Summary: tests to 20 March 2017 Number Tested n=1111Failure Percent Total # Zinsco-Type Circuit Breakers Tested ( Zinsco + UBI-ZInsco)111 Breakers Failing to Meet UL 135% Trip Requirement3228.8% Critical Safety Failures (no trip @ 200%) Subset of the 135% no-trip total2*1.8% ...