New provisions for electromagnetic interference filters when used with variable-speed drives. Supplement SA Reorganization:
Yes, but you also need CSA C22.2 No. 286. The 3rd Edition includes a Canadian National Difference appendix. Ul 508a 3rd Edition Pdf
A: Check the original panel nameplate. It should have a UL file number (e.g., E123456) and sometimes the standard revision date. Contact UL’s customer service with that file number to request the historical standard used during its certification. Ul 508a 3rd Edition Pdf