46 CFR § 111.05-19 - Tank vessels; grounded distribution systems.
---
identifier: "/us/cfr/t46/s111.05-19"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 111.05-19 - Tank vessels; grounded distribution systems."
title_number: 46
title_name: "Shipping"
section_number: "111.05-19"
section_name: "Tank vessels; grounded distribution systems."
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: "2026-04-08"
last_updated: "2026-04-08"
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"
---
# 111.05-19 Tank vessels; grounded distribution systems.
(a) If the voltage of a distribution system is less than 1,000 volts, line to line, a tank vessel must not have a grounded distribution system.
(b) If the voltage of a distribution system on a tank vessel is 1,000 volts or greater, line to line, and the distribution system is grounded (including high-impedance grounding), any resulting current must not flow through a hazardous (classified) location.
[CGD 94-108, 61 FR 28276, June 4, 1996, as amended at 62 FR 23907, May 1, 1997]
****Ground Detection