---
kind: "section"
citation: "46 C.F.R. § 112.20-5"
title: "46"
number: "112.20-5"
heading: "Failure of power from the normal source or final emergency power source."
url: "https://uscodex.org/cfr/46/112.20-5"
---

# §112.20-5. Failure of power from the normal source or final emergency power source.

- (a) If there is a reduction of potential of the normal source by 15 to 40 percent, the loads under [§ 112.15-1](/cfr/46/112.15-1.md) must be automatically supplied from the temporary emergency power source.
- (b) For systems in which a reduction of frequency of the normal source or final emergency power source adversely affects the emergency system and emergency loads, there must be means to transfer the loads under [§ 112.15-1](/cfr/46/112.15-1.md) to the temporary emergency power source upon a reduction in the frequency of the normal source or final emergency power source.

## Notes

### Authority

Authority: 46 U.S.C. 3306, 3703; DHS Delegation No. 00170.1, Revision No. 01.2.

### Source

Source: CGD 74-125A, 47 FR 15267, Apr. 8, 1982, unless otherwise noted.