SUN - UL 50 harmonized with CSA C22.2 No.94.1-07

Effective September 4, 2015

Standard Information
Standard Number:
UL 50 harmonized with CSA C22.2 No.94.1-07
Standard Name:
Standard for Safety for Enclosures for Electrical Equipment, Non-Environmental Considerations
Standard Edition and Issue Date:
UL 50, 12th edition, Issued: September 4, 2007; CSA 94.1, 1st edition, Issued: September 4, 2007
Date of Previous Revisions to Standard:
11th edition, issued: October 19, 1995, revised: Sept. 12, 2003
 
Effective Date of New/Revised Requirements

Effective Date (see Schedule below): September 4, 2015

 
Impact, Overview, Fees and Action Required

Impact Statement: A review of all Listing Reports is necessary to determine which products comply with the new/revised requirements and which products will require re-evaluation and test. NOTE: Effective immediately, this revised standard will be exclusively used for evaluation of new products unless the Applicant requests in writing that current requirements be used along with their understanding that their listings will be withdrawn on the Effective Date of September 4, 2015 unless product is found to comply with the new/revised requirements.

Fees: So that production of your products bearing the Listing Mark will not be interrupted, at some point between 5 –10 months before the Effective Date, our Engineers will begin reviewing your Listing Report (s) for compliance with these new/revised requirements. Either the Listing Report (s) will be revised to show compliance or a Findings Letter will be prepared and sent to your attention along with a quote for necessary re-evaluation and testing. This initial review of your Listing Report (s) will be covered by a direct billing project:

Construction review: 1 day
Testing: 1-2 days

Overview: This revision for Safety for Enclosures for Electrical Equipment, Non-Environmental Considerations, UL 50 harmonized with CSA C22.2 No.94.1-07. 

This revision to ANSI/UL 50 is being issued to update the UL approval date per a ULStandards reaffirmation of ANSI/UL 50, CSA C22.2 No. 94.1-07 and to extend the effective date of Clauses 6.3.3.1, 6.10.2.1, 6.10.3.1, 7.8.1, 8.4.1 – 8.4.4, 8.9.1 – 8.9.2.1 and 10.1.3.

Specific details of the new/revised clauses of the standard are found in the table below.

Action Required:

Information – Please submit the following information to assist with determining compliance:
-Installation manual
-Differences and similarities if more than one model to select worse case model representation
-Markings

Samples – Please submit the following representative sample of product constructions to assist with determining compliance:

Two samples of worse case model representation of complete enclosures or sample plates that fulfill requirements of Figure 9 of standard.

Current Listings – Please immediately identify any current Listing Reports or products that are no longer active and should be removed from our records.

 
Description of New/Revised Technical Requirements
ClauseVerdictCommentNC#
6.3.3.1VerifyType 1, 2, and 3R enclosures may be ventilated 
6.10.2.1TestKnockouts shall be so formed that they are capable of being readily removed but will not drop out during ordinary handling. Multiple ring knockouts shall have sufficient strength to meet the test requirements of 8.4 
6.10.3.1TestKnockouts shall be so formed that they are capable of being readily removed but will not drop out during ordinary handling. Multiple ring knockouts shall have sufficient strength to meet the test requirements of 8.4 
7.8.1VerifyVentilated Type 1, 2, or 3R enclosures in which the equipment to be installed is not known, and in which compliance with 8.9 depends upon the location of such equipment, shall be marked to indicate the area in which live parts are to be installed. 
8.4.1-8.4.4TestMultiple knockouts test 
8.9.1-8.9.2.1TestRod Entry Test – Ventilated enclosures test method 
10.1.3VerifyA junction or pull box shall not include ventilation openings 

CUSTOMERS PLEASE NOTE: This Table and column “Verdict” can be used by you to assist in determining how current or future production of the product is or will be in compliance with the new/revised requirements by the Effective Date.