This part of IEC 60092 specifies requirements for design, construction and installation of electrical systems in pleasure craft. It applies to pleasure craft for inland waters and to seagoing pleasure craft. The standard applies to the following types of electrical systems in pleasure craft which have a length of 24 m to 50 m, or which have a gross registered tonnage not exceeding 500 grt: a) single-phase alternating current systems which operate at a nominel voltage not exceeding 250 V; b) three-phase alternating current systems which operate at a nominel voltage not exceeding 500 V; c) direct current systems which operate at a nominel voltage not exceeding 50 V. The standard also applies to three-phase alternating current systems which operate at a nominel voltage not exceeding 500 V, in pleasure craft which have a length of less than 24 m.