Mike Dolt Enterprises
Mike Dolt Enterprises
User: renosteinke, Location: NE Arkansas
Asked on: Monday, March 14, 2011 at 11:13 am EDT
Answered on: Tuesday, May 14, 2024 at 2:47 am EDT
Question: We often use these words, in our quest to properly do our jobs. Yet, it helps to keepp in mind that none of our sources - be they the NEC, the 'White Book", UL statement, OSHA letters, manufacturer statements, whatever - are infallible. You just can't avoid making your own call.Take, as an example, this product's spec sheet:http://www.cattron.com/dnn/Portals/0/pdf/brochures/LCAS.pdfBy all accounts, this is a responsible manufacturer, making a quality product. Yet, I have to ask: is it NEMA-4X or not? Is there an editing issue or a product issue?I'll bet others here can come up with other examples of contradictory instructions. Feel free to post your best ...
NEMA-4X Rating Discrepancy
The Cattron LCAS spec sheet states "NEMA 4/4X" on page 2. However, the company's website lists the LCAS without the "4X" rating: https://www.cattron.com/en-us/products/magnetic-enclosures/lcas
Other Examples of Contradictory Instructions
NEC and UL Conflict on Surge Protection
The NEC requires surge protection for certain circuits (Section 210.12). However, UL states that surge protection is not always necessary and can be counterproductive in some cases (UL Subject 623).
OSHA and ANSI Interpretations on Ladder Safety
OSHA requires ladders to be placed at an angle of no less than 75.5 degrees (Angle A in the image below):[Image of a ladder with specified angles] ANSI A14.5, a widely recognized safety standard, provides a more specific requirement: Angle A should be between 75.5 degrees and 80.5 degrees.
Manufacturer and UL Statements on Grounding
A lighting fixture manufacturer may state that its product does not require grounding. UL may list the fixture as requiring grounding for safety reasons.
Manufacturer and Third-Party Testing on Product Durability
A manufacturer may claim that its product meets certain durability standards. Independent testing by a third party may reveal that the product does not meet those standards.
It is important to note that these contradictions are not always errors. In some cases, different sources may provide different perspectives or interpretations based on their specific scopes or intended audience. Flag for review