Electrical installations in ships Part 3: Cables (construction, testing and installations)
|Publication Date:||1 January 1965|
|ICS Code (Cables):||29.060.20|
|ICS Code (Electrical equipment of ships and of marine structures):||47.020.60|
The operating conditions in ships sailing the seven seas as far as they affect electrical appliances are the same regardless of where the ship is built. Except for variations in quality, the materials used in the construction of electrical appliances .are similar and are subject to the same natural laws. The characteristics of electric circuits and the behaviour of appliances are likewise predeterminable and follow the same fundamental laws irrespective of the country of origin.
It is accordingly feasible to establish international standards to secure that degree of performance, reliability and safety which are essential for the well-being of crews and passengers alike and for the safe carriage of valuable cargoes.
It is for the fulfilment of these ends that the present Recommendations have been formulated. Shipbuilders, electrical contractors and manufacturers engaged in the building of ships for the international market are faced at present with several codes of rules and regulations with which to comply , although, as already stated, the conditions of service are identical.
It is recognized that apparatus manufactured in various countries will inevitably differ in appearance and conception, but for the same duties similar apparatus and materials will necessarily have to meet the same service conditions. This code has therefore been drafted in the form of "Recommendations" thus allowing the fullest possible scope for the manufacturer to use initiative in the design and development of his product and to use existing tools and patterns so far as they are suitable.
Complete and progressive co-operation between the naval architect, the shipbuilder, the owner and the designer and installer of the electrical installation are essential from the earliest stages right through to completion to ensure not only that all services required of the electrical appliances are met, but that proper and suitable space and accommodation is provided for electric cables and appliances.
It is not intended to exclude new materials, appliances and methods or to discourage invention.
It cannot be too strongly emphasized that good technical design, the correct choice of apparatus, good and suitable materials and, above all, good workmanship are essential for a sound installation. The Recommendations are not intended to take the place of a detailed specification or to instruct untrained persons.
These Recommendations make reference, in several of their chapters, to other IEC Publications. It should be understood that the editions of these Publications in force on the date of issue of these Recommendations, are the only valid ones, in so far as they are not in contradiction with them.
Moreover, Technical Committee No.18 may be led to amend and supplement these Recommendations, either because of the issue of new IEC Publications or due to amendments made by other Committees to existing IEC Publications, to the extent in which the corresponding Recommendations concern the work of Technical Committee No.18.
The present Recommendations are not to be regarded as a substitute for, or as additional Rules to, the Classification Rules and National Standards. Where a shipowner requests the observance of these Recommendations when ordering his vessel, he should not give this request the character of a stipulation. Where there are deviations, the Rules of the Classification Societies and the National Standards have preference over the Recommendations.
Notes 1.) - All dimensions in these Recommendations are, in the first place, given in metric units; figures in brackets in British and American units are not exact numerical equivalents of the metric quantities, but are the nearest dimensions in practical use in the respective countries.
2.) - The Chapters in Part f apply to all installations and to the equipment dealt with in all other Parts of these Recommendations, i, e. Part 2 to Part 6.