UL [Underwriters Laboratory] is a volutary testing organization that has been and often is tricked by munufacturers. I had a case involving a counter top appliance that was required to generate water at a maximum of 140 degrees F. The manufacturer submitted samples to UL for testing, and the first batch failed, making about 165 degrees. They resubmitted a new sample batch, which passed.

Trouble was, they already had made 50,000 units with the higher temp thermostat. They retrofitted 6 to send to UL with the conforming thermostat, and sent the rest to the public with a UL approved stamp on them.

UL was not amused when we uncovered the scam. Neither was the 4 y/o kid with 3rd degree burns.