New provisions account for higher ambient operating temperatures. 3. Power & Control Circuit Changes
: Under Section 66.4.4, the update fully mandated the inclusion of a Class A Ground-Fault Circuit Interrupter (GFCI) protection device for all general-purpose receptacle convenience outlets built into the panel. ul 508a 2022 pdf hot
Component temperature ratings and wire ampacities received structural clarification. ul 508a 2022 pdf hot
The panel must have a calculated SCCR, which is determined by the lowest-rated component in the power circuit. ul 508a 2022 pdf hot