[Code of Federal Regulations] [Title 46, Volume 4] [Revised as of October 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 46CFR108.407] [Page 133] TITLE 46_SHIPPING (This book contains parts 90 to 139) CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 108_DESIGN AND EQUIPMENT--Table of Contents Subpart D_Fire Extinguishing Systems Sec. 108.407 Detectors for electric fire detection system. (a) Each detector in an electric fire detection system must be located where-- (1) No portion of the overhead of a space protected is more than 3 meters (10 feet) from a detector; (2) Beams and girders extending below the ceiling of the space protected and any other obstructions do not detract from the effectiveness of the detector; and (3) Damage to the detector is unlikely to occur if it is not protected. (b) Each detector must be set to activate at not less than 57[deg] C (135[deg] F) and at not more than 73[deg] C (165[deg] F), except that if a space normally has a high ambient temperature each detector may be set to activate at not less than 80[deg] C (175[deg] F) and not more than 107[deg] C (225[deg] F).