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  2. Nationally Recognized Testing Laboratory - Wikipedia

    en.wikipedia.org/wiki/Nationally_Recognized...

    Nationally Recognized Testing Laboratory is the term used by the United States Occupational Safety and Health Administration to identify third-party organizations that have the necessary qualifications to perform safety testing and certification of products covered within OSHA and each organization's scopes.

  3. ETL SEMKO - Wikipedia

    en.wikipedia.org/wiki/ETL_SEMKO

    ETL SEMKO (formerly Electrical Testing Laboratory) is a division of Intertek Group plc (LSE: ITRK) which is based in London. [1] It specializes in electrical product safety testing, EMC testing, and benchmark performance testing. ETL SEMKO operates more than 30 offices and laboratories on six continents.

  4. UL (safety organization) - Wikipedia

    en.wikipedia.org/wiki/UL_(safety_organization)

    The UL enterprise [4] is a global private safety company headquartered in Northbrook, Illinois, composed of three organizations, UL Research Institutes, UL Standards & Engagement and UL Solutions. Established in 1894, the UL enterprise was founded as the Underwriters' Electrical Bureau (a bureau of the National Board of Fire Underwriters ), [ 5 ...

  5. Extract, transform, load - Wikipedia

    en.wikipedia.org/wiki/Extract,_transform,_load

    A common source of problems in ETL is a big number of dependencies among ETL jobs. For example, job "B" cannot start while job "A" is not finished. One can usually achieve better performance by visualizing all processes on a graph, and trying to reduce the graph making maximum use of parallelism , and making "chains" of consecutive processing ...

  6. National Electrical Code - Wikipedia

    en.wikipedia.org/wiki/National_Electrical_Code

    These are examples of "national recognized testing laboratories" (NRTL) approved by the U.S. Department of Labor's Occupational Safety and Health Administration (OSHA) under the requirements of 29 CFR 1910.7. [9] Only a listed device can carry the listing brand (or "mark") of the listing agency.

  7. Mace Security International - Wikipedia

    en.wikipedia.org/wiki/Mace_Security_International

    2009: Central Station Security Systems, Inc. becomes Mace Central Station, Inc. and becomes one of the first US central stations to earn the ETL listing. 2020: Now 100% focused on the personal safety and security space.

  8. Certification mark - Wikipedia

    en.wikipedia.org/wiki/Certification_mark

    Canadian certification label on a bag of rockwool Counterfeit electrical cords with false UL certification marks. A certification mark on a commercial product or service is a registered mark that enables its owner ("certification body") to certify that the goods or services of a particular provider (who is not the owner of the certification mark) have particular properties, e.g., regional or ...

  9. List of reporting marks: E - Wikipedia

    en.wikipedia.org/wiki/List_of_reporting_marks:_E

    ETL - Essex Terminal Railway; ETMX - Etarco Rail Services Corporation; ETR - Essex Terminal; ETRX - Arkansas Power and Light Company; ETRY - East Tennessee Railway;