Engineers and facility managers looking for compliant hardware can consult the UL Product iQ database to verify the certifications of specific manufacturers. Common brands producing UL 242 vents include Morrison Bros. Co. and other specialized petroleum equipment manufacturers.
Compliance with UL 242 is typically required for medium-voltage power cables used in various applications, including: ul 242
The investigation revealed that the non-UL 242 thermostat had developed a film of corrosion on its bimetal disc after just 14 months in a humid basement. That film created electrical resistance, which generated heat, which fooled the thermostat into thinking the water was hotter than it was. The heater never shut off. which generated heat