Bulletin No. 0613DB9902 Data Bulletin June （6月0613号公报db9902数据公报）.pdfVIP

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Bulletin No. 0613DB9902 Data Bulletin June （6月0613号公报db9902数据公报）.pdf

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Bulletin No. 0613DB9902 Data Bulletin June （6月0613号公报db9902数据公报）

Bulletin No. 0613DB9902 June 1999 Data Bulletin Cedar Rapids, IA USA ANSI® C37 Standard and UL® 489 Standard Comparison EVOLUTION OF PRODUCTS AND Since Ben Franklin discovered electricity, people have been struggling to MARKETS harness its energy and use it safely. As the use of electricity spread into residences and commercial businesses, the need for personal safety and protection against fires became clear. People needed products that were safe to use and afforded protection against the hazards of fire. They used electricity in their homes and businesses but were not trained to determine the types of products they needed to protect themselves and their property. Underwriters Laboratories Inc.® ® Underwriters Laboratories Inc. (UL), was set up in the late 1800s to test many (UL ) products for the insurance industry. Fire safety and prevention were a major concern. UL, working with electrical manufacturers, developed standards for