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...
It is recommended that you replace any smoke alarm and carbon monoxide alarm after being in use for 10 years. As electronic devices, smoke detectors are subject to random failures. In 10 years there is roughly a 30% probability of failure before replacement. After 15 years, the chances are better than 50:50 that your alarm will fail. That is too big of a risk to take. If your smoke alarm was manufactured in 2006 or before, it must be replaced! Replacing alarms after 10 years protects against the chance of failure, but monthly testing is still your best means of making sure your alarm will work. Regular testing of your smoke alarm is vital.