This revision of ANSI/UL 508 dated July 8, 2021 includes the following changes in requirements: – Correction of Fahrenheit temperature values in Table 45.2 – Update to lithium battery requirements; Section 31 and 72.14 – Clarification of the use of Table 45.2 (Maximum enclosure surface temperature rises); 45.2, 45.3 and 45.4 – Correction to DC Offset Test for dimmers; Table 189.1 and 193.2 – Addition of LED driver rating; Table 48.1, 68.1, Table 69.4 and 70.11 – Revision of scope to reflect effective UL 60947 standards; 1.3, 1.11, 19.2.6, Table 56.1, Table 74.1, Sections 78 – 109, 163 – 186, – Ground current requirement for flush-device box switches controlling lighting loads; Sections 42.4, 66A, 68A, 70.40 – Withdrawal of UL 508C reference in UL 508, replacing UL 508C with UL 61800-5-1; 1.6