NEW CLASS B, C AND D AND EXISTING CLASS B SHIPS:

Exposed metal parts of electrical machines or equipment which are not intended to be live but which are liable under fault conditions to become live shall be earthed unless the machines or equipment are: supplied at a voltage not exceeding 50 V direct current or 50 V, root mean square, between conductors; auto-transformers shall not be used for the purpose of achieving this voltage; or supplied at a voltage not exceeding 250 V by safety isolating transformers supplying only one consuming device; or constructed in accordance with the principle of double insulation. All electrical apparatus shall be so constructed and so installed as not to cause injury when handled or touched in the normal manner. The sides and the rear and, where necessary, the front of switchboards shall be suitably guarded. Exposed live parts having voltages to earth exceeding the voltage specified under 1.1 shall not be installed on the front of such switchboards. Where necessary, non-conducting mats or gratings shall be provided at the front and rear of the switchboard. In distribution systems with no connection to earth, a device capable of monitoring the insulation level to earth and giving an audible or visual indication of abnormally low insulation values shall be provided. All metal sheaths and armour of cables shall be electrically continuous and shall be earthed. All electrical cables and wiring external to equipment shall be at least of a flame-retarding type and shall be so installed as not to impair their original flame-retarding properties. Where necessary for a particular application, the Administration of the flag State may permit the use of special types of cables, such as radio frequency cables, which do not comply with the foregoing.

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Source: EUR-Lex (Cellar) · retrieved 2026-11-10 · Text as adopted (Official Journal); later amendments are not incorporated in this text.