scope:

This part of IEC 60092 specifies 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 registered tonnage not exceeding 500 GRT, designed for use on inland waters or at sea. It is not intended to apply to small craft equipped with a battery supplying circuits for engine starting and navigation lighting only, recharged from an inboard or outboard engine driven alternator.
NOTE 1 For alternating current systems having voltages exceeding 250 V single-phase or 500 V three-phase, for direct current systems exceeding 50 V, and for vessels larger than 500 GRT or with a length greater than 50 m, other standards within the IEC 60092 series apply.
NOTE 2 Attention is drawn to regulations which govern specific requirements for navigation lights for small vessels.
NOTE 3 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 24 m in length and over, and Council Directive 98/18/EC applies to passenger ships.
Attention is also drawn to the recreational craft directive 94/25/EC and 2003/44/EF. For high speed crafts, attention is drawn to the International code of safety for high-speed craft (HSC Code).
This standard applies to the following types of d.c. and a.c. electrical systems, individually or
in combination:
a) direct current system which operates at a nominal voltage not exceeding 50 V;
NOTE For example, for many small vessels, this will be the main electrical system. Alternatively, a vessel equipped with an a.c. system as its principal electrical system may be also equipped with a d.c. system for navigation and communications equipment supplied from batteries.
b) single-phase alternating current system which operates at a nominal voltage not
exceeding 250 V;
NOTE 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 a.c. system. A vessel may also be equipped with d.c. system(s) as in a) above.
c) three-phase alternating current system which operates at a nominal voltage not exceeding
1 000 V.
NOTE 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 a.c. subsystem(s) and d.c. subsystem(s).