Ul 508a 3rd Edition Pdf -

Ambient operating temperatures not exceeding 40°C (104°F) .

New rules for the use of ferrules, updated marking for multiple disconnect switches, and revised ratings for the largest main overcurrent protective devices. Ul 508a 3rd Edition Pdf

Approximately $500–$900 USD depending on the revision. Ambient operating temperatures not exceeding 40°C (104°F)