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...
Starting July 1, any battery-powered smoke alarm or combination (smoke and carbon monoxide) alarm approved for sale by the state fire marshal must be powered by a sealed, 10-year battery. Kidde Worry-Free smoke and combination alarms comply with the new law and are available throughout the state.