Meter-Treater, Inc.

UL 1449 3rd Edition

These links offer important information about the ANSI/UL 1449 3rd Edition Safety Standards for Surge Protection Devices:

Presentation: An Overview of UL 1449 3rd Edition for Engineering Professionals

OWHX and UL 1449 Third Edition - A Closer Look

Explanation of changes from UL 1449 2nd Edition to 3rd Edition

UL Specifications and ETL Listings

ETL Listing Marks vs. UL Listing Marks

OSHA Approved Nationally Recognized Testing Laboratories (NRTL)

ETL vs. UL Listed

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Since 1986

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