---
kind: "section"
citation: "46 C.F.R. § 181.450"
title: "46"
number: "181.450"
heading: "Interconnected detection and alarm system."
url: "https://uscodex.org/cfr/46/181.450"
---

# §181.450. Interconnected detection and alarm system.

- (a) **An interconnected detection and alarm system must—**
  - (1) Consist of multiple-station smoke detectors listed by an NRTL, or independent laboratory accepted by the Commandant according to [46 CFR subpart 159.010](/cfr/46/subpart159.010.md), as meeting UL 217 (incorporated by reference, see [46 CFR 175.600](/cfr/46/175.600.md));
  - (2) Be installed such that the actuation of alarm in one area results in both audible and visual alarms in all areas required by 46 CFR [181.405(c)](/cfr/46/181.405.md?p=c) or [118.400(d)](/cfr/46/118.400.md?p=d) to be protected by the interconnected detection and alarm system;
  - (3) Contain an independent power source; and
  - (4) **Alarm on low power.**
- (b) A fire detection and alarm system of an approved type installed in accordance with [46 CFR part 76](/cfr/46/part76.md) would satisfy the requirements of this section.

## Notes

### Amendments

[USCG-2021-0306, 86 FR 73172, Dec. 27, 2021]

### Authority

Authority: 46 U.S.C. 2103, 3306; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; DHS Delegation 00170.1, Revision No. 01.4.

### Source

Source: CGD 85-080, 61 FR 982, Jan. 10, 1996, unless otherwise noted.

### Amendments

[USCG-2021-0306, 86 FR 73172, Dec. 27, 2021]