Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.
Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards.
Validating the specifications, value and safety of your raw materials, products and assets.
Effective December 23, 2019
ADDENDUM SUN: This ADDENDUM establishes the Continuing Certification approach to Enclosures for Electrical Equipment, and Extends the Effective Date to December 23, 2019. This ADDENDUM replaces SUN issued November 2, 2015.
Effective Date (see Schedule below): December 23, 2019
Overview of Changes:
The second edition of UL 50E was issued to include the following requirements:
Current Listings Not Active? – Please immediately identify any current Listing Reports or products that are no longer active and should be removed from our records. We will do this at no charge as long as Intertek is notified in writing prior to the review of your reports.
The second edition of UL 50E includes the addition of environmental Type ratings 3X, 3RX, and 3SX.
|8.1.3||New clause added;|
Screws and screw type fasteners for doors or covers on enclosures not marked per Clause 9.8 shall be tightened to the following values:
a) A No. 6 screw capable of being tightened with a screwdriver shall be tightened to a torque of 1.36 N•m (12 lbf-in);
b) A No. 8 screw capable of being tightened with a screwdriver shall be tightened to a torque of 2.26 N•m (20 lbf-in);
c) A screw capable of being tightened with a screwdriver other than No. 6 or No. 8 shall be tightened to a torque of 3.96 N•m (35 lbf-in);
d) An unslotted, bolthead screw, direct-bearing or securing a clamp, shall be wrenchtightened to a torque of 18.1 N•m (160 lbf-in).
|8.1.4||New clause added;|
Screws and screw type fasteners for doors or covers on enclosures marked per Clause 9.8 shall be tightened to the specified value.
|9.8||New section added;|
Screws and screw type fasteners
|9.8.1||When tested per Clause 8.1.4, the specified torque value shall:|
a) Be located on the enclosure and visible during installation, such as inside the cover or in the installation instructions shipped with the enclosure.
b) Consist of the following or equivalent: “Tighten screw to ___ N•m (in-lb)”.
c) Where different torque values are assigned to different screws, the markings shall be clear as to which torque value is assigned to which screw.