) Requirements for slot and tab fastenings; (D) Clarification of types of cast metal suitable for use as an enclosure; (E) Equipment door opening 90 degrees from the closed position; (F) Certification Requirement Decision for nonmetallic-sheathed cable clamps; (G) Revision to requirement of cover and flange overlap for cabinets used as panelboards; and (H) Revision to Annex B references

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