While a full, downloadable version of is typically not available for free due to copyright, you can officially view the standard online at no cost. 🛠️ How to Access UL 508A for Free
While I couldn't find a free, official PDF download of UL 508A 2022, I can suggest a few options:
If you are looking for specific changes in the 3rd edition (issued in 2022), focus on these areas: SCCR Documentation