46 CFR § 111.51-1 - General.

---
identifier: "/us/cfr/t46/s111.51-1"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 111.51-1 - General."
title_number: 46
title_name: "Shipping"
section_number: "111.51-1"
section_name: "General."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "J"
subchapter_name: "ELECTRICAL ENGINEERING"
part_number: "111"
part_name: "ELECTRIC SYSTEMS—GENERAL REQUIREMENTS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
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."
regulatory_source: "CGD 74-125A, 47 FR 15236, Apr. 8, 1982, unless otherwise noted."
cfr_part: "111"
---


# 111.51-1 General.

Electrical installations must be protected against short circuits, by appropriate devices. The selection, arrangement and performance of various protective devices must provide coordinated automatic protection and selective operation in order to provide continuity of service for equipment vital to the propulsion, control, or safety of the vessel under short-circuit conditions through coordination and selective operation of overcurrent protective devices.