The architecture, conventionally implemented in marine installations, for the distribution of electrical power is the Radial scheme. In a Radial scheme, power is routed to each consumer directly from a centrally positioned source, such as a switchboard or an MCC. Since the consumers are dispersed in a large, highly complex, three dimensional environment, implementation of a Radial scheme results in many cables spanning over large distances of the ship. An alternative strategy is to introduce power into major portions of the vessel via a power bus and hang consumers locally from the bus. Such major portions of the vessel where the power bus brings power in, are termed “Zones”. The boundaries of the electrical Zones are defined such that they coincide with the fire-tight and watertight zonings, and also with the demarcation lines of construction modules. In the Zonal scheme, only the power bus needs to span the ship, while consumers in each Zone are fed radially in a localized environment and hence require only short cable runs, which also lend themselves well for pre-fit into each construction module.

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