Approvals cUL-cRU
What are the differences between UL Listed and UL Recognized?
Most common UL certifications are the “UL Listed” and “UL Recognized” marks. However, the meaning of these two marks is sometimes misunderstood and we herewith try to explain their differences.
- The UL Recognized Component Mark means that the product has been tested as a component. These components will later be used in complete end-products or systems. Some additional installation precautions may be required. The devices covered under this category are incomplete in certain constructional features or restricted in performance capabilities and are intended for use as components of complete equipment submitted for investigation rather than for direct separate installation in the field. THE FINAL ACCEPTANCE OF THE COMPONENT IS DEPENDENT UPON ITS INSTALLATION AND USE IN COMPLETE EQUIPMENT SUBMITTED TO UL.
- UL Listed is for stand-alone products. UL Listed is the more stringent of the two and is recommended if the device is installed directly in a Division 2 or Zone 2 hazardous area. If the device is being installed in a larger system that will provide additional protection then you might consider UL Recognized.
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Meaning of cRUus
« c » means that the products with this type of mark have been evaluated to Canadian safety requirements.
« RU » means UL recognized.
« us » means that the products with this type of mark have been evaluated to US safety requirements.
This mark cRUus means that the product has been tested as a component. These components will later be used in complete end-products or systems. Some additional installation precautions may be required. The devices covered under this category are incomplete in certain constructional features or restricted in performance capabilities and are intended for use as components of complete equipment submitted for investigation rather than for direct separate installation in the field. The final acceptance of the component is dependent upon its installation and use in complete equipment submitted to UL.
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APPROVALS for individual Product Listings
Please see below, each individual Product, will have an Approvals Menu, example below
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“Condition of Acceptability from UL file Report” for cRUus approval vs cUL or CSA
Conditions of Acceptability
When installed in the end product, consideration shall be given to the following:
1. This component has been judged on the basis of the required Spacings in the Standard for Electrical Measuring and Test Equipment; Part 1: General Requirements, UL 61010B-1, First Edition and
CAN/CSA-C22.2 No. 1010.1-92, which would cover the component itself if submitted for Listing.
2. The terminals and connectors have not been evaluated for field wiring.
3. The equipment has been evaluated for use in a Pollution Degree 2 environment.
4. The suitability of the conductor size and terminal connector used should be determined in the end use application.
5. A suitable Electrical, Fire, and Mechanical enclosure shall be provided.
6. The component was tested for a maximum manufacturer’s recommended ambient of 50 ºC. If used in an ambient above 40 ºC, the factory wiring must be rated minimum 90 ºC; for ambient of 40 ºC and below, 75 ºC wiring insulation should be used.
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