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...
Typically, upon removal from exposure to carbon monoxide, symptoms usually resolve themselves, unless there has been an episode of severe acute poisoning. However, one case noted permanent memory loss and learning problems after a 3-year exposure to relatively low levels of carbon monoxide from a faulty furnace.