Defines requirements for the design, construction and installation of electrical systems in small vessels, which have a length of up to 50 m, or which have a gross tonnage not exceeding Gross Tonnes (GT), designed for use on inland waters or at sea.

1.1 General This part of IEC60092 specifies requirements for the design, construction and installation of electrical systems in small vessels, which have a length of up to 50m, or which have a gross tonnage not exceeding 500 Gross Tonnes (GT), designed for use on inland waters or at sea. It is not intended to apply to: small craft equipped only with a battery supplying circuits for engine starting and navigation lighting recharged from an inboard or outboard engine driven alternator. recreational craft of less than 24m hull length requiring to conform to the Recreational Craft Directive 94/25/EC Annex1 Essential Requirements Part5.3 Electrical systems, except for three-phase alternating current installations in such recreational craft which operate at a nominal voltage not exceeding AC 500V. 1.2 Electrical systems This standard applies to the types of DC and AC electrical systems described below, individually or in combination. Direct current system which operates at a nominal voltage not exceeding DC 50V. For many small vessels, this will be the main electrical system supported by batteries for engine starting, navigation lights, navigational aids and communications equipment, lighting and other DC power consumer or converter equipment. Single-phase alternating current system which operates at a nominal voltage not exceeding AC 250V. Such a system may be the principal electrical power system of a vessel or a system which may only be energized when connected to a shore supply. AC extra-low voltage, safety extra-low voltage, and other circuits may also comprise part of a single-phase AC system. A vessel may also be equipped with DC system(s) for equipment supplied from batteries as in 1.2a) above. Three-phase alternating current system which operates at a nominal voltage not exceeding AC 500V. The three-phase system is likely to be the principal electrical power system of a vessel’s electrical installation. Such a vessel may also be equipped with single-phase AC circuits(s) similar to 1.2b) above and DC system(s) for equipment supplied from batteries as in 1.2a) above. NOTE1 Concerning recreational craft of less than 24m hull length referenced in 1.1b) above, the following standards apply: for direct current installations which operate at a nominal voltage not exceeding DC 50V: ISO10133 ; for single-phase alternating current installations which operate at a nominal voltage not exceeding AC 250V single phase: ISO13297 . NOTE2 For alternating current systems having voltages exceeding AC 250V single-phase or AC 500V three-phase, for direct current systems exceeding DC 50V, and for vessels larger than 500GT or with a length greater than 50m, other standards within the IEC60092 series apply. NOTE3 Attention is drawn to regulations which govern specific requirements for navigation lights for small vessels. NOTE4 Attention is drawn to the fact that, in some countries the EC Directives covering EMC ( 89/336/EEC ), low voltage ( 73/23/EEC ) and general product safety ( 92/59/EEC ) may be applied. In addition, Council Directive 97/70 applies to fishing vessels of 24m in length and over, and Council Directive 98/18/EC applies to passenger ships. For high speed crafts, attention is drawn to the International code of safety for high-speed craft (HSC Code).