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Visual Signal Appliances for General Signaling Use (Edition 1, June 22, 2016). Original standard UL 1638A 2016-06 in PDF full version. Additional info + preview on request

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Visual Signal Appliances for General Signaling Use (Edition 1, published June 22, 2016; revisions through September 21, 2021; ANSI reaffirmation 2021). Original standard UL 1638A 2021-09 in PDF full version. Additional info + preview on request

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Visual Signal Appliances for General Signaling Use (Edition 1, published June 22, 2016; revisions through March 18, 2026; ANSI reaffirmation 2026). Original standard UL 1638A 2026-03 in PDF full version. Additional info + preview on request

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Portable Power-Distribution Equipment (Edition 4, November 14, 2016). Original standard UL 1640 2016-11 in PDF full version. Additional info + preview on request

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Portable Power-Distribution Equipment (Edition 4, published November 14, 2016; revisions through July 14, 2021). Original standard UL 1640 2021-07 in PDF full version. Additional info + preview on request

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Portable Power-Distribution Equipment (Edition 4, published November 14, 2016; revisions through November 12, 2025; ANSI reaffirmation 2025). Original standard UL 1640 2025-11 in PDF full version. Additional info + preview on request

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