{"data":{"id":"us/46-cfr-183.310","jurisdiction":"us","citation":"46 CFR 183.310","heading":"Power sources.","body":"(a)(1) Each vessel that relies on electricity to power the following loads must be arranged so that the loads can be energized from two sources of electricity:\n(i) The vital systems listed in § 182.710 of this chapter;\n(ii) Interior lighting except for decorative lights;\n(iii) Communication systems including a public address system required under § 184.610 of this chapter; and\n(iv) Navigation equipment and lights.\n(2) A vessel with batteries of adequate capacity to supply the loads specified in paragraph (a)(1) of this section for three hours, and a generator or alternator driven by a propulsion engine, complies with the requirement in paragraph (a)(1) of this section.\n(b) Where a ship service generator driven by a propulsion engine is used as a source of electrical power, a vessel speed change, throttle movement or change in direction of the propeller shaft rotation must not interrupt power to any of the loads specified in paragraph (a)(1) of this section.","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER T—SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS)","PART 183—ELECTRICAL INSTALLATION","Subpart C—Power Sources and Distribution Systems"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-46.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:22Z","sha256":"93d4b62fbed7d60092d04b63df184aab6c4736eb2ee407a8bc4984d2a199eb14","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-183.230","next":"us/46-cfr-183.320"},"notice":"GroundRules: Original legal text. Not legal advice."}