Electrical Definitions. Sealable Equipment. Equipment enclosed in a case or cabinet that is provided with a means of sealing or locking so that live parts cannot be made accessible without opening the enclosure. The equipment may or may not be operable without opening the enclosure.
How long does a Carbon Monoxide Alarm last? First Alert alarms are warranted for 5 years, then it should be replaced with a new CO Alarm. SensorPack Modules and batteries should be replaced as needed for those alarms requiring them. Source(s): http://www.firstalert.com/CarbonMonoxide...
Most other CO alarms only have a 5 to 7 year sensor life, making the 10 year manufacturer backed warranty for the C3010D the best in the market today. Kidde C3010D Features. The built-in 10 year sealed lithium battery doesn't activate until the unit is attached to its mounting bracket.