UL Standards free download UL 489B-2016 pdf download – Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-Breaker Enclosures for Use with Photovoltaic (PV) Systems UL 489B-2016 pdf download - Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-Breaker Enclosures for Use with Photovoltaic (PV) Systems. 1 2.2 A PV circuit breaker shall be wired with a conductor sized in accordance with Table 8.1... 02-08 Download Now