46 CFR § 111.05-3 - Design, construction, and installation; general.
---
identifier: "/us/cfr/t46/s111.05-3"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 111.05-3 - Design, construction, and installation; general."
title_number: 46
title_name: "Shipping"
section_number: "111.05-3"
section_name: "Design, construction, and installation; 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"
---
# 111.05-3 Design, construction, and installation; general.
(a) An electric apparatus must be designed, constructed, and installed to prevent any person from accidentally contacting energized parts.
(b) Exposed, noncurrent-carrying metal parts of fixed equipment that may become energized because of any condition must be grounded.
(c) In a grounded distribution system, only grounded, three-prong appliances may be used. Adaptors that allow an ungrounded, two-prong appliance to fit into a grounded, three-prong, receptacle must not be used. This does not apply to double-insulated appliances or tools and low voltage appliances of 50 volts or less.
(d) If the installation of the electrical equipment does not ensure a positive ground to the metal hull or equivalent conducting body, the apparatus must be grounded to the hull with a grounding conductor.
[CGD 74-125A, 47 FR 15236, Apr. 8, 1982, as amended by USCG-2020-0075, 88 FR 16360, Mar. 16, 2023]