---
kind: "section"
citation: "46 C.F.R. § 111.12-3"
title: "46"
number: "111.12-3"
heading: "Excitation."
url: "https://uscodex.org/cfr/46/111.12-3"
---

# §111.12-3. Excitation.


In general, excitation must meet [sections 4-8-3](/cfr/46/4-8-3.md)/3.13.2(a), 4-8-5/5.5.1, 4-8-5/5.5.2, and 4-8-5/5.17.5(e) of the ABS Marine Vessel Rules (incorporated by reference; see [§ 110.10-1](/cfr/46/110.10-1.md) of this subchapter), except that those for mobile offshore drilling units must meet [sections 6-1-7](/cfr/46/6-1-7.md)/5.17.1 and 6-1-7/5.19.1 of the ABS MOU Rules (incorporated by reference; see [§ 110.10-1](/cfr/46/110.10-1.md) of this subchapter). In particular, no static exciter may be used for excitation of an emergency generator unless it is provided with a permanent magnet or a residual-magnetism-type exciter that has the capability of voltage build-up after two months of no operation.


## Notes

### Amendments

[USCG-2020-0075, 88 FR 16360, Mar. 16, 2023]

### Authority

Authority: 46 U.S.C. 3306, 3703; DHS Delegation No. 00170.1, Revision No. 01.2. Section 111.05-20 and Subpart 111.106 also issued under sec. 617, Pub. L. 111-281, 124 Stat. 2905.

### Source

Source: CGD 74-125A, 47 FR 15236, Apr. 8, 1982, unless otherwise noted.

### Amendments

[USCG-2020-0075, 88 FR 16360, Mar. 16, 2023]