Fire Alarm Control Panel 33 : Panel Alerting: (10) DC Power: This is used to tell the operator that DC power (batteries) are being charged or used. While using DC power, the system remains in a trouble condition
Wikipedia, The Free Encyclopedia, Glossary of firefighting terms, Wikimedia Foundation, CA, USA 2012. http://en.wikipedia.org/wiki/Glossary_of_firefight ing_terms, (Fr Srvc - Amer) {510}