46 CFR §76.01-5

1. (a)Where extinguishing systems or equipment are not required, but are installed, the system or equipment and its installation must meet the requirements of this part.
2. (b)Use of non-approved fire detection systems may be acceptable as excess equipment provided that:
   1. (1)Components are listed by a nationally recognized testing laboratory (NRTL) as that term is defined in 46 CFR 161.002-2, and are designed, installed, tested, and maintained in accordance with an appropriate industry standard and the manufacturer's specific guidance;
   2. (2)Installation conforms to the requirements of 46 CFR chapter I, subchapter J (Electrical Engineering), especially the hazardous location electrical installation regulations in 46 CFR 111.105; and
   3. (3)Coast Guard plan review is completed for wiring plans.