Summary of Topics
This revision of ANSI/UL 879 dated September 3, 2025 includes the following changes in requirements:
– Scope; 1.1.1 – 1.1.3 and 1.1.4 (deleted).
– Component use; Section 1.2 (deleted).
– Glossary; Section 1.3.
– Service and maintenance; 1.3.2, 1.3.58A, 2.3.1, 2.6.1, 2.6.3, 2.9.1, 2.11.2.4 (deleted), 2.11.3.1.1, Table 2.23, 3.2.2.16.1, and 3.4.2.7.1.5.
– Enclosures; 2.1.1.1, 2.1.1.4 (deleted), 2.1.4.1 (deleted), 2.1.4.2, 2.1.4.3 – 2.1.4.7 (deleted), 2.12.6 and 2.12.6.1 (titles), 2.12.6.1.1 (deleted), 2.16.8 (deleted), and Table 3.9.
– Cast metal thickness; Table 2.1.
– Polymeric insulating barriers; 2.2.2 and 2.13.1.
– Polymeric accessibility barriers; 2.3.1 and 2.3.3, 2.3.4 and 2.3.6 (deleted).
– Deletion of Section 2.5 Sign Body requirements.
– Grounding and Bonding; 2.11.0.1, 2.11.0.2, 2.11.3, 2.11.4.1, 2.11.5 (deleted), and 2.16.6 (deleted).
– Polymeric Material UV Conditioning Equipment; 3.2.1.5.1 and 3.2.1.5.2.
– Referral of polymeric material tests to UL 746; 3.2.2.1 – 3.2.2.9 (deleted), 3.2.2.11 (deleted), 3.2.2.12 (deleted), 3.2.2.17 (deleted) and 4.14.3.1.
– Material dielectric voltage withstand test ; 3.2.2.16.1 – 3.2.2.16.3 (deleted), and Table 3.6A.
– Impact Test; 3.4.1.6.2.
– Removal of unused product tests; 3.4.1.10.1, 3.4.1.15.1, 3.4.1.16.1, and 3.4.2.8 (deleted).
– Abnormal component breakdown test; 3.4.2.7.3, 4.17.5.3, and 4.22.5.4.
– Installation and assembly test; 3.4.3.1 (deleted) and 5.8.5.1.
– Non-enclosure rated polymeric sign bodies; Section 4.11.
– Sign body polymeric enclosure materials; 4.12 (title), 4.12.1.1, 4.12.2.1, 4.12.2.2, 4.12.3.1 – 4.12.3.5, 4.12.4.1 (deleted), 4.12.5.1 (deleted), and 4.12.6.1.
– LED Displays; 2.14.9.1, Section 4.18A, Section 4.18 (deleted), and Section 4.23.1 – 4.23.5.
– Fabric Sign Face Assemblies; Section 4.24.
– Aluminum composite materials (ACM); 1.3.4A and Section 4.25.
– Editorial corrections; 3.4.1.13.1.3, 3.4.2.5.2.1, 3.4.1.13.5 (title), Table 3.9.1, 4.1.2 (deleted), Table 4.1 (deleted), 4.1.4, 4.1.5 (deleted), 4.21.6.2, 4.22.6.2, 5.4.5.4, 5.13.4.21.1, and 5.15.2.3.