Circuit 03 : (1) An electrical path of con-ducting components through which electrical current flows. (2) The conductor, or radio channel, and associated equipment used to transmit a fire alarm
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}