Section 14 Electrical equipment for use in explosive atmospheres

14.1.1 Electrical equipment is not to be installed in areas where an explosive atmosphere may be present, except where necessary for operational and/or safety purposes, when the equipment is to be of a certified safe type as listed below and details of the equipment and installation are to be submitted for consideration. The construction and type testing is to be in accordance with the relevant parts of IEC 60079: Explosive atmospheres or an acceptable and relevant National Standard.

14.1.2 The installation of electrical equipment in spaces and locations in which flammable mixtures are liable to collect, e.g. areas containing flammable gas or vapour and/or combustible dust, are, to comply with the relevant requirements of Pt 6, Ch 2, 14 Electrical equipment for use in explosive gas atmospheres or in the presence of combustible dusts of the Rules and Regulations for the Classification of Ships.

14.1.3 Where cables are installed in hazardous areas, precautions are to be taken against risks being introduced in the event of an electrical fault.

14.1.4 For craft with spaces for carrying vehicles or craft with fuel in their tanks for their own propulsion, the following requirements are also applicable:

1. electrical equipment fitted within a height of 45 cm above the vehicle deck, or any platform on which vehicles are carried, or within the exhaust ventilation trunking for the space, is to be of a safe type;

2. electrical equipment situated elsewhere within the space is to have an enclosure of ingress protection rating of at least IP55, if not of a safe type. (See IEC 60529: Degrees of protection provided by enclosures (IP Code)). Smoke and gas detector heads are exempt from this requirement.