This International Standard addresses the design and installation of alternating current (AC) and direct current (DC) electrical systems used for the purpose of electrical propulsion and/or electrical hybrid (system with both a rechargeable battery and a fuelled power source) propulsion.This International Standard applies to electrical propulsion systems operated in the following ranges either individually or in combination:— direct current of less than 1 500 V DC;— single-phase alternating current up to AC 1 000 V;— three-phase alternating current up to AC 1 000 V.This International Standard applies to electrical propulsion systems installed in small craft up to 24 m length of the hull (LH according to ISO 8666).This International Standard also lists in Annex A additional information to be included in the owner’s manual as well as Annex B additional information to be provided to the installer.