QO Back-Fed Main Breaker Barrier

Square D QO Service Entrance Barriers provide an extra level of safety to installed load centers. They are used for additional safety to installed load centers for future maintenance contractors. It insulates the always energized lugs when the main is turned off. For Back-Fed Main Breakers.”,”highlights”:[“Used ONLY with 60 amp through 100 amp QO load centers”,”For use when a branch breaker is used as a Back-Fed Main Breaker”,”UL67 Compliant”