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...
As you likely know, carbon monoxide detectors are now required in California for all single family dwellings as of July 1, 2011 (apartments by January 1, 2013). Any dwelling with a gas heater or appliance, fireplace or attached garage must install a carbon monoxide alarm (First Alert).