The CPSC has absolutely nothing to do with the UL listing of a product. The allegations made by New York state were limited to 2-pole breakers alone, and there were difficulties repeating the test results.

The allegation of falsified test data came up years later in a lawsuit, and also had nothing to to do with the UL listings. UL does not depend upon the manufacturer for test results; the UL rep goes to the plant, selects the samples at random, and testing is done by UL at UL's facilities.

I have never heard about Zinsco having lost it's listing .... any links?