UL Standard for Safety for Ground-Fault Circuit-Interrupters, UL 943
Fifth Edition, Dated May 17, 2016
Summary of Topics
This revision of the Standard for Safety for Ground-Fault Circuit-Interrupters, ANSI/UL 943,
includes the following changes in requirements:
Expansion of Auto-Monitoring and End of Life Requirements to All Types of GFCIs
Addition of Requirements for Programmable Components
Improving the Auto-Monitoring Function of Permanently Connected Ground-Fault Circuit
Interrupters
The new/revised requirements are substantially in accordance with Proposal(s) on this subject dated
August 25, 2017.
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with a vertical line in the margin.
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FEBRUARY 23, 2018 − UL 943 tr1
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