In a previous blog post I discussed UL Wire types. However, something that does seem to come up is the question of “What is the difference between UL Listed and UL Recognized?”
The answer to this question is answered with the help of Lütze Ltd, a German manufacturer of cable specialising in the area of control and automation.
Lütze asks “As a manufacturer of machinery, how confident are you that you meet the legal and technical requirements of the US and North American markets?”
Confusion over UL508A and NFPA – the main standards affecting machine building – can be extremely costly without specialist knowledge.
Many believe that by simply selecting UL listed components and integrating them into a control panel that carries a UL (NEMA) rating, is the start and end of the matter. In fact, a number of machinery manufacturers adopt this approach and may manage to escape any serious issues.
That is until they come up against a more stringent inspection, whether state specific or just a more thorough site inspector – then the problems can be huge: re-working, supplying new components, and even the time and financial cost of dispatching engineers overseas to resolve the issues as quickly as they can.
Cable confusion
Standards strictly define the cable types, but the choice of how you use them is often part of the confusion.
So, what is the difference between Listing, Recognition and Classification?
LISTING SERVICE – A service whereby UL determines that a manufacturer has demonstrated the ability to produce a product that complies with UL requirements with respect to reasonably foreseeable risks associated with the product.
As part of the service, UL authorizes the manufacturer to use the UL Listing Mark on products that comply with UL requirements and establishes Follow-Up Service conducted by UL as a check of the means the manufacturer exercises to determine compliance with UL requirements.
RECOGNITION SERVICE – A service whereby UL determines that a manufacturer has demonstrated the ability to produce a component for use in an end product that complies with UL requirements.
It takes into account the performance and constructional characteristics of such end product insofar as this can be determined and the areas that require additional consideration for application of the component to the product. UL authorizes the manufacturer to use the UL Recognized Marking.
On UL Listed and UL Recognized cable
In a previous blog post I discussed UL Wire types. However, something that does seem to come up is the question of “What is the difference between UL Listed and UL Recognized?”
The answer to this question is answered with the help of Lütze Ltd, a German manufacturer of cable specialising in the area of control and automation.
Lütze asks “As a manufacturer of machinery, how confident are you that you meet the legal and technical requirements of the US and North American markets?”
Confusion over UL508A and NFPA – the main standards affecting machine building – can be extremely costly without specialist knowledge.
Many believe that by simply selecting UL listed components and integrating them into a control panel that carries a UL (NEMA) rating, is the start and end of the matter. In fact, a number of machinery manufacturers adopt this approach and may manage to escape any serious issues.
That is until they come up against a more stringent inspection, whether state specific or just a more thorough site inspector – then the problems can be huge: re-working, supplying new components, and even the time and financial cost of dispatching engineers overseas to resolve the issues as quickly as they can.
Cable confusion
Standards strictly define the cable types, but the choice of how you use them is often part of the confusion.
So, what is the difference between Listing, Recognition and Classification?
LISTING SERVICE – A service whereby UL determines that a manufacturer has demonstrated the ability to produce a product that complies with UL requirements with respect to reasonably foreseeable risks associated with the product.
As part of the service, UL authorizes the manufacturer to use the UL Listing Mark on products that comply with UL requirements and establishes Follow-Up Service conducted by UL as a check of the means the manufacturer exercises to determine compliance with UL requirements.
RECOGNITION SERVICE – A service whereby UL determines that a manufacturer has demonstrated the ability to produce a component for use in an end product that complies with UL requirements.
It takes into account the performance and constructional characteristics of such end product insofar as this can be determined and the areas that require additional consideration for application of the component to the product. UL authorizes the manufacturer to use the UL Recognized Marking.
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